Water resources is shortage in Weibei dry plateau, but rainwater is rich, the precipitation is about 550 mm in average. The mean rainwater is 13.1 times of the ground water resources.And the rainwater is easy to be harvest and piped. If the water of cellar or cistern could be used in micro irrigation, it could increase crop yield by20%~50%, the water use efficiency could be 0.8 kg/mm. So the rainwater harvesting and using is of great potential and broad prospects.
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