Drought Causes and Solutions of Down-Faulted Basin Groups in Nandong Underground River Basin

Abstract

For many years, drought is severe in the basins and the mountain area of Nandong underground river basin. The author analyzes the reasons of the drought from the hydrogeological characteristics of the basin, climate characteristics, groundwater pollution ,and study indicates that the drought causes is that shallow groundwater and surface water has been seriously polluted, and it is extremely difficult to look for underground karst water. Then the author analyse solutions to solve these problems: building underground dam in Moshigou to develop Nandong underground river; rising underground water level elevation up to 1253m,it can intercept about 306 million m3 underground water. In this way, the author predict that the water shortage problem can be solved fundamentally in these three basins.