水文地质参数是过江隧道设计与施工中的一项重要参数 ,文章从测试原理、测试方法、测试成果以及参数计算等方面 ,详细介绍了单井同位素示踪法在武汉长江隧道水文地质参数测定中的应用。该法能准确、快速地测定地下水的渗透流向、流速、垂向流速流向等参数 ,确定地下水的补、径、排关系。理想的测试结果表明 ,它是一种具有广阔应用前景的测试技术 Hydrogeological parameters are an important parameter in the design and construction of the tunnel. The paper introduces the single-well isotope tracing method in detail from the aspects of test principle, test method, test results and parameter calculation. The hydrogeological parameters of Wuhan Yangtze River Tunnel In the application. The method can accurately and quickly determine the infiltration of groundwater flow, velocity, vertical flow direction and other parameters to determine the groundwater fill, diameter, row relationship. The ideal test results show that it is a test technology with broad application prospects