Study of fissured-rock seepage flow with isotope tracer method in single borehole

摘要

a systematic summary is presented describing the application of isotope tracer method in detecting seepage flow in a single borehole. In a single borehole, many hydraulic coefficients, such as flow velocity, direction of flow, vertical flow etc., can be obtained by using isotope tracer method. There are three conditions if a fissure intersects a borehole: vertical, parallel an tilt. Ac- cording to each different condition, the formulation of flow velocity deduced by isotope dilution method is different.