Rain water harvesting – RWH (Solution to water
crisis – A ecological problem)
Rainwater harvesting is the accumulation and storage of rain water
for reuse in-site rather than allowing it to run off. Rainwater can be
collected from rivers, roof tops and the water collected is directed to a deep
pit. The water percolates and gets stored in the pit. RWH is a sustainable
water management practice implemented not only in urban area but also in
agricultural fields, which is an important economical cost effective method for
Promotes adequacy of underground water and water conservation.
Mitigates the effect of drought.
Reduces soil erosion as surface run-off is reduced.
Reduces flood hazards.
Improves groundwater quality and water table / decreases salinity.
No land is wasted for storage purpose and no population
displacement is involved.
Storing water underground is an eco-friendly measure and a part of
sustainable water storage strategy for local communities.
Water bodies like lakes, ponds not only provide us a number of
environmental benefits but they strengthen our economy as well as our quality
of life like health. Lakes as a storage of rain water provides drinking water,
improves ground water level and preserve the fresh water bio-diversity and
habitat of the area where in occurs.
In terms of services lakes offer sustainable solutions to key
issues of water management and climatic influences and benefits like nutrient
retention, influencing local rainfall, removal of pollutants, phosphorous and
nitrogen and carbon sequestration.
Lakes are man-made surface water harvesting systems. They are
useful for irrigation, drinking, fishing and recreation purposes. It is the
responsibility of the individuals as well as communities collectively to
maintain and manage water bodies. Understanding catchment areas help us to halt
the degradation of water bodies and protecting it from getting polluted.
Sholavaram Lake : It is located in Ponneri Taluk of
Thiruvallur District. It is one of the rain fed reservoir from where water is
drawn for supply to Chennai city. The full capacity of the lake is 65.5 ft.
Built in the British era this lake is responsible for treating the guests to
water sports too. This lake is rich in varied species of flora and fauna.
Chembarampakkam Lake: It is located about 25 km. from
Chennai. This lake is 500 yrs old. This lake is a rain fed water body which
aids the Chennai City in its water supply.A river named Adyar also incepts from
this lake which acts as the primary outflow for this reservoir. This lake is
spread over an area of 15 square km.
Maduranthakam Lake: It is located in Kancheepuram district
and it is a man-made creation. An ideal spot for an evening picnic, the
widespread pristine waters of the lake are an exceptionally calming sight. The
full capacity of the reservoir is 23.3ft. Kiliyar is a small river that
originates from Madhuranthagam reservoir. It spreads to an area of 2908 acres
and was built by Uttama Chola and the boundaries (stretched upto 12960 feet)
are strengthened by Britishers with a storing capacity of 690 million cu.feet.
Rain water from Cheyyar, Thiruvannamalai and Vandavasi reaches this lake.