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Study on the Groundwater Resource and Groundwater Circulation in Caofeidian

Author: WangDan
Tutor: HuFuSheng
School: Chinese Geology University (Beijing)
Course: Groundwater Science and Engineering
Keywords: Caofeidian Groundwater circulation The proposed budget for the amount of resources Numerical Simulation
CLC: P641.8
Type: Master's thesis
Year: 2011
Downloads: 166
Quote: 1
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Abstract

The Caofeidian Engineering in 1992 began to plan the development and construction started in 2002. Groundwater occupies a pivotal position in the construction of Caofeidian, realize the coordinated development of economic and social resources and environment, a reasonable evaluation of groundwater resources. Understanding of groundwater occurrence, rational planning of groundwater exploitation has profound significance. Groundwater circulation patterns and the amount of groundwater resources is the basis of the evaluation of groundwater resources, can guide the development and utilization of underground water, to determine favorable mining lots and allowable withdrawal. Based on the above understanding, determine the goal of this paper is the establishment of the Caofeidian areas groundwater circulation mode, the establishment of regional groundwater flow numerical model, to clear the area of ??water resources, and to provide a basis for the development and utilization of groundwater resources in the area. The study area is divided into two layers of water resources estimates. Shallow groundwater recharge 83430.78 × 10 ~ 4m ~ 3 / a, mainly from precipitation, followed by boundary lateral inflow, irrigation return leakage amount of recharge and surface water; the shallow groundwater excretion 86122.38 × 10 ~ 4m ~ 3 / a, the excretion pathway artificial mining, diving evaporation, and more stream excretion and border lateral excretion. Deep groundwater recharge 23994.92 × 10 ~ 4m ~ 3 / a, mainly from shallow leakage recharge boundary lateral recharge of deep groundwater excretion 23394.62 × 10 ~~ 4m 3 / a, most of them for the exploitation of , followed by the lateral outflow. Intuitive reveal the the groundwater cycle characteristics and control factors, this article using the typical profile of a two-dimensional numerical simulation. Groundwater flow cone of depression formed by the Yanshan piedmont to Bohai runoff, shallow brackish water at the junction of the local impact of mining, diving to form a watershed between bits in Tanghai with Coast; deep upper part by the decline in mining impact head, the lower part of the water by the piedmont runoff into the sea. Vertical, different layers or depth of groundwater exchange. Topography and aquifer structure the background factors control the cross-section of groundwater flow, the larger the area's groundwater exploitation, development of the groundwater flow system, groundwater flow direction and runoff velocity have a greater impact. The local circulation of groundwater in the typical profile excretion evaporation and shallow mining, the middle loop system main excretion artificial exploitation of the deep the regional circulatory system undersea excretion. Piedmont lateral runoff supplies are mainly concentrated in the local loop and the middle circulatory system, the regional circulatory system cycle intensity is relatively much smaller. Deep runoff small amount of upward leakage recharge mining. Section simulation results that, seawater intrusion did not occur in the current mining conditions. Caofeidian numerical model of groundwater flow, by identifying correction, the water level fitting error is less than 2m, accounting for 95.63%, consistent simulation of the flow field with the measured flow field simulation balancing item and Water Resources estimates consistent. Of the proposed model is better, can be used to predict further.

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