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Water storage tanks (reservoirs) containing foreign material such as debris, solid waste, leaves, or any other material will damage the pumping units which lift water from those reservoirs and supply to irrigation systems specially in drip irrigation system. The small particles not only create blockage in drip lines and emitters but the large sized material including leaf, straw, wooden pieces, animal waste will choke the screen filter, damage the foot valve, pump impellers and finally burns the motor which operates the pump.
Try to avoid such practices to improve the efficiency of the pumps and ultimately the whole irrigation system.