There are a number of types of systems to harvest rainwater ranging from very simple to the complex industrial systems. The percolation tanks are mostly earthen dams with masonry structure only for spillway. Since rainwater is collected using existing structures, i. Recharge water should be silt free and for removing the silt contents, the runoff water should pass either through a desilting chamber or filter chamber. Water is our most precious natural resource and something that most of us take for granted. The high nitrate content in groundwater is mainly from irrigation runoff from agricultural fields. It increases the productivity of aquifer.
Usually people in the rainfall-prone areas like Tamil Nadu, and parts of northeastern and even north-western India where there is a scarcity of potable water. Rain Water Harvesting in Manipur There are good opportunities for rain water harvesting in Manipur because Manipur is blessed with monsoon type of climate. Harvesting rainwater checks surface run off of water and reduces. Rainwater harvesting is a strategy of collection and storage space of rainwater into natural reservoirs or tanks, or the seepage of surface water into subsoil water channels. Rain water harvesting systems are simple to install and operate. Rainwater harvesting is the accumulation and deposition of rainwater for reuse on-site, rather than allowing it to run off. .
Its entire portfolio is based on sound content of a scientific and semi-scientific nature. More the amount of rainfall more is the harvested water from roof top. The purpose of the percolation tanks is to recharge the ground water storage and hence seepage below the seat of the bed is permissible. This helps in two things, solving the water crisis and preserving environment. The roofs our homes are the best catchment areas, provided they are large enough to harvest daily water needs. In India, it is an ancient practice to collect the rainwater from the rooftops, foot-hills into the tanks. There is a great demand of water in industries and the industrial sector offers great opportunities to conserve water.
By assessing the performance of various sized storage capacities, it is possible to make an informed decision as to what would be the most suitably sized storage capacity for the given application. It is the term used to indicate the collection and storage of rain water used for human, animals and plant needs. The technique is suitable for buildings having a roof area of 100 sq m and is constructed for recharging the shallow aquifers. People are not only dying of thirst but also of diseases caused by water due to the water crisis. So the seriousness of the issue has been realized the seriousness and efforts to overcome this problem has been initiated. Collecting your own rainwater is an excellent way to conserve this precious resource.
The aquifer serves as a distribution system also. Some systems can also to use for drinking. It will also stop the soil erosion. To harness the maximum run off in the stream, series of such check dams can be constructed to have recharge on regional scale. Surface water can be stored by redirecting the flow of small creeks and streams into reservoirs on the surface or underground. However, the dirty roofs add to the hesitation of collecting water from rooftop.
The experimentation under the National Watershed Development Programme for Rainfed Agriculture is being carried on since 1986-87. These are back filled with boulders, gravels and coarse sand. The best way to conserve water is its judicious use. Here rain water flows away as surface run off and can be stored for future use. Rainwater harvesting is a very ancient technique. Check dams are constructed across small streams having gentle slope. It is socially acceptable and environmentally responsible.
Rain water is better for landscape plants and gardens because it is not chlorinated. This is a kind of check dam commonly constructed across small streams to conserve stream flows with practically no submergence beyond stream course. As a result, they turn to filthy sources of water like lakes, ponds and stagnant sources. No evaporation loss from the reservoir and no siltation in the reservoir take place. In arid areas, wherever water has been brought for irrigation, saline and alkaline tracts have emerged, rendering the soil infertile.
This is a global problem and needs a speedy solution. Ground water is one of the inevitable sources of water in the maximum of the modern urban areas. By doing this, any dirt on the roofs of buildings that has built up prior to the rain can be excluded from the tank. Although the earth is three-fourths water; very little of it is suitable for human consumption or agriculture. Since the water is stored within the aquifer, submergence of land can be avoided and land above the reservoir can be utilized even after the construction of the dam.