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The Numerical Simulation of Evolution of Relation between River and Groundwater

Author: YangLiJun
Tutor: WangWenKe
School: Chang'an University
Course: Hydrology and Water Resources
Keywords: Numerical Simulation Near the river water Aquitard Suspension saturated zone Vadose zone
CLC: P641
Type: Master's thesis
Year: 2008
Downloads: 221
Quote: 1
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Abstract


Close hydraulic connection and frequent transforming relationship between rivers and groundwater. In recent years, the rapid development of agriculture and industry, the demand for water increasing, transforming relationship between the river and groundwater due to over-exploitation and affected by natural factors, more complex, caused by changes in the water cycle, evoked a series of the negative effects of the ecological environment, such as regional drawdown funnel extended sea (salt) water intrusion, groundwater pollution, vegetation degradation, land desertification, river depletion of water resources and ecological problems highlighted. The relationship between the river and the groundwater and its evolution is one of the important issues in rivers and groundwater interactions, are rivers to maintain the basis of renewable capacity mechanism and groundwater research. Water supply sources, often near the river water. The river recharge of groundwater is an important source of water near the river. Difficult to operate complex field conditions, using theoretical analysis, laboratory experiments and numerical simulation is a combination of the use of the percolation theory, soil water dynamics, porous media theory, numerical analysis method of multi-disciplinary, on the evolution of the relationship between the river and the groundwater research. Numerical simulation analysis of the relationship between the evolution of the rivers and groundwater influencing factors, rivers and groundwater by a unified \The following results were obtained through research: rivers and groundwater of the dynamic process of evolution (1) rivers and groundwater relations out of line direction by a unified infiltration curve evolution, diving face gradually to the river inside of depression, eventually divorced from rivers and groundwater. Hanging out of line under the riverbed saturated zone. Underground diving and hanging saturated zone between the vadose zone, with the excretion lower water level, the scope of the vadose zone is growing. Formed rivers - hanging saturated zone - aerated with - full of water with the water system. (2) the relationship between the river and the groundwater numerical simulation of evolution based on saturated - unsaturated flow theory to establish the mathematical model of the river and groundwater systems, the use of the GMS in the SEEP2D module analog rivers and groundwater relations the dynamic process of evolution, the simulated and measured results good agreement, the reproduction the indoor physical phenomena and laws of the experiment, the correct response to the evolution of both. (3) the relationship between the river and the groundwater evolution factors rivers and groundwater in the relationship between the evolution of the many factors, combined with laboratory experiments and numerical simulation, the main riverbed shape, river water level, the excretion of water level, the river bed aquitard the aquifer sandwich river - groundwater evolution of relations. The above studies provide a scientific basis for the evaluation along Lot groundwater resources and the sustainable use and protection of the ecological environment.

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CLC: > Astronomy,Earth Sciences > Geology > Hydrogeology and Engineering Geology > Hydrogeology (groundwater hydrology )
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