This document summarizes the design, construction, operation, and assessment of a water storage tank in District Kalat, Balochistan. It describes how the tank was designed based on the tube well discharge of 10 liters per second and operating hours of 10 hours per day. The recommended tank dimensions were 17m x 17m x 1.37m. The construction process involved clearing the site, excavation, and building the walls out of brick with concrete reinforcement. The water stored during night hours in the tank was then beneficially utilized for 6 hours of irrigation each morning, allowing more of the command area to be irrigated than possible without the storage tank.
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Necessity and scope of irrigation
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Soil-water plant relationship and Type of soil
Water requirements of crop and its Important terminology
Duty delta and base period and Irrigation efficiencies
Method of measuring irrigation water
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This presentation gives an overview on how to design effective rainwater harvesting systems based on the underlying rock structure and hydrogeology of an area.
Introduction
Necessity and scope of irrigation
Engineering - benefits and ill effects of irrigation
Irrigation development in India
Classification and types of irrigation systems
Soil-water plant relationship and Type of soil
Water requirements of crop and its Important terminology
Duty delta and base period and Irrigation efficiencies
Method of measuring irrigation water
References
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irrigation water management deals with various management aspects such as canal management, designing irrigation systems, irrigation efficiency, scheduling and water quaility etc.
Integrated watershed management programme at gunjala village – a case studyeSAT Journals
Abstract Integrated watershed management programme was launched in Tamsi mandal of gunjala village by using ‘Four water Concept’. Case study included Questionnaire survey from farmers living in that village, and continuous study over a period of two years. Tamsi village is a tribal village and drought area with very less rainfall. Total project area is 4566 Hac, Project Cost Rs. 547.92 Lakhs. The sanctioned area of Gunjala micro watershed is 710 Hac with a outlay of Rs. 85.20 Lakhs. Out of which the total expenditure incurred was Rs.39.12 Lakhs and constructed structures were LBS, RFDs, PTs, CDs and Plantation. Over two year period, it was observed that, 2 years of period the ground water has been improved in this village and three Bore wells are drilled and they are successful, even during peak summer they could meet their day today activities. The farmer Jadhav Uttam has an additional income of Rs. 17600 per Acre in cotton and Rs. 6300 per Acre in Red Gram. The farmer Gnan Singh had an additional income of Rs. 17600 per Acre in cotton and Rs. 5,250 per Acre in Red Gram. The farmer Amber Singh had an additional income of Rs. 13200 per Acre in cotton and Rs. 3,500 per Acre in Red Gram. In the same way, others farmers were also able to generate the benefits from the construction of water storage structures. Total Additional income generated for Seven farmers was Rs. 6, 31000/- in 2011-2012 Cropping Season with construction of Check Dams of Rs.3,24000/- an additional average income per Acre to the farmer is of Rs. 22,500/- and a series of 8 Nos. check dams are constructed on single 3rd order stream which flows Across the 6 Grama Panchayats from ridge to valley. There are 90 farmers cultivating 168 Acre of land who are benefited by getting an additional income of Rs.37,80,000/-. Keywords: Four water Concept, micro watershed, LBS, RFDs, PTs, CDs and Plantation
Rain water harvesting is a technique of collection and storage of rainwater into natural reservoirs or tanks, or the infiltration of surface water into subsurface aquifers (before it is lost as surface runoff). One method of rainwater harvesting is rooftop harvesting
An experimental investigation was conducted to investigate the behavior of ultra-high strength reactive concrete (RPC) columns before and after strengthening with carbon fiber reinforced polymer (CFRP) sheets jacketing under eccentric axi al load. Twelve columns were tested up to failure, strengthened and retested to examine strengthening efficiency and to evaluate the effects of variation of the concrete type (normal or RPC), presence of steel fibers and main steel reinforcement ratio. Experimental results showed that CFRP jacketing increases the ultimate failure load of strengthened columns up to 185%, highly stiffens them (reduces lateral displacements) and allow more ductile failure than the original columns. Also, inclusion of steel fibers in RPC columns increases failure loads up to 86%, prevents palling of the concrete cover and increase the ductility.
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A case study on water storage tank design, constrution, operation and assessment in district kalat, balochistan
1. Civil and Environmental Research www.iiste.org
ISSN 2224-5790 (Paper) ISSN 2225-0514 (Online)
Vol.6, No.4, 2014
81
A Case Study on Water Storage Tank Design, Constrution,
Operation and Assessment in District Kalat, Balochistan
Farid Akbar1
, Gul Daraz Khan1
, Shahbaz Khan2
, Muzaffar Ahmed2
and Shamsuddin2
1.Department of Water Management, Faculty of Crop Production Sciences, The Agricultural University
Peshawar
2.Faculty of Water Resources Management, Lasbela University of Agriculture, Water and Marine Sciences
Uthal, District Lasbela
Corresponding Author Email: farid.baloch@hotmail.com
Abstract
Balochistan has been blessed with all types of ecological zones; the only limited factor is water. Also grow more
food by each drop of water is the cry of the day. For this it is utmost important to take maximum discharge from
already design structures. In Balochistan there is no irrigation at night and tubewell is operating full night whose
discharge were wasted and Electricity load shedding problems are also there especially at day time. For this a
storage tank is required which stores water for further utilization at day time irrigation hours. For the design of
storage tank the tube well discharge ,its operating hours and other parameters were assessed. Discharge of tube
well was determined by using trajectory method which was 10 lps. Ten hours were taken as operating hours The
construction of the water storage tank involves different steps that are removal of vegetation from the design area,
land leveling, materials selection which included water, cement, sand and gravel.. The recommended Tank
dimension (Length X Width X Height of 17m X 17m X 1.37m) for scheme incorporated. Tank is backfilled with
near by soil. The water stored during night is most beneficially utilized for 6 hr since morning for the command
area at the tail of the water course instead of design discharge of tube well of 10 LPS (during day time) for the
whole area which was not possible otherwise.
Keywords: Storage Tank, Design, Construction, Discharge, Cost Benefit Ratio
INTRODUCTION
Pakistan is an agricultural country, which having approximately 20 millions hectares of land reserved for
agriculture out of 88 million hectares. Due to the expansion in the population, the water demand has drastically
increased. So, it is needed to conserve water for the increasing demand of the agriculture by minimizing the
water loses as much as possible to meet the crop water requirement in the country. The area is characterized by
arid climate predominantly. Most of the areas receives only 150 mm rainfall annually, mostly in winter season
when it is not much needed because plants are in dormant condition. It is painful to observe that despite the acute
scarcity of this natural resource, it is being squandered at field level. To curtail this criminal wastage of irrigation
water, improved water management practices need to be promoted such as lining of watercourses, construction
of water storage tanks and provision of off take/check structures. The tank storage structure is the only water
source to store rainwater and help farmers through crop growing period and provide stability to agricultural
production. The under-development, stagnation and even decline of paddy agriculture during recent years in this
region are usually attributed to the constraints in tank water supply. Whatever the shortcomings at their creation,
existing irrigation tanks remain an asset to the sustainability of irrigated agriculture. (Anbumozhi et.al 2001).
Tanks are small reservoirs they represent an important water resource for people, crops, livestock and fish.
Considerable efforts have been made to rehabilitate tank irrigation systems in recent decades, but there have
been few studies carried out to improve understanding of their hydrology. This paper presents a daily water
balance approach, which aims to simulate the dynamic behaviour of tank storage. (Li and Gowing,2009). New
investment in major irrigation which is difficult due to the high cost of big projects including the electricity as a
constraint for large scale irrigation. Hence emphasis should be placed on modernizing the small irrigation
systems such as tanks. To select tanks for modernization, factors that influence the performance of an irrigation
tank were identified using a multiple linear regression model. Those factors that significantly influence the
performance of a tank were used to formulate a tank modernization index.( Balasubramanian and Govindasam
1991).
MATERIALS AND METHODS
Apple was a major income earning for him. Source of irrigation was deep tube well of 50 Hp generated by
electricity. The diameter of tube well pipe was 4 Inches and discharge was 10 ls-1
. The design include the water
supply, size of the tank and the materials estimation verification. Most important consideration is the quantity of
inflow for which the basic parameters are capacity of source (Tube well, Spring) and the operating hours of the
scheme were calculated before designing. Size of the tank is designed according the total daily volume available
as per crop water requirements.Construction of water storage tank is executed according to the standard
2. Civil and Environmental Research
ISSN 2224-5790 (Paper) ISSN 2225-0514 (Online)
Vol.6, No.4, 2014
parameters stage wise. The site is thoroughly cleared of vegetation. All trees, shrubs and other growth are
removed and their roots dug out. The site then is excavated down to the foundation level and the surface leveled.
RESULTS AND DISCUSSION
Discharge
The discharge of the tube well in study site was calculated by trajectory method. The calculations from the
method are given below. As the estimated value comes out to be 9.48 l s
10 l s -1
for safe design purposes.
Area to be irrigated
The annual requirements for the apple trees on 28 ha needs 84000 m
of the cropped area irrigated from the whole command. In the existing scheme only 8 hectares were irrigated and
rest of the land was not possible to be irrigated due to unavailability of water from the source. Due to lining of
the storage tank, the area has increased to 18 ha in water stored.
Size of tank
For size of tank we need parameters operating hours which are 10 hour
Tank Size = √ 360/1.37
= 16.21m
Hence a size having dimensions of 17 x 17 x 1.37 is recommended for the tank
Design of Water storage tank.
While designing a tank the following
Design of walls
Floor and foundation design
Inlet
Outlet
Table 1. Dimensions of Water Storage Tank
Length of Water Storage Tank
Width of Water Storage Tank
Add: Thickness of floor under walls
Figure 1.Design Of Water
Design of walls
The most common construction material for the walls is brick. The design consideration for both bricks and PCC
0514 (Online)
82
ise. The site is thoroughly cleared of vegetation. All trees, shrubs and other growth are
removed and their roots dug out. The site then is excavated down to the foundation level and the surface leveled.
The discharge of the tube well in study site was calculated by trajectory method. The calculations from the
method are given below. As the estimated value comes out to be 9.48 l s -1
hence it is recommended to take it as
The annual requirements for the apple trees on 28 ha needs 84000 m3
of water. The calculation is based on 40 %
of the cropped area irrigated from the whole command. In the existing scheme only 8 hectares were irrigated and
e land was not possible to be irrigated due to unavailability of water from the source. Due to lining of
the storage tank, the area has increased to 18 ha in water stored.
For size of tank we need parameters operating hours which are 10 hours. Volume = 10 x 10 x 3.6 = 360 m
Hence a size having dimensions of 17 x 17 x 1.37 is recommended for the tank
While designing a tank the following steps should be taken in consideration which include the
Table 1. Dimensions of Water Storage Tank
Length of Water Storage Tank 17m
Width of Water Storage Tank 17m
Height of WST 1.37m
Thickness of plaster 0.01m
Thickness of floor 0.15m
Width Height
Add: Thickness of floor under walls 0.89 0.1
1st step of walls 0.59 0.32
2nd
step of walls 0.47 0.32
3rd step of walls 0.35 0.32
4th step of walls 0.23 0.41
Figure 1.Design Of Water Storage Tank.
The most common construction material for the walls is brick. The design consideration for both bricks and PCC
www.iiste.org
ise. The site is thoroughly cleared of vegetation. All trees, shrubs and other growth are
removed and their roots dug out. The site then is excavated down to the foundation level and the surface leveled.
The discharge of the tube well in study site was calculated by trajectory method. The calculations from the
hence it is recommended to take it as
of water. The calculation is based on 40 %
of the cropped area irrigated from the whole command. In the existing scheme only 8 hectares were irrigated and
e land was not possible to be irrigated due to unavailability of water from the source. Due to lining of
Volume = 10 x 10 x 3.6 = 360 m3
steps should be taken in consideration which include the
The most common construction material for the walls is brick. The design consideration for both bricks and PCC
3. Civil and Environmental Research www.iiste.org
ISSN 2224-5790 (Paper) ISSN 2225-0514 (Online)
Vol.6, No.4, 2014
83
has little difference.
The walls of the tank could be subjected to three loading conditions:
Pressure from the water inside the tank;
Pressure from the earthen backfill on the outside of the tank; and
Other temporary loading conditions including earthquake loading.
Quantity Estimation of Water Storage Tank
The calculations of these quantities are based on the following assumptions:
Bricks of a standard size 230 mm x 110 mm x 70 mm have been used.
All concrete is 1:3:6 mix.
All mortar and plaster is 1:4 mix.
These calculations do not include allowances for losses (wastages). Losses can vary considerably from place to
place and the given situation and /or conditions in which the construction takes place.
CONSTRUCTION OF STORAGE TANKS
As for as construction of water storage tank is concerned it is the most complex procedure which was carried out
in following steps.
Arranging and preparation of construction material.
Preparation of proposed site for construction.
Lying of bed and concrete foundation.
Construction of Walls.
Construction of outlet box.
Plaster of Wall
Table 2 Estimate of Material
1 P.C.C (1:3:6)
Volume V1 55.921 m3
Cement = V1x0.42 234.87 Bags
Sand = V1x0.46 25.72 m3
Gravel = V1x0.92 51.45 m3
2 Brick Masonry (1:4)
Volume V2 38.375 m3
Ingredients
Cement = V2x0.23x8.96 79.08 m3
Sand = V2x0.23x1.26 11.12 m3
Brick = V2x450 17268.75 m3
3 Plaster (1:4)
Volume V3 1.56 m3
Ingredients
Cement = V3x8.96 13.97 Bags
Sand = V3x1.26 1.96 m3
Cost and Benefit ratio of Water Storage Tankl cost of tank
The total cost per unit capacity of the tank for various sizes (capacity). High costs, up to Rs 3.4 m was found for
tank having a capacity below 400 m3
. This cost increases when the size of tank increases. It is because of the
decrease in lining cost due to the reduction in wetted area relative to the increase in excavation cost per unit
volume due to the increases surface area of land.
Conclusions
Operating tube well for almost 10 hours in the night time when there is no load shedding. The storage tank is
filled to its freeboard level which is utilized during day time when electricity is off. Constructed storage tank
decreased up to 30% water losses when compared to a earthen water storage tank. With the construction of water
storage tanks, even very small quantities of water can be used which was not possible by direct pumping to the
field due to more advance time & higher losses. Due to Electricity fluctuation and some time without power
supply for couple of days it is more easy to utilize stored water to the field than directly supply.By providing
water storage tanks, the farming communities would be able to use the stored water according to their needs.
Whereas lining of water storage tank has saved water losses (~30%) hence lining of water courses will do more.
References
Anbumozhi. et.al. 2001. Towards improved performance of irrigation tanks in semi-arid regions of India:
4. Civil and Environmental Research www.iiste.org
ISSN 2224-5790 (Paper) ISSN 2225-0514 (Online)
Vol.6, No.4, 2014
84
Modernization opportunities and challenges. Irrigation Drainage Systems. 15(4): 293-309.
Baker. et.al. 2009. Adaptive Water Quantity Management: Designing for Sustainability and Resiliency in Water
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Balasubramanian et.al. 1991. Ranking irrigation tanks for Modernization. Agricultural Water Management.
Tamil Nadu Agricultural University, Coimbatoire, Tamil Nadu, India.Department of Economics, Iowa
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Department of Agricultural Economics, International Rice Research Institute, PO Box 933, Manila,
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USDA, Soil Conservation Service. 1972. National Engineering Handbook. Hydrology Section 4: Chapters 4-10,
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Verma. et.al. 1990. Design of storage tanks for water harvesting in Rain fed Areas. Agricultural Water
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Watt, S. B. 1978. Concrete tanks, Design and Construction. Ferro cement water Tanks and their construction.
Intermediate Technology Publications. London. 36. 116-118.
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