灌区井灌效率研究

灌区灌溉采用井灌井排，开发利用地下水资源，不但能有效降低地下水位，防止土壤次生盐碱化，还可以通过井渠互补，使农作物得到适时灌溉。针对目前井灌工程效率低下的问题，通过抽水试验，经过理论分析，推导出了井灌低压管道输水灌溉系统的最优出水量、最佳扬程和经济管径计算方法，从而可提高机井灌溉效率。

Study on Well Irrigation Efficiency of Irrigated Area

To adopt well irrigation and well drainage,develop and utilize ground water resources of irrigated area can not only effectively reduce the ground water level and prevent secondary alkalization of the soil,but also provide timely irrigation to crops through well and canal complementary.Aiming at the present low efficiency of well irrigation works and through pumping tests and theoretical analysis,the paper derives a method for calculating the optimum water yield,the best lifting distance and economic pipe diameter of low pressure pipe delivery system of irrigated area by wells,increasing the efficiency of motor-pumped wells.