Abstract: In order to understand the seepage situation of Dalong dam in Sanya City, seepage observation data were analyzed through drawing figure, such as hydrograph and correlogram. The practical saturation line was below the designed saturation line, the seepage field of the dam body was steady. Seepage prevention system at dam foundation on 0+262 and 0+445 section worked effectively, but some defects were found in seepage prevention system at dam foundation on 0+335 section, which called for engineering measures. The osmometers downstream were in a hydraulic pressure-free condition for a long time, and it's disadvantageous for drawing the seepage line of dam body. Additional osmometers was suggested to make the seepage monitoring system complete and fully play its role.

摘要： 为了解海南省三亚市大隆水利枢纽大坝渗流状况，通过绘制过程线、浸润线等图形对渗流观测资料进行了分析。大坝坝体实测浸润线低于设计浸润线，坝体渗流场稳定；0+262断面和0+445断面坝基防渗系统防渗效果显著，0+335断面坝基防渗系统存在缺陷，建议采取相关工程措施治理；坝体下游测点长期处于无水压工作状态，不利于坝体浸润线的绘制，建议补充埋设相关测点，完善渗流监测体系，充分发挥监测系统作用。