摘要
水环境承载能力评价可为地区经济发展和生态环境保护提供重要依据,为精准查明张掖市水环境承载力状况,基于各区县重点开发区、重点生态区和农产品主产区3种不同主体功能定位,从水资源、排放强度、水环境质量和水生态4个维度选取合理指标,构建了复合型水环境承载力评价指标体系,利用层次分析法和综合指数法评价了2018—2020年各区县水环境承载力。结果表明:2018年各区县评价指数介于63.9~79.4,民乐县和高台县为临界超载,其他县区不超载;2019年评价指数介于63.2~86.9,临泽县、民乐县和高台县为临界超载,其他县区不超载;2020年评价指数介于70.6~88.6,六县区均处于不超载状态,总体张掖市的水环境承载能力现状良好,且逐年提升。但临泽县、山丹县、民乐县和高台县刚脱离“临界超载”,“不超载”状态优势不存在,仍有较大提升空间。不同功能区4个指标对水环境承载力的影响程度有所差别,重点开发区影响程度较大评价指标为排放强度和水环境质量指数,重点生态功能区为水生态指数和水环境质量,农产品主产区为水资源和排放强度指数,在改善提升不同功能区水环境承载力时应注意上述指标。
The evaluation of water carrying capacity can provide important basis for regional economic development and ecological environment protection.In order to ascertain accurately the water carrying capacity status of Zhangye City,an evaluation index system was constructed,based on the main function positioning of each district and county,reasonable indexes from the four dimensions of water resources,discharge intensity,water environment and water ecology were selected.Using analytic hierarchy process and comprehensive index method,the water carrying capacity of each district and county were evaluated,the results showed that the assessment index ranged from 63.9 to 79.4 in 2018,Minle county and Gaotai county are critical overloads,the other counties are not overloading.The assessment index ranged from 63.2 to 86.9 in 2019,Linze county and Minle county and Gaotai county are critical overloads,the other counties are not overloading;the assessment index ranged from 70.6 to 88.6 in 2020,all districts and counties are not overloading,which indicates that the water environment carrying capacity of Zhangye City is in good condition in general and has increased year by year.However,Linze County,Shandan County,Minle county and Gaotai County have just broken away from“critical overload”,and the advantage of“no overload”state does not exist,and there is still much room for improvement.Different functional zones have different impacts on water carrying capacity,emission and water quality have higher impacts in the major development zones,water eco-index and water environment quality have higher impacts in the eco-function areas,water resources and emission intensity index have higher impacts in the main agricultural production areas.It is attentted the above indicators when upgrading the water carrying capacity in different functional areas.
作者
王具文
王金哲
巴淼
黄小龙
姜建旭
汪嘉逸
刘敏
WANG Ju-wen;WANG Jin-zhe;BA Miao;HUANG Xiao-long;JIANG Jian-xu;WANG Jia-yi;LIU Min(Institute of Hydrogeology and Engineering Geology of Gansu Bureau of Geology and Mineral Exploration and Development,Zhangye 734000,China;Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang 050061,China)
出处
《科学技术与工程》
北大核心
2023年第11期4790-4800,共11页
Science Technology and Engineering
基金
国家自然科学基金青年科学基金(41902262)
国家重点研发计划(2017YFC0406106)
国家地质调查项目(DD20190349)。
关键词
黑河流域
张掖市
主体功能区
水环境承载力
Heihe River Basin
Zhangye City
the main functional area
water environment carrying capacity
