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本文论述了拉西瓦水电站石门坝址同位素示踪探测岩体裂隙渗流中，所采用的天然示踪法与人工非示踪法以及其基本原理。天然条件下测定孔中及河水中的温度与电导，人工同位素示踪测定单井中测渗透流速、流向、渗透系数及含水层之间的补给关系，注水条件下示踪测定含水层分布、渗透系数及静水头等；以及进行天然流场与人工流场下的多孔连通试验。通过一系列的综合测试研究，查明了该坝址岩体的裂隙渗流网络及其渗透性。
This paper discusses the natural tracing method and artificial non-tracing method used in isotope tracing of rocky dam seepage in Lashiba hydropower station and its basic principle. Determination of temperature and conductance in wells and in river water under natural conditions, artificial isotope tracer determination of permeate flow rate, flow direction, permeability coefficient and recharge relationship between aquifers in single well, distribution of aquifer under water injection, determination of aquifer permeability And hydrostatic head; and natural flow and artificial flow field porous connectivity test. Through a series of comprehensive tests, the seepage network and permeability of the rock mass at the dam site were identified.