Comprehensive treatments of groundwater over exploitation in arid oasis city: A case of Korla city in Xinjiang
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Abstract:
The over exploitation of groundwater has resulted in a series of environmental and geological problems,such as,the decline regional groundwater level,sparse vegetation along the Peacock river,and deterioration of water quality.It seriously limited the local economic development and human production and life in Korla city,Xinjiang.The dynamic monitoring data of groundwater in Korla city was used in this study to address this over exploitation problem with three methods,i.e.,water level dynamics method,exploitation coefficient method and cause effect method.It was founded that the buried depth of groundwater in Korla city increased with time.The maximum descending rate of groundwater level was 5-33 m/a from 2003 to 2017,and the maximum exploitation coefficient was 6-18 among all townships.The total over-exploitation areas of groundwater in Korla city was 819-86 km2,including severe over exploitation area of 709-98 km2 and moderate over exploitation areas of 109-88 km2.The scientific based and rational exploitation control plans and countermeasures were proposed to provide guidance for the rational utilization of water resources of groundwater of oasis cities in arid.
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