岩溶浸没－内涝灾害研究

水库周边岩溶浸没-内涝现象是水利水电设计的环境问题之一。80年代以来,已在若干水库发生了此类现象,造成了一定的经济损失,本文以红水河岩滩水电站库区的内涝为例,分析了岩溶浸没内涝的主要原因和形成条件,归纳为降雨、管道、水库三要素。讨论了岩溶浸没-内涝灾害的预测及对策。

A RESEARCH ON KARST IMMERSION-WATERLOGGING

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.