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Section 5: Reticular canal system for interlinking Indian rivers. 
Chapter 10: Reticular canal system (RCS). 
3. So, what are the uses of RCS? 
165
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
1) Reticular pattern of canal system is more 
advantageous, with this, the entire India can be 
irrigated. All the nooks and corners of the India will 
get some water supply either through primary or 
secondary or tertiary channel system. As compared 
to single channel system that connects north 
Indian rivers with south Indian rivers the reticular 
pattern of canal system is more useful, cost 
effective and harmless. 
166
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
It is because, the single channel system, 
a) Can irrigate only few areas in the nation, may be 25 - 50 
kilometers on either the sides of the channel, if sub 
channels are created. 
b) At places we may have to dig very deep to make the free 
flow of water/it may need underground channels also. 
c) If natural calamities like flood occurs most of the south 
Indian places and cities may be affected by the flood, and 
can cause more damage. 
167
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
It is because, the single channel system, 
d) There is an absolute necessity to protect the 
control system of this main channel, because evil 
forces may put the threat that they are going to 
damage the control gate. 
e) The expense may be very high as compared to 
the benefit, and it needs lot of machine and man 
power and local peopleโ€™s participation may be 
very less as it is mainly a central channel. 
168
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
It is because, the single channel system, 
f) The necessity of shifting many cities/villages may 
be required to create one main channel. Since this 
channel is very wide and big, we may need to 
construct big bridges to connect the people on 
either the sides of the main canal, the need to 
protect this bridges from the evil forces may also 
arise. 
169
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
2) Since reticular pattern of canal system are 
consisting of many small to moderate sized 
channels that are scattered throughout the India 
and no Dams/ Reservoirs of high cost is 
constructed, there is no chance that the water 
occupying the living area arises. So there is no 
need to shift the people from one place to another 
place in a big way. 
170
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
3) Natural calamities may decrease in the future with the 
existence of RCS, like floods and its damage, as these 
reticular channel system may act like a better drainage 
system and the rain water may reach its final destiny 
with ease. We can utilize the required amount water and 
rest of the water we can leave in the channel and the 
natural paths to flow freely. 
171
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
4) Some of the wonders like natural reservoir 
system may be formed in the future. A depressed 
area surrounded by hill may act like a reservoir and 
this needs very little construction and maintenance 
cost and this can irrigate lot of areas around it for 
agriculture. 
172
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
5) At places waterfalls may be created 
naturally in the flow path of the water to 
such an extent that we can utilize these fall 
to create hydro electrical projects. 
173
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
6) We can supply water on required basis, 
like less irrigated and more needy areas can 
be given more water and we can drain water 
from the areas where water already exists 
more. 
174
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
7) The total storing capacity of the fresh water over the nation 
increases. If we consider that the length of the pc1is 10000kms, pc2 
is 10000kms, pc3 is 5000kms and pc4 is 5000kms.Then the total 
length of the primary channel becomes 30,000kms. If the water 
flowing size of the primary canal is 40 meters in height ร— 50 meters 
in width, then the total storing capacity becomes, 30,000kms ร— 
40mts ร— 50mts =30,000 ร— 1000 ร— 40 ร— 50 cubic meters 
=60,00,00,00,000 cubic meters = 600 cubic kilometers. This volume is 
excluding the volume of water present in the river, tributaries, short 
pcโ€™s, secondary channels, tertiary channels, quaternary channels and 
reservoirs. (They are the approximate values, it will change after the 
micro survey). 
175
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
8) Ground water level will rise with reticular pattern of channel 
system, as the total area of absorption of surface water increases 
and more water sinks in to the ground. If the total length of the 
primary channel is 30,000kms (apart from the surface area present 
as the floor of the water path ways like river, tributaries, short pcโ€™s, 
secondary channels, tertiary channels, quaternary channels and 
reservoirs for surface absorption of water) then the total area of 
surface for absorption becomes, 30,000kms ร— [40mts ร— 2 side walls 
+ 30mts floor] = 30,000 ร— 1000mts ร— 110mts =3,30,00,00,000square 
meters = 3300 square kilometers (an area with 57.44kilometers 
length and 57.44kms breadth). 
176
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
9) Rain fall also increases, as more water and surface area of water 
exposed to sunlight increases, more water vapors are generated 
and more clouds will be formed, more raining we can expect over 
the land. If the total length of the primary channel is 30,000kms 
(apart from the water surface exposed for sunlight over the surface 
of the water path ways like river, tributaries, short pcโ€™s, secondary 
channels, tertiary channels, quaternary channels and reservoirs for 
evaporation) then the total area of water surface exposed for 
sunlight becomes, 30,000kms ร— 50mts = 30,000 ร— 1000mts ร— 50mts 
=1,50,00,00,000 square meters = 1500 square kilometers (an area 
with 38.72kilometers length and 38.72kms breadth). 
177
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Note: Rain โ†’ Raise in the water level in the rivers/tributary โ†’ 
Rapid flow of water to the sea โ†’ Rapid empting of water in the 
river/tributary within few hours/days โ†’ Less time for absorption 
and evaporation โ†’ Less absorption with more utilization of 
underground will lead to lowering of underground water & less 
evaporation of the water over the land leads to decreased 
formation of clouds over the land and less raining over the land. 
The cloud formed over the sea has to fly for a long distance and 
has to fly above the western hills to reach the land of India to shed 
the rain. 
With RCS the area of absorption and evaporation increases and 
the duration of absorption and the evaporation are also increases. 
178
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
10) As we have already explained in single big 
channel system, shifting of villages and cities in a 
big way in reticular channel system will not be 
there. 
179
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
11) Only the primary channels will be 
constructed by the central government, 
secondary channels by the state government, 
tertiary channels by the district boards, 
quaternary channels by the people of VP/AA 
itself. So direct peoples participation will be 
there and the national economic burden 
decreases. The technical assistance may be 
provided by the present engineering system. 
180
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
12) The silt formed can be periodically removed 
from the primary channel and it can be used as 
manure to put over the land present above the 
level of the primary channel from where the silt 
has taken. And it may act like a good manure as it 
contain good amount of organic and inorganic 
nutrient necessary for the growth of the plants. 
181
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
13) With better water supply and with the 
participation of the people it is possible to 
convert all the thin forests in to thick forest 
by implanting use full trees in it. 
182
Topic series: 347 
Topic 30: Advantages of the reticular canal system. Thin forest: 
183
Topic series: 347 
Topic 30: Advantages of the reticular canal system. Thick forest: 
184
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
14) Most of the natural water paths 
which remains dry during most of the 
seasons, especially the rainy seasons 
can be converted in to ever flowing 
water paths as per our requirement. 
185
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Dry natural water path ways which flows only for few days in rainy 
season (Dry natural water path): 
186
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Ever flowing water pathways, which flows in all the seasons and with 
RCS, the flow in the natural water paths can be made continuous as per 
our requirement (Ever flowing water pathway). 
187
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
15) Construction of simple structures 
will do greater job in diverting the 
river water to the primary canals. 
188
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Simple barrier wall like this will work : Barrier wall Across kaveri river 
Near Danagere. Kollegal taluk, chamarajanagar district. 
189
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
The same :Barrier wall Across kaveri river Near Danagere. Kollegal taluk, 
chamarajanagar district. 
190
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
The same: Barrier wall Across kaveri river Near Danagere, Kollegal taluk, 
chamarajanagar district. 
191
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
A simple gate like this will maintain the level that we want in the 
Primary canals. kaveri river Near Danagere, Kollegal taluk, 
chamarajanagar district. 
192
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Simple gates lake this will effectivel control the flow of water in the 
primary canals. 
193
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Barrier wall Across kaveri river Near Danagere west end ea923. 
194
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Barrier wall Across kaveri river Near Danagere full view. 
195
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Barrier wall Across kaveri river Near Danagere east end. 
196
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Barrier wall Across Kaveri river Near Danagere east end canal origin with 
gate. 
197
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Barrier wall Across Kaveri river Near Danagere east end canal origin 
with gate ea695mts. 
198
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Barrier wall Across kaveri river - The canal behind danagere. 
199
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Barrier wall Across kaveri river - The canal behind danagere. 
200
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
We can release the required volume of water to the needy canals. 
201
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
16) Complications in agriculture 
due to less rain fall can be 
prevented: 
202
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
A dying tree due to dehydration. 
203
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Many trees are dying due to no irrigation: 
204
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
People have worked and waiting for the rain to come. 
205
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Seeds are implanted but many have dried in the soil. 
206
Topic series: 347 
Topic 30: Advantages of the reticular canal system. A dry well. 
207
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
This was the place from where the excess water was flowing out of the 
well a few years ago. 
208
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
After some time the entire tree will fall due to drying. Government 
will try to fill the loss, instead of thinking the methods prevent such 
types of hazards. 
209
Topic series: 347 
Topic 30: Advantages of the reticular canal system. A dry water path. 
210
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
The check dams constructed across the water paths will remain as the 
waste and will not serve its purpose. 
211
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
A plant which is suffering from dehydration from its early life will not 
give good yield. 
212
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
The entire plant physiology will alter with the leaves becoming almost 
completely dry and then getting some water at some time. 
213
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
17) RCS will fill water to all the places where it is possible to fill the 
water like this. 
214
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
18) RCS & Hydro electrical 
projects: RCS will be able to 
generate โ€˜nโ€™ number of electricity 
by providing the opportunities at 
multiple sites for hydro electrical 
projects. 
215
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Possible areas for Hydro elecrical projects-Ganga elevator-Available 
height 500 mts. 
216
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Possible areas for Hydro elecrical projects-GUT end 870 to YUC start 
800-Available height 70 mts. 
217
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Possible areas for Hydroelecrical projects-YUT end 800 to FPC1 
beginning 500-Available height 200 mts. 
218
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Possible areas for Hydroelecrical projects-FPC1 WE Bandi,Sucri, Jawai, 
Sabarmathi, Som 500 areas-Available height 50-100 mts at multiple 
places. 
219
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Possible areas for Hydroelecrical projects-FPC1 Khairi, Banas, Berach 500 
areas-Available height 50-100 mts at multiple places. 
220
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Possible areas for Hydroelecrical projects-FPC1 EE Mand Sankh 
Southkoel Subarnarekha Damodhar Rihand 500 areas-Available height 
50-100 mts at multiple places. 
221
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Possible areas for Hydroelecrical projects-FPC1 EE Mand Sankh 
Southkoel Subarnarekha Damodhar Rihand 500 areas-Available height 
50-100 mts at multiple places. 
222
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Possible areas for Hydroelecrical projects-Kaveri river elevator-Available 
height 230 mts. 
223
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Possible areas for Hydroelecrical projects-Kaveri Moyar interlinking 
path-Available height 100-200 mts. 
224
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Possible areas for Hydroelecrical projects-FPC1 Amaravathi Nangangi 
Vaigai Arjun Vaippar Chittar(End) 500 areas-Available height 100-200 
mts at multiple places. 
225
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
19) Among the many reasons for land 
inequality irrigation plays a major role, which 
can be eradicated. Depending on irrigation 
the lands are divided in to dry, semi irrigated 
and irrigated land. With RCS we can make all 
the lands as irrigated lands, and there will not 
be any terms like dry land, drought prone 
lands, and semi irrigated land. 
226
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
20) The farmers looking in to the 
sky for rain will be completely 
stopped. 
227
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
21) Many numbers of falls at many places will make the 
nature more beautiful. 
228
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Summary of advantages. 
1. Sufficient water for irrigation, industry and for domestic 
purpose. 
2. Effective drainage system for natural calamities like 
floods. 
3. Rise in ground water level, formation of streams, 
springs, natural reservoirs. 
4. Utilization of nature in the natural way โ€“ nature 
friendly- less destruction of nature. 
5. Safe even if the system breaks โ€“ electronic control of the 
system is possible. 
229
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Summary of advantages. 
6. Economical in creation โ€“ cost benefit view. 
7. Decentralization of effort in creation โ€“ easy people and 
government participation at all the levels possible. 
8. No necessity to shift villages and cities in a big way and 
thus we can avoid the problems arising with same. 
9. Total consumable land area for creation of the system is 
less. 
10. No need to construct, protect and maintain long 
bridges and big dams. 
230
Topic series: 347 
Topic 30: Advantages of the reticular canal system. 
Summary of advantages. 
11. Hydro electrical projects can be done with the water falls that 
will generate from the RCS. 
12. We can supply water on need basis. 
13. We can expect increase in the rain fall and if there is a rain fall 
any where over the system, it is possible to distribute the rain 
water to all the area below. 
14. The silt formed can be used for re soiling/ as manure. 
15. One or the other river, at one or the other point will be filling 
the RCS and thus a constant flow can be maintained in all the 
natural and artificial water path way throughout the year. 
231
Topic series: 348 
Topic 31: Disadvantages of the RCS: 
1) Road sinking: The water content in the soil may 
increase and the soil below the road may sink by the 
kinetic pressure over it and over lapping road may get 
damaged. The modern roads should be wide, well 
constructed, resistant to kinetic pressure, straight. 
The loose soil below the road should not displace on 
either the sides or the water should not diffuse below 
the road in the loose soil layer and the road should 
not sink. 
232
Topic series: 348 
Topic 31: Disadvantages of the RCS: 
A cement /mud wall with 
plastic sheet covering/ layer 
of tar (Paint of plastic/tar) is 
coated over the outer 
aspect of the wall, should 
be constructed till the firm 
soil layer. This prevents the 
water seepage below the 
road and soil sink age and 
also soil displacement 
outside the road area. The 
electrical poles, telecom 
cables should be outside 
the road (outside the wall). 
See Color atlas 36 โ€“ Picture 2: Model roads. 233
Topic series: 348 
Topic 31: Disadvantages of the RCS: 
2) Railway tract displacement: As the soil below 
the tract sinks the track may displace. Creation of 
cement wall and tar layer as mentioned earlier 
can prevent the displacement. 
234
Topic series: 348 
Topic 31: Disadvantages of the RCS: 
3) At places because of poor water flow, water 
stagnation can occur and the soil can become 
paste like and people or animal walking over it 
may sink inside the water soil paste, to prevent 
this, proper water flow pathways should be 
constructed, stagnation of water should be 
prevented. 
235
Topic series: 348 
Topic 31: Disadvantages of the RCS: 
4) To the poor houses water may seep/ooze 
from the floor and the inside humidity may 
increase, so that necessity of cement 
flooring arises for all the houses. 
236
Topic series: 348 
Topic 31: Disadvantages of the RCS: 
5) The waste water that is generated from the 
village/ factory may enter the reticular canal 
system, leading to contamination causes 
problems to the next village toward where the 
water flows. Every village should have a green 
belt all around to where these waste water 
should be flowing and trees like teak wood, rose 
wood, neem should grow in that area. 
237
Topic series: 348 
Topic 31: Disadvantages of the RCS: 
6) Some of the water born diseases like Malaria, 
cholera, enteric fever, worm infestation due to 
moist soil, diarrheas may increase if the water 
flow managements are improper. 
238
Topic series: 349 
Topic 32: Silting and erosion in natural and artificial water pathways: 
Is silting is a constant process? Is erosion is more with more rapid 
flow? 
Deposition of Solid products /Materials like mud/soil/other 
products at the undersurface / bank of the river/ water pathways 
and also in to the sea is called silting. Generation of this silt occurs 
throughout the length of flow of water, starting from the point of 
raining till it reaches the sea. When the rain drop falls on the 
earth, the water droplet strikes (thuds) on the earth, takes few 
particles of soil and other material, it mixes with it, these water 
droplets joins together carrying the material that they contain and 
start traveling. 
239
Topic series: 349 
Topic 32: Silting and erosion in natural and artificial water pathways: 
As the water travels, the force and friction created at 
the floor on which it travels and at the edges between 
which it travels takes away some more particles and 
the water becomes brown. The extent of this 
discoloration is directly proportional to the looseness 
of the soil and the amount of water friction 
development. If the soil is looser then there is more 
discoloration (The roots of the plants prevents easy 
erosion of soil by acting like miniature barriers). If 
there is more rain leading to more flow creates more 
force with more friction leads to more erosion and 
more discoloration. 240
Topic series: 349 
Topic 32: Silting and erosion in natural and artificial water pathways: 
As this water travel along its course, as the speed of the 
water flow decreases or if the flow stops / if it becomes 
stagnant, then particles with higher density settles at 
the bottom. If the settling increases on one side of the 
flow, the entire water path way, may move away from 
the area of deposition /silting and thus we may see the 
gradual change in the course of the water pathway over 
many years. Like this the silt is formed at some places. 
241
Topic series: 349 
Topic 32: Silting and erosion in natural and artificial water pathways: 
Erosion of the earth in the water flow path occurs when 
the water current takes away the particles present at the 
floor and the side wall of the water path. Ultimately when 
the river reaches the sea, all the particles will settle 
forming million tons of silt at the place, where the river 
joins the sea. 
If we look in to the composition of silt, it basically contains 
the materials present on the top layers of the soil 
especially rich in organic materials due to the fallen leaves 
and animal products (dead and degraded plant and animal 
products) along with inorganic materials like sodium, 
potassium, iodine, iron and others. 242
Topic series: 349 
Topic 32: Silting and erosion in natural and artificial water pathways: 
Now the question is if the raining is constant over a period of time 
(example over 10Years), the amount of water flow becomes the 
constant in the same given period. If the type of soil present over 
the given area is constant, then the amount of silt formation also 
becomes the constant over the constant period. If the amount of 
silt formed is constant with the constant flow of water over a 
constant period. 
This constant volume of silt formed will have different area of 
distribution with different flow dynamics with the establishment of 
RCS and this silt is accessible for reutilization as it is not going to 
reach the far place/ sea as in the natural system of water flow. 
243
Topic series: 349 
Topic 32: Silting and erosion in natural and artificial water pathways: 
The changes, that, we may see in the future with the 
establishment of the RCS are; 
1. Change in the volume of silt formation. 
The silt forming water (brown water) remains the same at the 
place where raining occurs, at the place where the rain water 
flows till it reaches the river. But the silt generation decreases in 
the river distal to the Primary canal as more water is diverted 
towards the primary channel and less water is flowing in to the 
original river with decreased flow velocity. The excess water 
reaching the sea with force decreases with decreased flow of 
water in the river, so there is decrease in amount of silt reaching 
the sea. Ultimately the total silt production in the natural river 
pathway decreases. 
244
Topic series: 349 
Topic 32: Silting and erosion in natural and artificial water pathways: 
The amount of brown water generated at the site of 
raining and in the water paths till it reaches the primary 
channel remains the same, but the flow velocity of 
water in the primary channel are less due to less flow 
gradient leading to increase in the rate of settlement of 
the particles with increase in the silt deposition in the 
primary channel. But the silt generation from the 
primary channel as such due to erosion of the primary 
channel wall and floor is going to be lessened. 
245
Topic series: 349 
Topic 32: Silting and erosion in natural and artificial water pathways: 
Comparison between the silt generation in the natural path and the 
primary channel are given here. 
Natural paths-rivers, tributaries. Primary channel. 
1. 
Wider flow with less depth 
Narrow flow with more depth as 
compared to the natural water 
path. 
2. 
Wider contact with loose soil. 
(Usually the floor and the side 
walls are made of loose soil). 
Less contact with loose soil, 
usually the side walls and the floor 
are made up of hard 
structure/rocks (e.g. size of the 
primary channel may be 20 to 30 
meter depth with 100 to 200 
meter width. 246
Topic series: 349 
Topic 32: Silting and erosion in natural and artificial water pathways: 
Comparison between the silt generation in the natural path and the 
primary channel are given here. 
Natural paths-rivers, tributaries. Primary channel. 
3. Flow velocity is variable, more 
at some places and slow at 
some places. Erosion is common 
at the place where the flow 
velocity is more (Rapid flow of 
water). Deposition / settlement 
of suspended particles with silt 
formation are more at the place 
where the flow velocity is less. 
Flow velocity is not very much 
variable in the primary channel. 
Very minimal difference may be 
seen between the site where the 
river feeds the primary channel 
and the site where it reaches the 
next feeding site and the flow 
velocity gradually decreases as it 
reaches next feeding river. 247
Topic series: 349 
Topic 32: Silting and erosion in natural and artificial water pathways: 
Comparison between the silt generation in the natural path and the 
primary channel are given here. 
Natural paths-rivers, 
tributaries. 
Primary channel. 
4. Silting and erosion is 
irregular along the course 
of the river. 
More silt depth at the place where the 
river feeds the primary channel and 
the silt depth goes on decreases till the 
primary channel reaches the next 
feeding river. The water at the site of 
entry to the primary channel contains 
the brown water and the water 
becomes clear by the time it reaches 
the next feeding river. 248
Topic series: 349 
Topic 32: Silting and erosion in natural and artificial water pathways: 
2. Change in the place of silt deposition/ distribution. 
The place of silt deposition changes with the 
establishment of RCS. The total deposition of silt 
decreases at all the water pathway. There is more 
deposition of silt at the primary channel where the river 
feeds the primary channel. The total amount of silt 
entering the sea decreases. 
Utilization of silt for re soiling. Please see the section of 
advantages of RCS. 
249
Topic series: 349 
Topic 32: Silting and erosion in natural and artificial water pathways: 
Summary of disadvantages: 
1.Road sinking / train track sinking. 
2. Water stagnation and its harmful effect. 
3. Water born diseases. 
4. Increase in humidity in poor houses. 
5. Silting, rock fall, block for flow in the canal 
system and others. 
All these disadvantage has the solution, that we 
need to do. 
250

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  • 1. Section 5: Reticular canal system for interlinking Indian rivers. Chapter 10: Reticular canal system (RCS). 3. So, what are the uses of RCS? 165
  • 2. Topic series: 347 Topic 30: Advantages of the reticular canal system. 1) Reticular pattern of canal system is more advantageous, with this, the entire India can be irrigated. All the nooks and corners of the India will get some water supply either through primary or secondary or tertiary channel system. As compared to single channel system that connects north Indian rivers with south Indian rivers the reticular pattern of canal system is more useful, cost effective and harmless. 166
  • 3. Topic series: 347 Topic 30: Advantages of the reticular canal system. It is because, the single channel system, a) Can irrigate only few areas in the nation, may be 25 - 50 kilometers on either the sides of the channel, if sub channels are created. b) At places we may have to dig very deep to make the free flow of water/it may need underground channels also. c) If natural calamities like flood occurs most of the south Indian places and cities may be affected by the flood, and can cause more damage. 167
  • 4. Topic series: 347 Topic 30: Advantages of the reticular canal system. It is because, the single channel system, d) There is an absolute necessity to protect the control system of this main channel, because evil forces may put the threat that they are going to damage the control gate. e) The expense may be very high as compared to the benefit, and it needs lot of machine and man power and local peopleโ€™s participation may be very less as it is mainly a central channel. 168
  • 5. Topic series: 347 Topic 30: Advantages of the reticular canal system. It is because, the single channel system, f) The necessity of shifting many cities/villages may be required to create one main channel. Since this channel is very wide and big, we may need to construct big bridges to connect the people on either the sides of the main canal, the need to protect this bridges from the evil forces may also arise. 169
  • 6. Topic series: 347 Topic 30: Advantages of the reticular canal system. 2) Since reticular pattern of canal system are consisting of many small to moderate sized channels that are scattered throughout the India and no Dams/ Reservoirs of high cost is constructed, there is no chance that the water occupying the living area arises. So there is no need to shift the people from one place to another place in a big way. 170
  • 7. Topic series: 347 Topic 30: Advantages of the reticular canal system. 3) Natural calamities may decrease in the future with the existence of RCS, like floods and its damage, as these reticular channel system may act like a better drainage system and the rain water may reach its final destiny with ease. We can utilize the required amount water and rest of the water we can leave in the channel and the natural paths to flow freely. 171
  • 8. Topic series: 347 Topic 30: Advantages of the reticular canal system. 4) Some of the wonders like natural reservoir system may be formed in the future. A depressed area surrounded by hill may act like a reservoir and this needs very little construction and maintenance cost and this can irrigate lot of areas around it for agriculture. 172
  • 9. Topic series: 347 Topic 30: Advantages of the reticular canal system. 5) At places waterfalls may be created naturally in the flow path of the water to such an extent that we can utilize these fall to create hydro electrical projects. 173
  • 10. Topic series: 347 Topic 30: Advantages of the reticular canal system. 6) We can supply water on required basis, like less irrigated and more needy areas can be given more water and we can drain water from the areas where water already exists more. 174
  • 11. Topic series: 347 Topic 30: Advantages of the reticular canal system. 7) The total storing capacity of the fresh water over the nation increases. If we consider that the length of the pc1is 10000kms, pc2 is 10000kms, pc3 is 5000kms and pc4 is 5000kms.Then the total length of the primary channel becomes 30,000kms. If the water flowing size of the primary canal is 40 meters in height ร— 50 meters in width, then the total storing capacity becomes, 30,000kms ร— 40mts ร— 50mts =30,000 ร— 1000 ร— 40 ร— 50 cubic meters =60,00,00,00,000 cubic meters = 600 cubic kilometers. This volume is excluding the volume of water present in the river, tributaries, short pcโ€™s, secondary channels, tertiary channels, quaternary channels and reservoirs. (They are the approximate values, it will change after the micro survey). 175
  • 12. Topic series: 347 Topic 30: Advantages of the reticular canal system. 8) Ground water level will rise with reticular pattern of channel system, as the total area of absorption of surface water increases and more water sinks in to the ground. If the total length of the primary channel is 30,000kms (apart from the surface area present as the floor of the water path ways like river, tributaries, short pcโ€™s, secondary channels, tertiary channels, quaternary channels and reservoirs for surface absorption of water) then the total area of surface for absorption becomes, 30,000kms ร— [40mts ร— 2 side walls + 30mts floor] = 30,000 ร— 1000mts ร— 110mts =3,30,00,00,000square meters = 3300 square kilometers (an area with 57.44kilometers length and 57.44kms breadth). 176
  • 13. Topic series: 347 Topic 30: Advantages of the reticular canal system. 9) Rain fall also increases, as more water and surface area of water exposed to sunlight increases, more water vapors are generated and more clouds will be formed, more raining we can expect over the land. If the total length of the primary channel is 30,000kms (apart from the water surface exposed for sunlight over the surface of the water path ways like river, tributaries, short pcโ€™s, secondary channels, tertiary channels, quaternary channels and reservoirs for evaporation) then the total area of water surface exposed for sunlight becomes, 30,000kms ร— 50mts = 30,000 ร— 1000mts ร— 50mts =1,50,00,00,000 square meters = 1500 square kilometers (an area with 38.72kilometers length and 38.72kms breadth). 177
  • 14. Topic series: 347 Topic 30: Advantages of the reticular canal system. Note: Rain โ†’ Raise in the water level in the rivers/tributary โ†’ Rapid flow of water to the sea โ†’ Rapid empting of water in the river/tributary within few hours/days โ†’ Less time for absorption and evaporation โ†’ Less absorption with more utilization of underground will lead to lowering of underground water & less evaporation of the water over the land leads to decreased formation of clouds over the land and less raining over the land. The cloud formed over the sea has to fly for a long distance and has to fly above the western hills to reach the land of India to shed the rain. With RCS the area of absorption and evaporation increases and the duration of absorption and the evaporation are also increases. 178
  • 15. Topic series: 347 Topic 30: Advantages of the reticular canal system. 10) As we have already explained in single big channel system, shifting of villages and cities in a big way in reticular channel system will not be there. 179
  • 16. Topic series: 347 Topic 30: Advantages of the reticular canal system. 11) Only the primary channels will be constructed by the central government, secondary channels by the state government, tertiary channels by the district boards, quaternary channels by the people of VP/AA itself. So direct peoples participation will be there and the national economic burden decreases. The technical assistance may be provided by the present engineering system. 180
  • 17. Topic series: 347 Topic 30: Advantages of the reticular canal system. 12) The silt formed can be periodically removed from the primary channel and it can be used as manure to put over the land present above the level of the primary channel from where the silt has taken. And it may act like a good manure as it contain good amount of organic and inorganic nutrient necessary for the growth of the plants. 181
  • 18. Topic series: 347 Topic 30: Advantages of the reticular canal system. 13) With better water supply and with the participation of the people it is possible to convert all the thin forests in to thick forest by implanting use full trees in it. 182
  • 19. Topic series: 347 Topic 30: Advantages of the reticular canal system. Thin forest: 183
  • 20. Topic series: 347 Topic 30: Advantages of the reticular canal system. Thick forest: 184
  • 21. Topic series: 347 Topic 30: Advantages of the reticular canal system. 14) Most of the natural water paths which remains dry during most of the seasons, especially the rainy seasons can be converted in to ever flowing water paths as per our requirement. 185
  • 22. Topic series: 347 Topic 30: Advantages of the reticular canal system. Dry natural water path ways which flows only for few days in rainy season (Dry natural water path): 186
  • 23. Topic series: 347 Topic 30: Advantages of the reticular canal system. Ever flowing water pathways, which flows in all the seasons and with RCS, the flow in the natural water paths can be made continuous as per our requirement (Ever flowing water pathway). 187
  • 24. Topic series: 347 Topic 30: Advantages of the reticular canal system. 15) Construction of simple structures will do greater job in diverting the river water to the primary canals. 188
  • 25. Topic series: 347 Topic 30: Advantages of the reticular canal system. Simple barrier wall like this will work : Barrier wall Across kaveri river Near Danagere. Kollegal taluk, chamarajanagar district. 189
  • 26. Topic series: 347 Topic 30: Advantages of the reticular canal system. The same :Barrier wall Across kaveri river Near Danagere. Kollegal taluk, chamarajanagar district. 190
  • 27. Topic series: 347 Topic 30: Advantages of the reticular canal system. The same: Barrier wall Across kaveri river Near Danagere, Kollegal taluk, chamarajanagar district. 191
  • 28. Topic series: 347 Topic 30: Advantages of the reticular canal system. A simple gate like this will maintain the level that we want in the Primary canals. kaveri river Near Danagere, Kollegal taluk, chamarajanagar district. 192
  • 29. Topic series: 347 Topic 30: Advantages of the reticular canal system. Simple gates lake this will effectivel control the flow of water in the primary canals. 193
  • 30. Topic series: 347 Topic 30: Advantages of the reticular canal system. Barrier wall Across kaveri river Near Danagere west end ea923. 194
  • 31. Topic series: 347 Topic 30: Advantages of the reticular canal system. Barrier wall Across kaveri river Near Danagere full view. 195
  • 32. Topic series: 347 Topic 30: Advantages of the reticular canal system. Barrier wall Across kaveri river Near Danagere east end. 196
  • 33. Topic series: 347 Topic 30: Advantages of the reticular canal system. Barrier wall Across Kaveri river Near Danagere east end canal origin with gate. 197
  • 34. Topic series: 347 Topic 30: Advantages of the reticular canal system. Barrier wall Across Kaveri river Near Danagere east end canal origin with gate ea695mts. 198
  • 35. Topic series: 347 Topic 30: Advantages of the reticular canal system. Barrier wall Across kaveri river - The canal behind danagere. 199
  • 36. Topic series: 347 Topic 30: Advantages of the reticular canal system. Barrier wall Across kaveri river - The canal behind danagere. 200
  • 37. Topic series: 347 Topic 30: Advantages of the reticular canal system. We can release the required volume of water to the needy canals. 201
  • 38. Topic series: 347 Topic 30: Advantages of the reticular canal system. 16) Complications in agriculture due to less rain fall can be prevented: 202
  • 39. Topic series: 347 Topic 30: Advantages of the reticular canal system. A dying tree due to dehydration. 203
  • 40. Topic series: 347 Topic 30: Advantages of the reticular canal system. Many trees are dying due to no irrigation: 204
  • 41. Topic series: 347 Topic 30: Advantages of the reticular canal system. People have worked and waiting for the rain to come. 205
  • 42. Topic series: 347 Topic 30: Advantages of the reticular canal system. Seeds are implanted but many have dried in the soil. 206
  • 43. Topic series: 347 Topic 30: Advantages of the reticular canal system. A dry well. 207
  • 44. Topic series: 347 Topic 30: Advantages of the reticular canal system. This was the place from where the excess water was flowing out of the well a few years ago. 208
  • 45. Topic series: 347 Topic 30: Advantages of the reticular canal system. After some time the entire tree will fall due to drying. Government will try to fill the loss, instead of thinking the methods prevent such types of hazards. 209
  • 46. Topic series: 347 Topic 30: Advantages of the reticular canal system. A dry water path. 210
  • 47. Topic series: 347 Topic 30: Advantages of the reticular canal system. The check dams constructed across the water paths will remain as the waste and will not serve its purpose. 211
  • 48. Topic series: 347 Topic 30: Advantages of the reticular canal system. A plant which is suffering from dehydration from its early life will not give good yield. 212
  • 49. Topic series: 347 Topic 30: Advantages of the reticular canal system. The entire plant physiology will alter with the leaves becoming almost completely dry and then getting some water at some time. 213
  • 50. Topic series: 347 Topic 30: Advantages of the reticular canal system. 17) RCS will fill water to all the places where it is possible to fill the water like this. 214
  • 51. Topic series: 347 Topic 30: Advantages of the reticular canal system. 18) RCS & Hydro electrical projects: RCS will be able to generate โ€˜nโ€™ number of electricity by providing the opportunities at multiple sites for hydro electrical projects. 215
  • 52. Topic series: 347 Topic 30: Advantages of the reticular canal system. Possible areas for Hydro elecrical projects-Ganga elevator-Available height 500 mts. 216
  • 53. Topic series: 347 Topic 30: Advantages of the reticular canal system. Possible areas for Hydro elecrical projects-GUT end 870 to YUC start 800-Available height 70 mts. 217
  • 54. Topic series: 347 Topic 30: Advantages of the reticular canal system. Possible areas for Hydroelecrical projects-YUT end 800 to FPC1 beginning 500-Available height 200 mts. 218
  • 55. Topic series: 347 Topic 30: Advantages of the reticular canal system. Possible areas for Hydroelecrical projects-FPC1 WE Bandi,Sucri, Jawai, Sabarmathi, Som 500 areas-Available height 50-100 mts at multiple places. 219
  • 56. Topic series: 347 Topic 30: Advantages of the reticular canal system. Possible areas for Hydroelecrical projects-FPC1 Khairi, Banas, Berach 500 areas-Available height 50-100 mts at multiple places. 220
  • 57. Topic series: 347 Topic 30: Advantages of the reticular canal system. Possible areas for Hydroelecrical projects-FPC1 EE Mand Sankh Southkoel Subarnarekha Damodhar Rihand 500 areas-Available height 50-100 mts at multiple places. 221
  • 58. Topic series: 347 Topic 30: Advantages of the reticular canal system. Possible areas for Hydroelecrical projects-FPC1 EE Mand Sankh Southkoel Subarnarekha Damodhar Rihand 500 areas-Available height 50-100 mts at multiple places. 222
  • 59. Topic series: 347 Topic 30: Advantages of the reticular canal system. Possible areas for Hydroelecrical projects-Kaveri river elevator-Available height 230 mts. 223
  • 60. Topic series: 347 Topic 30: Advantages of the reticular canal system. Possible areas for Hydroelecrical projects-Kaveri Moyar interlinking path-Available height 100-200 mts. 224
  • 61. Topic series: 347 Topic 30: Advantages of the reticular canal system. Possible areas for Hydroelecrical projects-FPC1 Amaravathi Nangangi Vaigai Arjun Vaippar Chittar(End) 500 areas-Available height 100-200 mts at multiple places. 225
  • 62. Topic series: 347 Topic 30: Advantages of the reticular canal system. 19) Among the many reasons for land inequality irrigation plays a major role, which can be eradicated. Depending on irrigation the lands are divided in to dry, semi irrigated and irrigated land. With RCS we can make all the lands as irrigated lands, and there will not be any terms like dry land, drought prone lands, and semi irrigated land. 226
  • 63. Topic series: 347 Topic 30: Advantages of the reticular canal system. 20) The farmers looking in to the sky for rain will be completely stopped. 227
  • 64. Topic series: 347 Topic 30: Advantages of the reticular canal system. 21) Many numbers of falls at many places will make the nature more beautiful. 228
  • 65. Topic series: 347 Topic 30: Advantages of the reticular canal system. Summary of advantages. 1. Sufficient water for irrigation, industry and for domestic purpose. 2. Effective drainage system for natural calamities like floods. 3. Rise in ground water level, formation of streams, springs, natural reservoirs. 4. Utilization of nature in the natural way โ€“ nature friendly- less destruction of nature. 5. Safe even if the system breaks โ€“ electronic control of the system is possible. 229
  • 66. Topic series: 347 Topic 30: Advantages of the reticular canal system. Summary of advantages. 6. Economical in creation โ€“ cost benefit view. 7. Decentralization of effort in creation โ€“ easy people and government participation at all the levels possible. 8. No necessity to shift villages and cities in a big way and thus we can avoid the problems arising with same. 9. Total consumable land area for creation of the system is less. 10. No need to construct, protect and maintain long bridges and big dams. 230
  • 67. Topic series: 347 Topic 30: Advantages of the reticular canal system. Summary of advantages. 11. Hydro electrical projects can be done with the water falls that will generate from the RCS. 12. We can supply water on need basis. 13. We can expect increase in the rain fall and if there is a rain fall any where over the system, it is possible to distribute the rain water to all the area below. 14. The silt formed can be used for re soiling/ as manure. 15. One or the other river, at one or the other point will be filling the RCS and thus a constant flow can be maintained in all the natural and artificial water path way throughout the year. 231
  • 68. Topic series: 348 Topic 31: Disadvantages of the RCS: 1) Road sinking: The water content in the soil may increase and the soil below the road may sink by the kinetic pressure over it and over lapping road may get damaged. The modern roads should be wide, well constructed, resistant to kinetic pressure, straight. The loose soil below the road should not displace on either the sides or the water should not diffuse below the road in the loose soil layer and the road should not sink. 232
  • 69. Topic series: 348 Topic 31: Disadvantages of the RCS: A cement /mud wall with plastic sheet covering/ layer of tar (Paint of plastic/tar) is coated over the outer aspect of the wall, should be constructed till the firm soil layer. This prevents the water seepage below the road and soil sink age and also soil displacement outside the road area. The electrical poles, telecom cables should be outside the road (outside the wall). See Color atlas 36 โ€“ Picture 2: Model roads. 233
  • 70. Topic series: 348 Topic 31: Disadvantages of the RCS: 2) Railway tract displacement: As the soil below the tract sinks the track may displace. Creation of cement wall and tar layer as mentioned earlier can prevent the displacement. 234
  • 71. Topic series: 348 Topic 31: Disadvantages of the RCS: 3) At places because of poor water flow, water stagnation can occur and the soil can become paste like and people or animal walking over it may sink inside the water soil paste, to prevent this, proper water flow pathways should be constructed, stagnation of water should be prevented. 235
  • 72. Topic series: 348 Topic 31: Disadvantages of the RCS: 4) To the poor houses water may seep/ooze from the floor and the inside humidity may increase, so that necessity of cement flooring arises for all the houses. 236
  • 73. Topic series: 348 Topic 31: Disadvantages of the RCS: 5) The waste water that is generated from the village/ factory may enter the reticular canal system, leading to contamination causes problems to the next village toward where the water flows. Every village should have a green belt all around to where these waste water should be flowing and trees like teak wood, rose wood, neem should grow in that area. 237
  • 74. Topic series: 348 Topic 31: Disadvantages of the RCS: 6) Some of the water born diseases like Malaria, cholera, enteric fever, worm infestation due to moist soil, diarrheas may increase if the water flow managements are improper. 238
  • 75. Topic series: 349 Topic 32: Silting and erosion in natural and artificial water pathways: Is silting is a constant process? Is erosion is more with more rapid flow? Deposition of Solid products /Materials like mud/soil/other products at the undersurface / bank of the river/ water pathways and also in to the sea is called silting. Generation of this silt occurs throughout the length of flow of water, starting from the point of raining till it reaches the sea. When the rain drop falls on the earth, the water droplet strikes (thuds) on the earth, takes few particles of soil and other material, it mixes with it, these water droplets joins together carrying the material that they contain and start traveling. 239
  • 76. Topic series: 349 Topic 32: Silting and erosion in natural and artificial water pathways: As the water travels, the force and friction created at the floor on which it travels and at the edges between which it travels takes away some more particles and the water becomes brown. The extent of this discoloration is directly proportional to the looseness of the soil and the amount of water friction development. If the soil is looser then there is more discoloration (The roots of the plants prevents easy erosion of soil by acting like miniature barriers). If there is more rain leading to more flow creates more force with more friction leads to more erosion and more discoloration. 240
  • 77. Topic series: 349 Topic 32: Silting and erosion in natural and artificial water pathways: As this water travel along its course, as the speed of the water flow decreases or if the flow stops / if it becomes stagnant, then particles with higher density settles at the bottom. If the settling increases on one side of the flow, the entire water path way, may move away from the area of deposition /silting and thus we may see the gradual change in the course of the water pathway over many years. Like this the silt is formed at some places. 241
  • 78. Topic series: 349 Topic 32: Silting and erosion in natural and artificial water pathways: Erosion of the earth in the water flow path occurs when the water current takes away the particles present at the floor and the side wall of the water path. Ultimately when the river reaches the sea, all the particles will settle forming million tons of silt at the place, where the river joins the sea. If we look in to the composition of silt, it basically contains the materials present on the top layers of the soil especially rich in organic materials due to the fallen leaves and animal products (dead and degraded plant and animal products) along with inorganic materials like sodium, potassium, iodine, iron and others. 242
  • 79. Topic series: 349 Topic 32: Silting and erosion in natural and artificial water pathways: Now the question is if the raining is constant over a period of time (example over 10Years), the amount of water flow becomes the constant in the same given period. If the type of soil present over the given area is constant, then the amount of silt formation also becomes the constant over the constant period. If the amount of silt formed is constant with the constant flow of water over a constant period. This constant volume of silt formed will have different area of distribution with different flow dynamics with the establishment of RCS and this silt is accessible for reutilization as it is not going to reach the far place/ sea as in the natural system of water flow. 243
  • 80. Topic series: 349 Topic 32: Silting and erosion in natural and artificial water pathways: The changes, that, we may see in the future with the establishment of the RCS are; 1. Change in the volume of silt formation. The silt forming water (brown water) remains the same at the place where raining occurs, at the place where the rain water flows till it reaches the river. But the silt generation decreases in the river distal to the Primary canal as more water is diverted towards the primary channel and less water is flowing in to the original river with decreased flow velocity. The excess water reaching the sea with force decreases with decreased flow of water in the river, so there is decrease in amount of silt reaching the sea. Ultimately the total silt production in the natural river pathway decreases. 244
  • 81. Topic series: 349 Topic 32: Silting and erosion in natural and artificial water pathways: The amount of brown water generated at the site of raining and in the water paths till it reaches the primary channel remains the same, but the flow velocity of water in the primary channel are less due to less flow gradient leading to increase in the rate of settlement of the particles with increase in the silt deposition in the primary channel. But the silt generation from the primary channel as such due to erosion of the primary channel wall and floor is going to be lessened. 245
  • 82. Topic series: 349 Topic 32: Silting and erosion in natural and artificial water pathways: Comparison between the silt generation in the natural path and the primary channel are given here. Natural paths-rivers, tributaries. Primary channel. 1. Wider flow with less depth Narrow flow with more depth as compared to the natural water path. 2. Wider contact with loose soil. (Usually the floor and the side walls are made of loose soil). Less contact with loose soil, usually the side walls and the floor are made up of hard structure/rocks (e.g. size of the primary channel may be 20 to 30 meter depth with 100 to 200 meter width. 246
  • 83. Topic series: 349 Topic 32: Silting and erosion in natural and artificial water pathways: Comparison between the silt generation in the natural path and the primary channel are given here. Natural paths-rivers, tributaries. Primary channel. 3. Flow velocity is variable, more at some places and slow at some places. Erosion is common at the place where the flow velocity is more (Rapid flow of water). Deposition / settlement of suspended particles with silt formation are more at the place where the flow velocity is less. Flow velocity is not very much variable in the primary channel. Very minimal difference may be seen between the site where the river feeds the primary channel and the site where it reaches the next feeding site and the flow velocity gradually decreases as it reaches next feeding river. 247
  • 84. Topic series: 349 Topic 32: Silting and erosion in natural and artificial water pathways: Comparison between the silt generation in the natural path and the primary channel are given here. Natural paths-rivers, tributaries. Primary channel. 4. Silting and erosion is irregular along the course of the river. More silt depth at the place where the river feeds the primary channel and the silt depth goes on decreases till the primary channel reaches the next feeding river. The water at the site of entry to the primary channel contains the brown water and the water becomes clear by the time it reaches the next feeding river. 248
  • 85. Topic series: 349 Topic 32: Silting and erosion in natural and artificial water pathways: 2. Change in the place of silt deposition/ distribution. The place of silt deposition changes with the establishment of RCS. The total deposition of silt decreases at all the water pathway. There is more deposition of silt at the primary channel where the river feeds the primary channel. The total amount of silt entering the sea decreases. Utilization of silt for re soiling. Please see the section of advantages of RCS. 249
  • 86. Topic series: 349 Topic 32: Silting and erosion in natural and artificial water pathways: Summary of disadvantages: 1.Road sinking / train track sinking. 2. Water stagnation and its harmful effect. 3. Water born diseases. 4. Increase in humidity in poor houses. 5. Silting, rock fall, block for flow in the canal system and others. All these disadvantage has the solution, that we need to do. 250