中文摘要：

依据经济学原理，对混凝土渠道在经济静态和动态条件下，防渗性能随运行时间呈等差衰减、等比衰减及不随运行时间衰减时的防渗效益进行了研究。给出了三种状态下防渗、维修或改建的判定原则及经济模型。结合算例，对渠道防渗效益进行了经济分析。通过渠道测验后的必要性判定，避免渠道防渗的盲目性。

英文摘要：

According to principles of economy, the seepage control effectiveness of canals which is studied under static and dynamic conditions and with arithmetic and geometric progression of seepage control performance to time as well as with no change seepage control performance to time is studied. The judge principles and economic models have been concluded and with the examples for calculations, the economy of seepage control effectiveness of canals has been discussed. It was avoided blindness of the seepage control of canals by necessity judgment of test.