ABSTRACT
The composite geomembrane defects can cause safety hazards to the dam's seepage control. The seepage law of the dike under the action of different seepage heads and composite geomembrane defects was studied, and the leakage temperature field, seepage line, and leakage rate of the dike were analyzed. The results show that different seepage heads have a significant impact on the temperature field of the dam body around the composite geomembrane defect. The temperature change around the defect is significantly faster and closer to the seepage water temperature as the seepage head increases; the average rise and fall rate of the seepage line of the dam increases rapidly with time. The higher the seepage head is, the earlier the leakage of the dam will occur. When the leakage is stable, the leakage rate of a single-width dam with a high head is always greater than that of a dam with a low head.
