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北京郊区房山县琉璃河乡李庄大队。地处平原。近年来,连续干旱,地下水位连续下降。利用机井水源,灌溉小麦、玉米,由于土地起伏不平,采取常规地面畦灌方法,浪费水,灌溉质量差。用水定额偏高,灌溉效率偏低。为了节约用水,扩大单井灌溉效益,1980年利用原有的二眼机井。由畦灌改成半固定管道式喷灌,实施后,取得较好的效果。灌溉面积由原来260亩扩大到757亩。改成喷灌后,节约了用水,小麦喷灌灌水定额21米~3/亩,比畦灌80米/~3亩省水73.8％;喷灌灌溉定额168米~3/
Fangshan County, Beijing suburbs Liuli Liuli Township brigade. Located in the plains. In recent years, continuous drought, groundwater levels continued to decline. The use of well water, irrigation of wheat, corn, due to undulating land, using conventional surface irrigation method, wasting water, poor irrigation quality. High water quotas, low irrigation efficiency. In order to save water and expand single-well irrigation benefit, the original two-hole machine was used in 1980. By the irrigation into semi-fixed pipe sprinkler irrigation, after the implementation of better results. Irrigation area expanded from 260 acres to 757 acres. After changing into sprinkler irrigation, saving water, wheat irrigation irrigation quota of 21 m ~ 3 / mu, 80% more than 畦 irrigation / ~ 3 acres of water 73.8%; Irrigation irrigation quota of 168 m ~ 3 /