Leakage Analysis Of The Neighborhood Valley On Right Bank Of Guan Kou In Chengdu

Reservoir leakage is a common problem of reservoir construction and engineering geology. Reservoir leakage is affected by a number of factors, such as topography, lithology, geological structure, karst development and hydrogeological conditions. In the most factors of influencing reservoir leakage, two of the most crucial factors is the leakage passageway in the project area decided by the geological structure and lithology and hydrodynamic conditions decided by hydrogeology. Normally, the reservoir is leaking channels of communication exist within and outside the strong reservoir permeability media, is the most common medium of karst aquifers and fractured fault zone, ancient river, and human activities (such as coal mining shaft, Tunnel project, exploration bores, etc.) of the channel is very rare. Reservoir water leakage is dynamic conditions with the adjacent Valley Reservoir, as well as during the watershed between the underground water power, When the reservoir water elevation beyond the underground watershed elevation, Reservoir leakage of the hydrodynamic conditions of the full terms and conditions are set up.The Guan kou reservoir locates in the northern edge of the Chengdu Plain at the low mountains, will be completed as a backup water source of Chengdu .Reservoir built On the Jian Jiang River upper reaches of Tuojiang water system, open valley area, the terrain slopes gentler slope. Because most of the left bank of the reservoir area are tall mountains, the possibility of leakage is small, This paper discusses the right bank of the reservoir leakage. First, we analyzed the basic leakage conditions,Under natural conditions in bedding development of the unconfined aquifer constitutes a natural channel leakage, coal mining and underground roadway after the formation of artificial channel leakage. After the dam water level and the level of coal mining between the head of a huge difference. This reservoir leakage of the hydrodynamic conditions, the reservoir channel leakage power and water conditions have been established; Reservoir then expounded the basic pattern of leakage and related treatment, on the right bank of thin Yakou and coal reservoir leakage of the influence of the detailed analysis; Finally, used the current prevailing international software Visual Modflow to build a realistic three-dimensional model of groundwater flow type, Implementation of the right bank of the reservoir area before and after the reservoir was filled, where coal mining and coal mine after water storage reservoirs is not exploitation of groundwater flow changes in the simulation of the study area at different times, under different circumstances groundwater flow graph. On this basis, through different times and circumstances of groundwater flow simulation, of coal mining in the region before and after the reservoir was filled, the water table changes, Mine study area for the future of water after the drainage channel and the development of measures to control water and provides a scientific basis, also for the construction of the gateway to the right bank of the reservoir Valley leakage effects laid the foundation for evaluation.