The Study Of Groundwater Flow System Characteristic Based On The Soil Trap Modeling

In the development process of groundwater flow system,it's controlled by terrain,infiltration strength and permeability,director of medium ratio and potential sink.Scholars at home and abroad make a great many of study in the hydrodynamic characteristics and affecting factors.In the course of regional groundwater flow,the concentration of regional water changes gradually.It affects the permeability of medium.Reservoir filling upraises the surface water level in river valley region,the potential meeting conditions of the system changes relevantly.And it effects both regional water in deep part and local water in shallow part.But very few scholars do research on concentrations of regional water and surface water lever changing in engineering work in the field of groundwater presently.In this paper,on the basis of summary groundwater flow theory,the type of folding systematic is selected as prototype test of generalizability by analyzing groundwater system factors and geological prototype.By generalized topography and potential meeting,two of the most important control factor,based on sand trap model experience,made physical simulation on concentration and surface water level variation process.Analyzing the changing characteristic of groundwater flow system by image processing.Here are the following conclusions.(1)As regional water concentration increases,the streamline in regional area moves down significantly,the streamline in local area moves down slightly.There is a concentration gradient between local system and regional system.The average flow speed decreased in regional water system,with the reduction of regional circulation.The excretion of local system increases gradually from the initial ratio of 46.80% to 63.80%,the excretion of regional system fell from 53.20% per cent to 37.20% correspondingly.(2)In the groundwater flow system of experiment?-2,there are 3 stagnation points.Respectively,it is at(0,0)and(100,0)location in the regional system and(60.1,35.1)of point SP in the local system.(3)Effect of liquid viscosity to increase flow speed is greater than the density of water in a freshwater flow rate increases.Unit weight of liquid on the surface into the lowest position,the head loss ? will increase.(4)As the rise of regional discharge surface water level in the valley,the streamline belonging to the shallow local and regional system offset upward,the streamline belonging to the deep local system does not change significantly.In draining zones,the streamline in regional system changes similar to the local system.The No.1 streamline in the regional system average flow velocity of the water particle reduces 29.26%,the No.5 streamline in L2 local system average flow rate increased 18.5%,the No.5 streamline in L2 local system average flow rate decreased 13.4%.Regional excretion decreased while the local discharge points increased.(5)The surface water level rise in discharge area has an obvious impact on the groundwater level near the discharge point,which directly affects the hydraulic gradient decrease,resulting in changes in the flow of the water system.