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With rainy season underway, today we are going to talk about rain water harvesting.
What is this concept called rain water harvesting?
Rain Water Harvesting is a technique of amassing and storing rainwater, for reuse. As we are aware, water is the purest form we get. We can use this water for different purposes after the essential decontamination process according to the requirements. This framework can be a blessing in locales where there is deficiency of water. This issue is common in the big cities. Consequently, rainwater harvesting can be extremely useful in such locales.
Importance of this technique:
Drinking water supply
Seawater ingress reduction in coastal areas
Irrigation water supply
Storm water discharge reduction along with urban floods and sewage treatment plants overloading
Purpose of rainwater harvesting:
On a broad basis, rainwater can be harvested for two reasons-
Recharged in the ground for future use (groundwater recharge).
Rainwater storage for ready use in containers below or above the ground.
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What to do? Store rainwater or recharge?
The choice of whether to store or recharge rainwater, relies upon the pattern of rainfall and the possibility to do as such, in a specific region. The sub-surface topography likewise assumes an essential part in settling on this choice.
For instance, Rajasthan, Delhi and Gujarat where the aggregate yearly rainfall happens amid 3 or 4 months, are cases of regions where groundwater recharge is generally preferred. In places such as Kerala, Tamil Nadu, Mizoram and Bangalore where rain falls all round the year except for a couple of dry periods, one can rely upon a little measured tank for storing rainwater, since the period between two spells of rain is shorter. Wherever sub-strata is impermeable reviving won’t be plausible. Thus, it is perfect to settle on storage.
In areas where the groundwater is saline or not potable, the substitute option could be that of storing water.
Post generalizations, the necessity oversees the choice of water collecting system. For instance, places which has a set number of rainy days as that of Ahmadabad, Delhi, rainwater storage tanks, called as tankas, are utilized to store rainwater even today in neighborhoods, hotels and temples.
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Methods or rainwater harvesting:
Rainwater harvesting can be carried out utilizing distinctive techniques. It might take after surface harvesting strategies or rain water gathering techniques which are clarified underneath:
Storm water drains:
The vast majority of the residential areas have legitimate system of storm water channels. On the off chance that looked after perfectly, these offer a straightforward and financially savvy method for gathering rainwater.
Under this strategy, housetops are utilized for gathering the water. In the event that buildings with impenetrable rooftops are as of now set up, the catchment area is viably accessible for free and they give a supply at the point of consumption.
Bodies of water:
The capacity of tanks, lakes and ponds to store water is massive. The gathered rainwater not just exclusively be utilized to meet water necessities of the city, it additionally recharges the groundwater aquifers.
Both unpaved and paved areas such as open fields, landscapes, parks, storm water channels, streets and footpaths and other open regions can be viably used to gather the runoff. The primary benefit in utilizing ground as a gathering surface is that water can be gathered from a bigger area. This is especially beneficial in locations of low precipitation.
Rainwater harvesting is the need for today and maximum number of people should take to it.
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