基于水生态功能分区的辽河流域控制单元划分

Control unit zoning based on water eco-functional regionalization for the Liaohe river basin in Liaoning province

基于控制单元的水质目标管理可以使复杂的流域水环境问题分解到各控制单元内,而控制单元划分是实现基于控制单元水质目标管理的必要环节。基于水生态功能分区,在控制单元划分理论、原则与方法研究基础上,在GIS技术支持下,实现了辽河流域控制单元划分。结果表明:根据辽河流域自然地理指标、水生态环境指标和社会经济指标,将该区域划分为5个一级控制单元、56个二级控制单元、245个三级控制单元。研究成果可以为建立基于控制单元的辽河流域水环境质量管理体系提供技术支持。

Tbe control unit zoning is a necessary process to implement the water quality management based on the control units, by which the complex issues in the water environmental management of fiver basin can be distributed to the different control units. According to the control unit zoning theory, principles and methods as well as the wa- ter e.co-functional regionalization results, the control units for the Liaohe fiver basin in Liaoning province were zoned and adjusted with the GIS technology. The results indicate that the control units of the fiver basin are classi- fied into three levels, and the number of the first level, the second level and the third level control units are 5,56 and 245, respectively based on the indices of physical geography, water ecological environment and social econo- my. The above results can provide the technical support for establishing management system of the water environ- mental quality based on the control units.