– Kishor Pate, CMD – Amit Enterprises Housing Ltd.
Rainwater is the cleanest source of freely available potable water. Practiced in urban residential projects, rainwater harvesting will be able to meet almost 50% of the city’s water needs. Households as well as commercial buildings can save a lot on their water bills. Harvesting rainwater is not just about maximum utilization of a freely available resource but also about minimizing the impact of urban development on our natural surroundings. In fact, failure to harvest rainwater results not only in the obvious loss of a precious resource but also in heavy soil erosion.
5 Importance of Rainwater Harvesting that can save the world
Reduced Demand for Ground Water
The water supply in urban homes comes from reservoirs that are fed by lakes and rivers. Treatment plants and pumping station also pump out the ground water, gradually reducing the available amount. In several Indian cities, the ground water table has already exhausted itself and rainwater is the only available solution
Backup Water Supply
Rainwater harvesting can be insurance for times when the regular water supply has been compromised. With climate change taking a major toll on the availability of naturally available water, rainwater can be of use during times of drought. Pune and Mumbai, in particular, must resort to rainwater harvesting on a war footing to minimize their dependency on reservoirs.
When a neighborhood starts using rainwater, the community as a whole will be able to fight the problems associated with runoffs, soil erosion and pressure on the drainage systems. Collecting rainwater would also mean reducing the chances of contamination that flows into our rivers and lakes. Low-lying areas like can also fight the chances of flooding by harvesting large volumes of rainwater. Rainwater harvesting, therefore, meets the needs of the environment and ensures that the city is less affected by chemicals that run off from our farms into our rivers.
Ease of Implementation
A rainwater harvesting setup is easy to install and maintenance is not a big challenge. The purest form of water, rainwater also does not need very complicated purifying devices to meet our primary needs. Based on basic technologies of collection, filtering and storage, rainwater harvesting setups are worth the minimal initial expense and effort required to set them up in every way.
While the tools for rainwater harvesting can be used by anyone, there are some important facts to remember:
- Identification of catchment areas that include terraces, car parking, roads and other concrete surfaces
- Installation of gutters with filtration system that blocks debris on the outside
- Channels that ensure a smooth flow to the storage system
- Safety precautions against any kind of contamination, including the breeding of mosquitoes
Increasing Support from the Government
The incumbent Indian government has been rightly focusing on the water scarcity problem, and as a result has been facilitating several plans for rainwater harvesting. New apartment projects are now by law required to have rainwater harvesting systems in place and in several regions. With rainfall getting scantier every year, the government is looking to initiate special installations in residential societies, commercial buildings, educational institutions and other buildings. The increasing road coverage in the country also opens up an excellent avenue of rainwater collection for better use.
India’s Center for Science and Environment (CSE) is also creating programs to raise awareness for maximizing the use of rainwater harvesting across the country. It has been supporting several NGOs, consultancies and companies to educate people on what has been a traditional means of collecting and using rainwater for future purposes.
Today, rainwater harvesting should come automatically as a building standard. While builders are already getting aware, customers too should start asking for the same. In several areas, old building which were not integrated with harvesting systems should be reconstructed or retrofitted to support rainwater harvesting. This is by all means a vital measure that cannot wait longer.