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防止渠道渗漏,是提高灌溉水利用率的重要措施之一。經驗証明,如果不采取相应的渠道防渗措施,卽使管理工作做的更好,灌溉水的利用率仍难达到先进的水平。例如,陝西省的涇、洛、渭等老灌区,虽然由于管理水平与灌水技术的不断提高,田间水的利用率已达0.9左右,但由于各級渠道的渗水漏水問題尚未得到有效的解决,因而整个灌区的灌溉水利用率仍难达到O.6。有
To prevent channel leakage is one of the important measures to improve the utilization rate of irrigation water. Experience shows that if we do not take the appropriate measures to prevent seepage and make management work better, the utilization of irrigation water is still difficult to reach the advanced level. For example, the old irrigated areas such as Jing, Luo and Wei in Shaanxi Province, although the utilization rate of field water has reached about 0.9 due to the continuous improvement of management level and irrigation technology, but the problems of seepage and water leakage at all levels have not yet been effectively solved. Therefore, the irrigation water utilization rate in the entire irrigation area is still hard to reach O.6. Have