【摘要】 为了配合全国大型灌区的节水改造 ,给不同优化灌溉模式的推广提供科学依据 ,运用 HYDRU S程序 ,对青铜峡银北灌区小麦套种玉米地的灌溉进行了多方案的一维水盐运动数值模拟。针对灌区土壤地下水位高、地下水矿化度高、潜水排泄以蒸发为主等原因 ,研究了基本灌溉模式、井渠结合灌溉模式的改变对不同程度盐碱地改良的效果 ,提出适合银北灌区不同盐碱地的灌溉制度更多还原

【Abstract】 The well known ancient Qingtongxia Irrigation District, one of the largest irrigation projects in China, is still suffered from serious salinity problem caused by the high groundwater table, high mineral concentration in ground water, and intense phreatic evaporation. By using the HYDRUS computer program, one dimensional water salt movement was simulated under diffirent well canal combined irrigation schemes with typical irrigation regime for cropping wheat in spring and corn in late summer. It is found that different irrigation conditions, for example, the surface irrigation, well canal combined irrigation, etc. have different effects on the soil reclamation. Hence, the simulated results will provide a guidence for the reclamation of the salinity soil and rehabitation of the irrigation district.更多还原