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《Journal of Chongqing Jiaotong University》 2006-04
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Discussion on water security problem and countermeasure in Minjiang River

WANG Miao-lin~(1,2),GUO Li-juan~1,GAO Pan-yu~1,FU Hua~3 1.Bureau of Hydrology & Water Resources Survey of the Upper Yangtze River,Chongqing 400014,China;2.Key Laboratory of Water Cycle & Related Land Surface Processes,Institute of Geographical Sciences & Natural Resources Research,CAS,Beijing 100101,China;3.School of River & Ocean,Chongqing Jiaotong University,Chongqing 400074,China  
Along with the development of economy and society,water security problem becomes increasingly serious.Especially,the issue of water shortage,water pollution and related eco-environmental degradation has become one of the major emergency problems in China.The water security problem was discussed,including water quantity,water quality and related eco-environmental security.As an example,the issue of water security problem in Minjiang River was analyzed.It was found that influenced by human activities and the development of economy and society,the water security and related eco-environment have been threaten in Minjiang River: a)Water quantity in Minjiang River reduced.It was found that the runoff in Minjiang River decreased obviously.The average annual runoff from 1970s to 1980s decreased 9.5% compared with that from 1930s to 1940s.And the ground water resources reduced too: the ground water level descent about 10m.The flood and drought became more frequent.b)Water pollution in Minjiang River shrew a tendency to aggravate.The comprehensive water pollution index at Gaochang Station was 0.21 in 1996,but it increased to 0.34 in 2000.And the rank of water quality changed from "relatively cleaning" into "light pollution".c)Related eco-environment degraded.The forest area in the upper reaches of Minjiang River reduced and the aridity river valley expanded.Water loss and soil erosion had the tendency to aggravate too.According to the above changes in Minjiang River,some suggestion and countermeasure for protecting the water security and eco-environment were proposed: Firstly,the idea of sustainable utilization of the water resources must be set up;Secondly,regard the carrying capacity of the water resources as the prerequisite,advance the development of water conservancy and economic coordination;Thirdly,establish the water resources protection area and prevent and control the water pollution.
【Fund】: 国家重点基础研究(973)项目(2003CB415205);; 重庆市自然科学基金项目(CSTC2005BB0117)
【CateGory Index】: TV213.4
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