The planned reservoir is located on the main stream of the Huaihe River in Hujiazhuang Village,2 km to the northwest of the county seat,with a control area of 64.20 km2.The river length above the dam site is 22.10 km,and the average annual runoff is 25.89 million m3.The construction of the reservoir project is mainly for flood control,combined with irrigation and water supply.This paper compares and analyzes the topography,stratum lithology,geological structure,overburden thickness,weathering zone thickness,permeable zone depth,rock mass quality and so on of the upper dam site and lower dam site.The basic engineering conditions of both sites are similarly,and are suitable for dam construction.Considering the topography and relocation of residents,the upper site is better than the lower site.
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