Study On Karst Leakage Of Longtang Reservoir In Sichuan Province

There are abundant water resources in Southwest China,and it is also the area of geological structure and karst development.The karst problem is more prominent in the construction of water conservancy projects in Southwest China.Karst,an adverse geological phenomenon,has a great impact on the stability of the main body of water conservancy projects and the overall closure of the reservoir.In order to develop the rich water conservancy and hydropower resources in karst areas,the first thing to be solved is many complex engineering and hydrogeological problems caused by karst development,such as the leakage problem caused by the karst development of reservoir region and adjacent valley,reservoir area and dam site,which will not only have a significant impact on the construction period and operation period of water conservancy projects,but also the success or failure of the whole project The key factors for the development of the industry.This paper takes Longtang reservoir in Southwest Sichuan Province as the research object,through collecting and analyzing the regional stratigraphic sedimentary history and structural development history of Longtang reservoir project area,especially the development history of karst in the project area,and carrying out field geological survey,mapping,exploration,sampling and indoor and outdoor tests on the area and project area,on this basis,the karst and karst water inflow in the project area are analyzed The development characteristics and laws of karst and karst water in the project area are found out.The main research contents are as follows:(1)collect relevant data to study the development characteristics of karst and karst water in the project area.(2)According to the investigation results of the project area,the development characteristics and laws of karst and karst water in the project area are analyzed.(3)In order to study the boundary conditions of karst and karst water in the project area and the relationship between recharge,runoff and discharge,hydrological tests such as connectivity test,water quality analysis and division of karst dynamic units are carried out.(4)According to the location of the project hub,the regional and karst leakage problems in the dam area may be caused by the completion of the project are analyzed macroscopically,and the engineering treatment suggestions are put forward.According to the comprehensive analysis,the development of karst and karst water in Longtang reservoir has three characteristics: the first is that the development of karst and karst water in the project area is mainly controlled by the structure;the second is that the karst and karst water in the project area have boundary conditions and distribution rules;the third is that the karst leakage treatment of Longtang reservoir is reliable.Due to the obvious characteristics of karst leakage in Longtang reservoir,it is representative.Therefore,it is of great practical significance to study the karst and karst water in the area and engineering area and analyze the karst leakage of the reservoir.