通过分析新安江右坝区环境水中的同位素²H，¹⁸O，³H以及温度与电导分布，研究新安江右坝存在的绕坝渗流场。环境同位素数据证实了右坝肩基岩中存在着绕坝渗漏，排水廊道中的排水既有边坡降雨入渗，又有库水的绕坝肩补给，排水廊道扇形孔中的渗水完全来自于绕坝肩的库水渗漏。3E_1-1扬压力升高的原因是由于F0断层渗漏造成的结果，但6坝段和7坝段下部的F1断层基本上不存在渗漏,灌浆廊道G7-4排水孔中渗水中的³H高达19.54TU，证实该渗漏水来自坝后区的降雨补给。右坝肩观测孔R3和R6等孔中发现绕坝库水成分，环境同位素数据同时证实了人工示踪方法得到的结论。

Environmental isotope ²H, ¹⁸O and ³H, temperature and electric conductivity had been used to analyze bypass abutment seepage flow of Xin'anjiang right dam. Environmental isotope data on the right dam indicate the existence of bypass seepage flow in rock. The seepage water from the drainage gallery boreholes is not only from mountain precipitation but also from reservoir water that leak bypassing the right abutment. The reason of uplift cell 3E_1-1 increasing is the result of the leakage from the fault F0. There is no seepage from reservoir to the grouted gallery through fault F1 under No. 6 and No. 7 dam section. Given the tritium is about 19.54 TU, the leakage water of G7-4 borehole comes from local precipitation of right dam. Part of reservoir water is proved to exist in the observation wells of right dam abutment. The data of environment also testified the result from the artificial tracer method.