Rainwater harvesting – this term refers to save water and is an important feature in almost every residential projects in India nowadays. This process plays a pivotal role to restrict water wastage and also allows us to restore the rainwater. So, here in this blog post, we are letting you know about what is rainwater harvesting and how you can save water from the same.
1. What is Rainwater Harvesting?
The process to collect water from river, roof, rain, fog and dew and storage of the same in a borewell or a pit is known as water harvesting. This helps you to make use of recycled water for various purposes like irrigation and watering in garden. Water harvesting is a traditional method to save water that can be used later.
2. Water Harvesting and Problems
Flood is a common problem faced during the monsoon but the adoption of the rainwater harvesting technique can minimize the risk of waterlogging and flooding. Actually, the maximum amount of rainwater gets wasted because the cemented floor can’t absorb the water and it goes into the sea via rivers. But during the monsoon season all the water bodies get over flooded with water storage and this let the water flow down in the city resulting in the rise of water level.
The second problem is drought or insufficient water supply. In both these scenarios, the stored water can come to rescue as the proper treatment of the collected rainwater can be used for various purposes including water heating at home, watering to the plants and irrigation into the fields.
3. Methods for Rainwater Harvesting
Roof Rainwater Harvesting – This process is popular in urban areas as the townships and independent home owners can also store water on terrace. Make use of conduits or pipes to set up the rainwater harvesting system. This method is beneficial in a larger context as an area of 40 ft x 60 ft can yield nearly 1,84,000 liters of water. This is the amount of water than can be saved if the locality records 100 cm of rain in a year.
Ground Water Recharge – Frequent reduction in the water table is a major cause of worry. Thus, digging a pit or a well to store rainwater is a perfect way to increase the level of water table.
4. Professional Guidance
You must take professional guidance to install the rainwater harvesting setup as they offer exact details whiles considering the space, area and location.
5. India and Rainwater Harvesting
The present Government of India is emphasizing on rainwater harvesting but some states have already begun the approach to store water today that can be used tomorrow when any drought-like situation arises.
Tamil Nadu is the first Indian state to introduce rainwater harvesting under its jurisdiction. In 2001, the State Government made rainwater harvesting compulsory to control the lowering level of the water table. The Govt created awareness about the same and all the rural and urban areas worked on the issue and this offered excellent results in the next five years.
The Chennai city alone has recorded an increase of 50% in the water level and this is similar across the state. After this, other states have followed this model to save water.
Karnataka also made it compulsory for the property owners to have rainwater harvesting system if he/she occupies an area of more than 60ft x 40 ft. The area is fixed at 30ft x 40ft for the newly constructed buildings. To encourage this water-saving technique, the Bangalore Water Supply and Sewerage Board built a Rainwater Harvesting park in the name of Sir M. Visvesvaraya a civil engineer and a statesman. This park is spread across 1.2 acres at Jayanagar, Bengaluru.
Rajasthan has an age-old process of rainwater harvesting, particularly in Thar dessert. This technique is also adopted in Jaipur, the capital city of the state.
Maharashtra state made rainwater harvesting compulsory for the new housing societies and the Mumbai Municipal Corporation plans to make the same mandatory for large residential societies.