自流灌区是黄河流域的大型灌区,灌区的节水,对于缓解整个黄河流域的水资源紧缺的局势具有重要意义。在灌区内部水资源的优化配置中,减少输水过程的损失,将是节水的重点。尤其是渠道的防渗衬砌,防冻胀及运行管理等成为建设中的难点、焦点问题。 The gravity irrigation area is a large-scale irrigation area in the Yellow River basin. The water-saving in the irrigation area is of great significance for alleviating the water shortage in the whole Yellow River basin. In the optimal allocation of water resources within the irrigation area, reducing the loss of the water transfer process will be the key point of water conservation. In particular, the channel of impermeable lining, frost heaving and operation management has become a construction of the difficulties, the focus of the problem.