Rainwater harvesting is one of the simplest and oldest methods of water conservation. Rainwater harvesting (RWH) is the gathering and storage of rain, in preference to permitting it to run off. Rainwater is gathered from roofs and redirected to a tank, cistern, deep pit (well, shaft, or borehole), aquifer, or a reservoir with percolation, in order that it seeps down and restores the floor water. Dew and fog also can be gathered with nets or different tools. Rainwater harvesting differs from storm water harvesting because the runoff is gathered from roofs, in preference to creeks, drains, roads, or every other land surfaces. This water is used in watering gardens, livestock, irrigation, home use with right treatment, and home heating. The harvested water also can be devoted to longer-time period garage or groundwater recharge.
Reasons to use RWH in India
Rainfalls in India each year purpose the 2 very extremities disaster – flood and drought. In a few locations, it rains a lot which results into water logging and flood and as soon as the monsoon is long gone no rain comes in any respect for the relaxation of the year, inflicting large and deadly droughts. Agriculture in such regions is absolutely restrained and decreased to the span of wet seasons.
In such regions wherein the rainwater isn't always adequate, rainwater harvesting gives a pleasant solution. Precisely, that is the motive because rainwater harvesting is turning into a popular alternative to water source in the drought inclined corners of India. In brief, rainwater harvesting is a way to accumulate rainwater from rooftops and different locations to the most volume possible, which will use it in the dry seasons.
Potentials of Rainwater Harvesting in India
Rainwater harvesting in India has a superb potential. States like Maharashtra, for example, are regularly afflicted by droughts during the dry seasons. Nevertheless, researchers display that the minimal annual rainfall in Maharashtra is greater or much less 400mm. This shows that each rectangular kilometre of Maharashtra gets 4 lakh cubic metres or four hundred million litres of rainwater each year.
Considering the populace density and the styles of usages of water, professionals assert that for a populace density as excessive as ten thousand folks according to rectangular kilometre, the call of water could be approximately 180-185 million litres. This is much less than even the 1/2 of the yearly rainfall. Even in other parts of India, water table is depleting at a very alarming high rate, the rainwater recharge structures will help augment groundwater reservoir as its hindered by loss of unpaved ground in urban settings.
From this calculation, we will genuinely assert that availability of water in India isn't always a trouble. The trouble is the lack of service providers to collect and keep water. Hence, if nicely carried out and utilised, rainwater harvesting in India can provide a consistent in addition to smooth answer from the drought problems.
Rainwater harvesting in India isn't always a theoretical trouble. The handiest aspect we want for a hit implementation of rainwater harvesting in India is an enthusiastic company, each in governmental and non-governmental levels, to inspire and preserve powerful rainwater harvesting in India.