On the base of the study on the hydrogeochemistry at dam area , the author analyzes the last hydrochemistry data of bearing crevice water . from the diagram of piper and the correlation diagram of na / ca and na , it is known that the deep bearing tectonic fracture water is produced by two sources mix , meanwhile it is found out that there is better hydraulic power connection among bore d46 , d503 , d211 , which shows there is better nnw hydraulic power connection at complex zone making up of fault no . 7 , no . 15 and no . 2 在坝区的水文地球化学的研究基础上，整理分析了坝区以前的承压裂隙水的水化学资料，从piper图、 na ca ? na关系图，说明了坝区深部承压裂隙水是二源混合的产物，结合聚类分析表明了坝区d46 、 d503 、 d211钻孔之间存在较好水力联系，进而说明了在坝区f7与f15断裂带以及f2构成的复杂地带存在北北西向较好的水力联系。
