Suggest a solution to water crisis and explain its advantages.

Explanation

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 the future.

Environmental Benefits:
(i) Promotes adequacy of underground water and water conservation.
(ii) Mitigates the effect of drought.
(iii) Reduces soil erosion as surface run-off is reduced.
(iv) Reduces flood hazards.
(v) Improves groundwater quality and water table / decreases salinity.
(vi) No land is wasted for storage purpose and no population displacement is involved.
(vii) Storing water underground is an eco-friendly measure and a part of sustainable water storage strategy for local communities.