9.CCT Based Question Bhujpur in Kutch region of Gujarat receives very erratic rainfall. The only source of fresh water is underground as the rivers in this region do not have water throughout the year. The demand for water has increased over the years. As a result, the water level has gone dangerously low. In 1989, the villagers along with an NGO decided to do rainwater harvesting. Eighteen check dams were built on the Ruhmavati River and its tributaries where water seeps through and recharges the soil. According to the aquifer farmers, now there is water in the wells and the water which was wasted by flowing into the sea has become available for irrigation. 1. 2 . 3. , Why does the underground water level go down with the passage of time? What are check dams? What is rain water harvesting?
Answers
Question 1 :-
Why does the underground water level go down with the passage of time?
Answer :-
The underground water level gone down with the passage of time because in that region receives very erratic rainfall. The only source of fresh water is underground as the rivers in that region do not have water throughout the year. The demand for water has increased over the years. So, the water level has gone down.
Question 2 :-
What are check dams?
Answer :-
A check dam is a small dam constructed across a drainage ditch, swale, or channel to lower the velocity of flow. Reduced runoff velocity reduces erosion and gullying in the channel and allows sediments to settle out. A check dam may be built from stone, sandbags filled with pea gravel, or logs.
Question 3 :-
What is rain water harvesting?
Answer :-
Rainwater harvesting system, also called rainwater collection system or rainwater catchment system, technology that collects and stores rainwater for human use. Rainwater harvesting systems range from simple rain barrels to more elaborate structures with pumps, tanks, and purification systems.
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