灌区沟水再利用泵站工程经济评价与结构模式探讨

在排水沟上建立不同型式的沟水再利用泵站是开源补灌的主要工程措施，为探讨灌区沟水再利用适宜的泵站工程模式，该文采用面上调查和理论评价分析相结合，对沟水再利用泵站的适宜规模、基本结构模式及布局形式进行了理论探讨和经济评价。结果表明，对于沟水补充灌溉泵站工程，1 500元/hm2左右的泵站投资规模易于推广和应用，对于纯沟水灌溉泵站工程，6 000元/hm2左右投资规模可以作为推荐采用类型；根据沟水流量大小和沟道规模，可采用跨沟式或旁侧式布局形式，对于纯沟水灌溉用水方式，为进行适时适量灌溉，以保证作物正常生长，宜采用能调控水位的跨沟式泵站工程。该研究为制订当地水资源合理利用规划提供了依据，并为今后进一步发展灌区沟水灌溉提供了理论基础。

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.