Write on Rain water Harvesting.In less than 200 words
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Answer:
Rainwater harvesting (RWH) is the collection and storage of rain, rather than allowing it to run off. Rainwater harvesting differs from storm water harvesting as the runoff is collected from roofs, rather than creeks, drains, roads or any other land surfaces. Rainwater harvesting is the simple process or technology used to conserve Rainwater by collecting, storing, conveying and purifying of Rainwater that runs off from rooftops, parks, roads, open grounds, etc. for later use.
Rainwater harvesting systems consists of the following components:
Catchment- Used to collect and store the captured Rainwater.
Conveyance system – It is used to transport the harvested water from the catchment to the recharge zone.
Flush- It is used to flush out the first spell of rain.
Filter – Used for filtering the collected Rainwater and remove pollutants.
Tanks and the recharge structures: Used to store the filtered water which is ready to use.
The benefits of rainwater harvesting system are listed below.
Less cost.
Helps in reducing the water bill.
Decreases the demand for water.
Reduces the need for imported water.
Promotes both water and energy conservation.
Improves the quality and quantity of groundwater.
Does not require a filtration system for landscape irrigation.
This technology is relatively simple, easy to install and operate.
It reduces soil erosion, stormwater runoff, flooding, and pollution of surface water with fertilizers, pesticides, metals and other sediments.
It is an excellent source of water for landscape irrigation with no chemicals and dissolved salts and free from all minerals.
Answer:
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RAINWATER HARVESTING
Rain water harvesting is the technique of collecting and storing water to preserve it for future use. The harvested water can be stored for long-term use. Rain water harvesting is vital as locally available water can meet the demand of water and minimize the overall capital expenditure. Rain water can be used for domestic, agricultural and industrial purposes.
It is a widely used concept practiced all over the world. Since decades people have relied on the method of rain water harvesting for the supply of water. Rainwater is accumulated from rooftops and directed into tanks and cisterns. There are many techniques being implemented for harvesting rain water. In present times, the catchment area is directly connected to tanks, cisterns and reservoirs for storage.
Surface water storage, dams, underground tanks, barrage, trenches and rain barrels etc. are the techniques used for rain water harvesting. It is possible that due to insufficient rain, water sources may dry. Rain water harvesting is the best practice to be ready for such times. The harvested rainwater also has to be purified before using for drinking purpose and other daily use activities. Rainwater is a gift from nature so we should value the importance of this natural resource and use it wisely.