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以内蒙古兴安盟扎赉特旗0.13万hm2土地以地表水为水源的喷灌机灌溉工程为例,分别从水源工程设计、管网系统布置、输水管径确定、工作制度制定、水力计算和水泵的选型几方面,对控制面积33.3 hm2的单个中心支轴式喷灌机工程设计进行了论述。3年的实践证明,农田灌溉水利用系数由原来的0.65提高到0.85;平均用水量由原来的5 700 m3/hm2下降到4 350 m3/hm2,年平均节约水180万m3。
Taking irrigation project of irrigating machine with surface water as the source of water for 13 500 hm2 land in Xing’an League, Xingan League, Inner Mongolia as an example, from the aspects of water source project design, pipe network system layout, pipe diameter determination, working system, hydraulic calculation and water pump Of the selection of several aspects of the control area of 33.3 hm2 single central pivot irrigation engineering design are discussed. Three years of practice have proved that the coefficient of utilization of farmland irrigation water has been raised from 0.65 to 0.85 and the average water consumption has dropped from 5 700 m3 / hm2 to 4 350 m3 / hm2, saving an average of 1.8 million m3 of water annually.