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1 引言 郓城县地处黄河冲积平原,随着黄河来水的日趋减少,增加了引黄的困难,水资源供需矛盾日益突出,而农田灌溉是用水大户,约占国民经济总用水量的83.5％以上。因此,发展节水灌溉是关键。2 各种节水灌溉方式分析2.1 渠道防渗 郓城县现有苏阁、杨集两个引黄灌区,干、支渠总长度200多km,渗漏特别严重,灌溉水利用系数只有0.3～0.4。1999年对杨集
1 INTRODUCTION Tancheng County is located in the alluvial plain of the Yellow River. With the decreasing of incoming water from the Yellow River, it has increased the difficulty of dredging the Yellow River. The contradiction between supply and demand of water resources has become increasingly prominent. However, farmland irrigation is a major water user, accounting for 83.5% of the total national water consumption %the above. Therefore, the development of water-saving irrigation is the key. 2 Analysis of various water-saving irrigation 2.1 channel seepage Tancheng existing Court Court, Yang set the two Yellow River Irrigation District, dry, branch the total length of more than 200 km, the leakage is particularly serious, irrigation water utilization coefficient of only 0.3 to 0.4 1999 to Yang set