Rainwater harvesting methods/ process/ Types and the component of the rainwater harvesting as well as some fact and comparison element about rainwater harvesting

1. Department of civil
engineering

2. RAINWATERHARVESTING
RABINDRA CHAUDHARY
Regd. No.:-170020116
(Department of Civil)
Under by
Mr K.J Brahmachari
Mr K. Hemantha Raja

3. This presentation deals with
 Introductions
 Importance and Goals
 Component RWH
 Types of RWH system
 Advantage
 Conclusion

4. Introductions
 Ground ⇨30%
 Water ⇨70% ⇨
⇩
⇨Salt water =97.5%
⇨Fresh water=2.5%
⇩
# Ground water is 25.6%
# Lake/ river is 0.4%
# Ice caps is 74%

5. Rainwater harvesting
[RWH]
• Itis a type of water harvesting.
• It can be defined as the system of collection
and concentration of rain water and its run
off and its productive use for :-
a) Irrigation of annual crops pastures and trees.
b) Domestic and livestock consumption.
c) Groundwater recharge.

6. Uses of rain water
 Recharge under groundwater
 Gardening
 Livestock
 Drinking purpose
 for irrigation purpose

7. RainWater
Harvesting?.• Hydrological Cycle

8. Some Facts about Water
• Only 2.5%of the world’s water is freshwater and most of this are
in the form of polar ice-caps.
• Water use has increased by 70%since 1970
• Arecent report by Credit Suisse stated that by 2025 18 countries
will experience water demand beyond supply capabilities
• It takes up to 5000 lt of water to produce 1kg ofrice.
• Every square mile of developed land causes 16 million gallonsof
rain water to directly enter the rivers on a rainyday!
• Each person uses about 150 litres of water every day. About60
litres of this is for toilet flushing
• Toilet flushing is the single largest user of household water, 30-
40%,up to 90%for offices.

9. Use of water in
particular area

10. Water Consumption
1
9 8 .6
1 .3 1 .4
9 2 .4
6 .2 5
8 6
9
1 0
0
9 0
8 0
7 0
6 0
5 0
4 0
3 0
2 0
1 0
0
Percentage
1 9 6 1 2 0 0 5 2 0 2 1
Industry Agriculture D o m e s t ic

12. Components of RWH
Catchment
Delivery
Storage

13. .ppt (8)
1 Roof
2 Screen
3 Discharge of water
Raw water
tank or
Aquifer
1
2
3
4
5
6
7
4 Pre-filter
5 Storage tank
6 Flow meter
7 Storm water discharge
Rain Water as Source Water
Design Considerations
Typical Diagram Recomendation

15. Roof catchment system

18. Rock catchment system

20. Ground catchment system

21.  These are commonly used filters, constructed by
brick masonry and filleted by pebbles, gravel,and
sand as shown in the figure. Each layer should be
separated by wiremesh.
Sand Gravel Filter

22. Check and sand dams hafis

24. Conclusion

25. Why do people harvest rainwater?
•Rainswater is a precious resourcedue to increases in
demand from our evergrowing population. Changes in
rainfall patterns in the UK haveseen bothdrought
conditions and flooding
• Rainwater harvesting can providearound 50 percent
of a family’s waterneeds.
• This notonlysaveswater, butsaves moneyand
reducesour impacton theenvironment.
 Toinculcateacultureof waterconservation
 Toreduce soilerosion

26. Thank you for your
attention