左江流域健康评估与思考

Health assessment and thinking of Zuojiang River Basin

以水利部《河流健康评估技术导则》为指导,对广西左江干流及流域内集雨面积大于1000km^2的一级支流进行河流健康评估。构建了左江流域健康评估指标体系,并从河流系统生态完整性(包括水文水资源、物理结构、水质和生物4个准则层)、社会服务功能完整性及其相互协调性对左江健康进行综合评估,最终明确左江流域主要河流健康状况和存在的问题,掌握左江及主要支流健康变化规律。此外,还探讨了河流健康评估的一些技术问题。

Guided by the Technical Guidelines for River Health Assessment of the Ministry of Water Resources , river health assessment was conducted for the main stream of Zuojiang River and its first tributaries each with a catchment area over 1000km^2. For Zuojiang River basin, the health assessment index system is set up, comprehensive health assessment was made from the ecological integrity of river system including four criteria layers of hydrology and water resources, physical structure, water quality and biology, and from the integrity and mutual coordination of social service function. The health status and existing problems of main rivers in Zuojiang River Basin are identified. The health change law of Zuojiang River and its main tributaries is known. Furthermore, the authors also discuss some technical issues about river health assessment.