为了解决黄龙景区雪山梁隧道开挖过程中的涌水水源识别问题，结合黄龙景区雪山梁隧道的相关施工资料，依据已有的地质资料和涌突水预测，通过水分析化学实验，采用灰色理论计算方法研究不同水系之间的关联度； 而后针对单一水源和混合水源分别进行试验和分析，得出雪山梁隧道出口段内渗漏水来源最可能为大气降水，关联度较高的还有淘金沟上游水系和隧道出口处水系； 最后进行比对，得出隧道渗漏水主要来源是大气降水和淘金沟上游水体的结论，并依据现场资料及实地踏勘，验证了灰色理论分析结果的可靠性。

The grey relational degrees among different water systems of Xueshanliang Tunnel are studied by water chemical analysis experiment based on existing geological data and water gushing prediction, so as to identify the water source of water leakage. The single water source and multiple water sources are tested and analyzed. The results show that the atmospheric precipitation may be the main water source of water leakage of exit section of Snow Mountain Tunnel, and the upstream water system of Taojin Ditch and water system of tunnel exit have a high relational degree as well. Site investigation is carried out, and the results show that the atmospheric precipitation and upstream water system of Taojin Ditch are the main water sources of water leakage of Snow Mountain Tunnel. The analytical results of grey theory are proved to be feasible.