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1节水灌溉首先要充分利用当地水资源首先,充分利用降水是节水灌溉的首要措施。利用降水是农作物生长用水的基础,灌溉是补充降水的不足。利用天气预报、墒情预报和蓄积降水的技术措施,充分利用降水,以节约灌溉用水。其次,合理利用浅层地下水。据《中国水资源评价》一书资料,我国北方6流域片平原区地下水平均年可开采量合计为1022．72亿m~3,约相当2条黄河的年径流量。开发利用浅层地下水对解决北方地区干旱缺水问题有重要作用。开发浅层地下
First of all, water-saving irrigation First, make full use of local water resources First, make full use of precipitation is the first measure of water-saving irrigation. The use of precipitation is the basis of water for crop growth, and irrigation is a supplement to precipitation. Make use of the weather forecast, the forecast of moisture content and the technical measures of accumulating precipitation to make full use of precipitation to save water for irrigation. Second, rational use of shallow groundwater. According to the data of China Water Resources Assessment, the annual average recoverable groundwater quantity in the plain of 6 watersheds in the northern part of China is 102.272 billion m 3, equivalent to about 2 annual runoffs of the Yellow River. Exploitation and utilization of shallow groundwater plays an important role in solving the problems of arid and water shortage in the northern region. Develop shallow underground