清泉洞穿过坝体,是大坝工程的隐患,搞清楚清泉洞流量的主要补给来源,是水库漏水还是左岸地下水的渗水可为加固工程提供重要依据。所以,从清泉洞、水库和左坝肩附近地区各取水样,用同位素δD和占δ~(18)O进行对比分析。从分析结果看出,清泉洞水的流量主要是由水库水补给的,但也有一小部分从左岸渗入的地下水。 Qingquan hole through the dam body is a hidden danger of the dam project, to find out the main source of recharge springs, the reservoir leaking or left bank groundwater seepage can provide an important basis for strengthening the project. Therefore, water samples were collected from each area around Qingquan Cave, reservoir and the left abutment, and the isotopic δD and δ ~ (18) O were used for comparative analysis. According to the analysis results, the flow of springs at Dongquan is mainly supplied by reservoir water, but there is also a small part of groundwater infiltrated from the left bank.