Economic analysis and structure patterns of pumping engineering for reuse of drainage water in the irrigation district

The pumping stations built on ditches for reuse of drainage water are main engineering measures of increasing the sources and supplementing irrigation. In order to study the feasible pattern of pumping station engineering for reuse of drainage water, the paper discussed the suitable sizes, basic structure pattern and layout of pumping stations by investigation and economic analysis. The results show that the pumping station sizes with 1 500 yuan investment per hectare are easy to be applied and popularized when the drainage water is used for supplementary irrigation; the pumping station sizes with 6 000 yuan investment per hectare could be adopted when the irrigation completely depends on the drainage water. Based on the drainage discharge and ditch sizes, the layout of pumping stations cross the ditch and side-ditch might be adopted. While using the drainage water for irrigation, the pumping station engineering cross the ditch is preferable to be applied for guaranteeing the timely and adequate irrigation, and ensuring the crop growth. The study provided a basis for establishing the reasonable water resources utilization planning, and developing the reuse of drainage water in the irrigation district in the future.