Abstract: | In the semi-arid area with slope of 10°, a runoff collection, storage and supplementary irrigation system for agriculture is designed to exploit the production potential of rainfall resources, the runoff-collecting surface should be dealt with concrete, and storage part should be dealt with thin concrete shell. After winter wheat was planted, and covered, the peasants irrigated wheat through supplememtary system in flowering season, thus the unit yield of wheat can be increased obviously. |