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Study on Groundwater Table Control and Management in Representation Areas of China

Author: ChenWenFang
Tutor: ShaoJingLi
School: Chinese Geology University (Beijing)
Course: Hydrology and Water Resources
Keywords: Groundwater level Control management Appropriate water level Critical water level Typical areas
CLC: P641.8
Type: Master's thesis
Year: 2010
Downloads: 275
Quote: 4
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Abstract


China is the groundwater resource endowments abundant countries, groundwater resources occupies a pivotal position in the national water resources. In recent years, due to groundwater existence of irrational exploitation and weak management issues, evoked a series of ecological, geological, environmental problems, these problems are directly or indirectly related to the changes in the groundwater table. Therefore, the groundwater level control management research has important implications for the control and improvement of the groundwater environment. Changes in the groundwater level is the most direct form of expression of the amount of groundwater resources, controlling the most important indicators of groundwater management. The papers from the of groundwater exploitation status quo and existing resources, ecological and geological environment, the optimal two groundwater level control and management of the water level and the critical water level indicators, a combination of theoretical analysis and practical results, the regional macroeconomic analysis with typical area depth analysis of the combination of research methods, from point to plane, typical areas of the North China Plain, Northwest Territories, as well as coastal areas, groundwater levels from the local to the overall control study proposed groundwater level control principles, the basis and method, and gives the corresponding appropriate water level and critical water level. (1) for the development and utilization of groundwater in the North China Plain status quo and its impact on the groundwater environment, analyzing the relationship of of groundwater environmental issues and the groundwater level, given the corresponding groundwater suitable water level and the critical water level. The Groundwater regulation and storage of appropriate water depth of 10m, the critical water level of the average annual groundwater overexploitation coefficient of 0.3 or other serious overexploitation state corresponding to the water level; in the eastern part of the shallow control soil salinization appropriate water depth of 2 ~ 3m, control cracks suitable water depth of 7m; deep control land subsidence suitable water depth of 50m; the karst collapse groundwater suitable water level should be controlled in karst aquifers overlying unconsolidated rock bottom elevation (2m) above; city landfill area groundwater suitable water level should be below the landfill floor 1m. (2) for the Northwest groundwater development situation and existing ecological problems, the relationship between the ecological problems and the groundwater level, which natural oasis control natural vegetation decay groundwater water depth of 2.0 (2.5) to 4.0 (4.5 ) m. The the artificial oasis irrigation period control soil salinization of groundwater water depth of 1.2 ~ 1.5m, non-irrigation interim freeze groundwater water depth 1.3 ~~ 1.5m, the thaw period of 2.2 to 2.7m. (3) analysis of the judgment of the seawater intrusion, groundwater levels and the relationship of the Cl-content analysis, production practice, given the appropriate water level of seawater intrusion in the groundwater funnel center water level elevation -5 to-6m critical water level - 8m. On this basis, the analysis of the groundwater level control based on the total amount of groundwater water control objectives, principles and methods for groundwater level control and management oversight and implementation of the requirements and recommendations of the current situation and problems of China's water resources management, these has important practical significance for the scientific management of groundwater resources, to achieve the sustainable use of water resources.

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