水土保持通报2012，Vol.32Issue(5)：32-36,60,6.
汉江流域上游生态环境现状及治理措施
Eco-environmental Status Assessment and Countermeasures in the Upper Hanjiang River Basin
摘要
Abstract
The upper Hanjiang River basin is the water source area of the middle route of the south to north water transfer project.Thus,water conservation and eco-environmental construction in the middle route of the south to north water transfer project is of great importance.Due to serious water environment pollution and soil erosion in the upper reaches of Hanjiang River,the ecosystem of the basin is degrading.Water samples were measured and soil and water loss was analyzed based on the observed data.Results showed that(1) water quality of Ankang Reservoir declined,especially nitrate nitrogen(NO3—N) increased from 0.32 to 0.99 mg/L 20 years after water storage,increasing by 209.3%.(2) Water quality of Danjiangkou Reservoir was relatively better,but the average annual total nitrogen was in the Ⅳ grade and other indexes of water quality were in theⅠorⅡgrade.(3) Soil and water loss increased.In 2009,the total erosion modulus in the whole basin was more than 5 000 t/(km2·a);in Ankang City(7 counties/district),as high as 16 352 t/(km2·a);and in Shiyan City,3 528 t/(km2·a).The total amount of soil erosion was in the order of Ankang(7 counties/district)Hanzhong(7 counties/district) Shangluo(3 counties/district)Shiyan,which shows an increasing tendency.Therefore,the following countermeasures are put forward: strengthening water environment pollution control,enhancing soil and water conservation and legal system construction,improving eco-environmental protection management and strengthening environmental infrastructure demonstration for private engineering project.关键词
汉江流域/生态环境/水环境/治理措施Key words
Hanjiang River basin/eco-environment/water environment/countermeasures分类
资源环境引用本文复制引用
赵佐平,闫莎,同延安,魏样..汉江流域上游生态环境现状及治理措施[J].水土保持通报,2012,32(5):32-36,60,6.基金项目
陕西省教育厅专项科研计划项目 （）
陕西理工学院校级科研项目 （）
