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Rain Water Harvesting

Rain Water Harvesting WHAT IS RAIN WATER HARVESTING :
The principle of collecting and using precipitation from a catchments surface.
An old technology is gaining popularity in a new way. Rain water harvesting is enjoying a renaissance of sorts in the world, but it traces its history to biblical times. Extensive rain water harvesting apparatus existed 4000 years ago in the Palestine and Greece. In ancient Rome, residences were built with individual cisterns and paved courtyards to capture rain water to augment water from city's aqueducts.

ARTIFICAL RECHARGE TO GROUND WATER :
Artificial recharge to ground water is a process by which the ground water reservoir is augmented at a rate exceeding that obtaining under natural conditions or replenishment. Any man-made scheme or facility that adds water to an aquifer may be considered to be an artificial recharge system.

WHY RAIN WATER HARVESTING :
Rain water harvesting is essential because :-
Surface water is inadequate to meet our demand and we have to depend on ground water.
Due to rapid urbanization, infiltration of rain water into the sub-soil has decreased drastically and recharging of ground water has diminished.
As you read this page, seriously consider conserving water by harvesting and managing this natural resource by artificially recharging the system. The examples covering several dozen installations successfully operating in India constructed and maintained by CGWB, provide an excellent snapshot of current systems.

RAIN WATER HARVESTING TECHNIQUES :
There are two main techniques of rain water harvestings.
• Storage of rainwater on surface for future use.
The storage of rain water on surface is a traditional techniques and structures used were underground tanks, ponds, check dams, weirs etc.
• Recharge to ground water.
Recharge to ground water is a new concept of rain water harvesting and the structures generally used are :-
Pits :- Recharge pits are constructed for recharging the shallow aquifer. These are constructed 1 to 2 m, wide and to 3 m. deep which are back filled with boulders, gravels, coarse sand.
Trenches :- These are constructed when the permeable stram is available at shallow depth. Trench may be 0.5 to 1 m. wide, 1 to 1.5m. deep and 10 to 20 m. long depending up availability of water. These are back filled with filter. materials.
Dug wells :- Existing dug wells may be utilised as recharge structure and water should pass through filter media before putting into dug well. Recharge wells :- Recharge wells of 100 to 300 mm. diameter are generally constructed for recharging the deeper aquifers and water is passed through filter media to avoid choking of recharge wells.
Recharge Shafts :- For recharging the shallow aquifer which are located below clayey surface, recharge shafts of 0.5 to 3 m. diameter and 10 to 15 m. deep are constructed and back filled with boulders, gravels & coarse sand.
Lateral shafts with bore wells :- For recharging the upper as well as deeper aquifers lateral shafts of 1.5 to 2 m. wide & 10 to 30 m. long depending upon availability of water with one or two bore wells are constructed. The lateral shafts is back filled with boulders, gravels & coarse sand.
Spreading techniques :- When permeable strata starts from top then this technique is used. Spread the water in streams/Nalas by making check dams, nala bunds, cement plugs, gabion structures or a percolation pond may be constructed.

Due to rapid urbanization like artificial floorings, tiles, cement and concrete the rain water get washed away to the sea without penetrating the ground. Rain water harvesting ensures that water table underground gets replenished during rainy season. Ensuring continuous supply from borewell.

Our Rain Water Harvesting Solutions could bring you the following benefits:
Re-vitalizing a natural resource.
Qualified staff. (Engineers)
Ensuring highest efficiency to the project.
Quality work.
Unmatched Support.

For details please contact Mai Water Works at
 

 

Mai Water Works.


602, Spectra, Prathamesh Complex,
Veera Desai Road Extn,
Andheri (W), Mumbai – 400058.
Tel : 6761003.
Mobile : 9821526575.
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Rain Water Harvesting