关键词: 岩溶浸没, 内涝, 水库

Abstract: Karst around reservoirs is immersed, and waterlogging is one of the environment problems in water conservancy and hydroelectric constructions.Since 1980s, Karst immersion which caused economical loses have taken place in serveral reservoirs.The article takes waterlogging in the reservoir area of Yutan Hydropower Station on the Hangsui River as an example, to study the causes and forming conditions,and points out the necessity to ennhance investgations, observations and simulation tests.There are two ways to predict Karst immersion and waterlogging:relativity analysis and physical simulation test.By regreesive analysis on three parameters: river water,underground water and rainfall amount, relativity analysis can be used to research the substantial relation and regulation.Some data such as related curves among rain supplementary parmeters, Karst tube resistant parameter, water level and rate of flow, and waterlogging time can be obtained by using physical simulating test.Physical simulation can not only reflect the past status, but also predict the future situation.Forecast curve in Fig.6 displays the immersion area and immersion time under different waterlogging water levels, which provides a scientific basis for controling waterlogging.

Key words: Karst immersion, Waterlogging, Reservoirs