2. Rain water harvesting is the collection and
storage of rain ,rather than allowing it to run
off
As we all know that water is essential for all plant, animal and eco system. It is
unlimited, to many of us think so, but in reality
• Fresh water is finite,
• Rapidly becomes scanty.
• One best way of conserve is judicious use of water. So water conservation is a key
strategy,
-with changing rainfall pattern.
- Farmer and government are looking for traditional system of water harvesting in
different agroclimatic zone.
-provide sustainable and effective of water management
-improve economic activity ,
4. Technique of rain water harvest:
1. Run off water harvesting
a)Short tern storage
b)Long term storage
2 Flood water harvesting
3 Roof top water harvesting
5. 1) Run off water harvesting
-surface flow of water occurring on the ground hen excess
rain fall …
a) short term storage:
-bund construction for contour catchmentzone
-typicallyuse for irrigation of grassland , fodder , shrubs
,tree etc.
6.
7. B) Long term storage:
•Buildinglarge water storage
for irrigation, fish farming.
•Reservoirs or big pond
construction,(pit,polyethene
sheet, cemented)
•It is affected by site , soil depth
and type of soil.
8. 2) Flood water harvesting:
enormous amount of over flow of water that
submerge land that is usually dry …
•a) by constructing artificial pond:
12. 3)Roof top rain water harvest:
•Commonly in practice,
•Water catch by roof is
transported by pipe network to
store in tank
•Which is further use as
irrigation drink, householduse ,
livestock after filtration.
13. Advantage of rain water harvest
1. Long term answer to water scarcity,
1. Socially adoptable and environmentally friendly,
2. Reduce pumping cost,
3. Effective on urban water system ,
4. Reduce pollution of water resource,
5. Simple effective soil erosion,. Flood,
6. Excellent source of land scape irrigation
