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Study on the Sustainable Yield of Groundwater in Yanqi Basin, Xinjiang

Author: WangPeng
Tutor: QianJu
School: Lanzhou University
Course: Hydrology and Water Resources
Keywords: Yanqi Basin Groundwater Ecological water level Numerical Simulation Sustainable exploitation
CLC: P641.8
Type: Master's thesis
Year: 2009
Downloads: 212
Quote: 1
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Abstract

Yanqi Basin is located in the Tianshan Mountains, Xinjiang Uygur Autonomous Region. In recent years, due to the large number of unjustified reference to surface water irrigation, making the entire basin of the middle and lower reaches of the plains groundwater levels generally rise about 62 percent of the irrigation area groundwater depth less than 2m plain area of ??most severe salinization of soil into the Bosten Lake reduce the amount of water, the shrinkage of the lake surface, a lot of farmland drainage vent into the Bosten Lake at the southeast of the basin, resulting in elevated lake salinity Lakes region of the deterioration of the ecological environment. The study does not cause surface deterioration of the ecological environment, sustainable exploitation of groundwater is of great significance to alleviate or solve the current ecological and environmental problems of the Yanqi Basin. Content and findings of this research are mainly the following three aspects: (1) Based on previous studies, the water level of the Yanqi Basin Groundwater Ecology theoretical study that the ecological water level ceiling, which is to prevent salinization of the water level for the depth 3.2 m about the minimum ecological water level, the the diving evaporation limit depth of about 4m, when the groundwater table maintained at about 3.2-4m vegetation will not be degraded, the ecological environment will be protected. (2) on the basis of analysis of the hydrogeological conditions of the Yanqi Basin, the establishment of a three-dimensional model of the groundwater system dynamics simulation of groundwater flow field from the groundwater observation wells, water level, water balance simulation model demonstrated through the identification and testing of the model, reliability and can be used for the feasibility study of groundwater development and utilization of, and lay a good foundation for the study area groundwater extraction program. (3) combined with ecological groundwater table of Yanqi Basin groundwater sustainable yield good numerical model based on the establishment of a research design six groundwater mining plan, mining total of 37729 × 10 - 4m ~ 3,42587 × 10 - 4m ~ 3,47392 × 10 ~ 4m ~ 3,52245 × 10 ~ 4m ~ 3,57045 × 10 ~ 4m ~ 3,61902 × 10 ~ 4m ~ 3, the different mining program is loaded into the model and run the model until the supplement groundwater system, the row items reached stable operating results from the water balance, Water Resources Transformation in the groundwater level, diving down deep the aspects combined ecological groundwater table analysis, the sustainable exploitation of the study area is 52245 × 10 ~ 4m ~ 3 (program), the groundwater resources of the study area 42102 × 10 ~ 4m ~ 3 mining space (The groundwater resources exploitation 10143 × 10 ~ 4m ~ 3), so you can use this part of the groundwater resources reduce surface water resources in reference to the amount of water, which will reduce the diving depth of combat salinization, increase the amount of Bosten Lake into the lake and important to the downstream the Peacock River watershed lose water.

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