北方中小河流健康评价研究

Study on health evaluation of medium and small rivers in North China

文中在遵循《河流健康评估指标、标准与方法》的框架上,根据北方中小河流的自身特点、人类活动干扰以及资料的易得性,对生态流量满足程度、天然湿地保留率等指标进行优化调整。以东北地区洮儿河白城段为例,以2014年作为评估年,对比分析指标调整前后的评价结果,结果显示调整后的指标体系更符合实际情况。以3种不同典型年作为评估年,应用调整后的指标体系进行评估,结果显示不同典型年评估结果差异不大且高于调整前,更为合理。

Based on the own characteristics, human activity and the easy availability of data of the medium and small rivers in North China, following the framework of the river health evaluation indicators, standards and methods, the indicators of the satisfaction degree of ecological flow and the retention ratio of natural wetland are adjusted optimally. Taking the Baicheng City section of Taoerhe river in northeast China as an example and taking 2014 as the evaluation year, the paper analyzes and compares the evaluation results before and after indicators adjustment. The results show the adjusted indicators system is more accord with the reality situation. Taking three different typical years as evaluation year, the river health is evaluated by using adjusted indicators system. The results show the differences between evaluation results in different evaluation years are small and the result evaluated by using adjusted indicators is more rational.