what is the use of Shallow dug Wells in khadin system? Class 10th
Answers
#We will now describe a traditional rainwater harvesting system for agriculture called KHADIN which is used in Rajasthan.
♡The main feature of khadin system of rainwater harvesting is a very long (100 m to 300 m long ) earthen embankment called 'bund' built across the lower edge of the sloping farmland (see the attached pic ).
♡The rainwater from catchment area flows down the slopes and stopped by the bund to form a reservoir.
♡The excess water flows across the bund through sluiceways (or pathways) provided for this purpose and goes into shallow wells dug behind the bund.
♡The rainwater which collects in the reservoir formed by the bund, and the well, seeps slowly into the land (or ground).
♡This water - saturated land is subsequently used for growing crops.
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Very shallow wells (less than 20 feet) can use a suction pump at the ground surface. Deeper wells must use a submersible pump to push the water to the surface. Ground water is allowed to enter the casing by either an open end pipe, perforated pipe or a well screen, depending on the size of the aquifer soil particles.
Shallow dud well drilled into the ground for extracting the ground water