Research On 3D Simulation And Optimization Of Groundwater System Based On Visual Mod Flow

The changes in the water level and hydraulic gradient of the groundwater flow field in the aquifer can effectively reflect the rational exploitation of groundwater.During the operation of the actual pumping well group system,the water level and hydraulic gradient changes in the groundwater flow field are the guarantee for the sustainable development of groundwater resources.At present,domestic and foreign experimental research on this aspect has begun,especially the use of numerical simulation software for calculation and analysis.However,domestic and foreign research is mainly focused on single pumping well groups,and there are few studies on the changes of groundwater flow field water level and hydraulic gradient of pumping well groups in the absence of natural cross-flow form and in the presence of natural cross-flow form,especially the actuality of the pumping well group system.Engineering applications involve less.For the pumping well group system,the water circulation in the aquifer groundwater field in the pumping well group area is more active,and the changes in the water level and hydraulic gradient of the groundwater flow field are more complicated.And the variability of groundwater flow field,pumping irrigation experiments are costly,time-consuming,and difficult,and there are often many factors that cannot be controlled and predicted during the system experiment.Therefore,the experimental work on the pumping well group system is also urgently needed to solve the many uncertainties in the software simulation calculation process and enhance the reliability of the numerical simulation results,especially on the basis of multi-condition research of groundwater flow fields.Optimization of pumping and irrigation well group model.In view of the above problems,this paper has carried out a study on the water level and hydraulic gradient of the groundwater flow field in the area of pumping well groups.The main contents of the research include: on the one hand,to establish an indoor sand tank experimental system based on similar theories,design pumpingexperiments,recharge pumping synchronization experiments,and natural cross-flow experiments,to achieve multi-operating conditions research with a small amount of operation,and to calculate the groundwater flow field through Visual Mod Flow simulation The water level and hydraulic gradient change process,analyze the water level and hydraulic gradient change law of the groundwater flow field;on the other hand,the multi-cycle operation simulation of different operating modes and different operating conditions of the groundwater pumping well group system at the actual application structure scale Computational analysis,and on this basis,an optimized layout scheme and operating mode of pumping and irrigation well groups are proposed,which lays the foundation for the optimal operation and management of groundwater systems and the sustainable use of water resources,and provides theoretical references and relevant practical engineering applications.in accordance with.The indoor sand tank experiment results show that in the pumping experiment,the smaller the pumping volume,the smaller the change in the water level and hydraulic gradient of the groundwater flow field,which is a relatively optimal pumping mode.In the experiments performed simultaneously,the total The smaller the amount,the slower the decline of groundwater flow field water level and hydraulic gradient,which is a relatively better pumping and irrigation mode.In the natural cross-flow experiment,the existence of vertical cross-flow and horizontal counter-current can serve as a supply "falling funnel" and The effect of leveling the "inverted funnel",the level of downstream flow on the water level in the area of the pumping well group is weak.The simulation results show that in the analysis of the impact of the layout of the pumping well group,the uniform distribution of the pumping wells is the optimal layout method among the three working conditions;the impact of the number of pumping well groups and the recharge amount cannot be simply analyzed.The number of pumping irrigation well groups and the size of pumping irrigation capacity are used to judge the changes in groundwater flow field water level and hydraulic gradient.Moreover,comparing the number of pumping irrigation well groups andpumping irrigation capacity in the optimization scheme is not static.The distribution position of the pumping group changes.In this study,in conjunction with the National Natural Science Foundation of China,the research focuses on the variation of groundwater flow field levels and hydraulic gradients in the area of pumping and irrigation well systems.The method of combining experimental research and simulation calculation analysis is used to study the effects of different factors on pumping and irrigation wells.Influence of groundwater flow field level and hydraulic gradient in aquifer area.At the same time,the groundwater flow field water level and hydraulic gradient changes under different influencing factors are compared and analyzed.A reasonable layout scheme and operation mode of pumping and irrigation well groups are proposed,and an optimized mining scheme is designed to provide a theory for the improvement and establishment of sustainable development of groundwater resources guide.