中文摘要：

水生态红线是水生态环境保护的重要途径,将从管理机制上为水生态安全提供更可实施的保障。本文通过对水生态系统表象特征和水生态系统演化过程的关联分析,提出了水生态保护的红线框架体系：水量红线、空间红线和水质红线,阐释了三条红线间的相互关系及其内涵。综合生态需水、淹没面积、生态健康评价方法,嵌入我国生态环境保护相关规范,提出了兼顾自然和社会属性的水生态红线分级方法,建立了水生态红线指标体系。以淮河水系淮滨、王家坝和蚌埠断面为例,进行了水生态红线划定的示例应用。本文提出的三位一体的水生态红线框架体系和红线划定方法,弥补了水生态保护红线机制研究的空缺,为水生态保护研究与实践提供了新的思路和方法。

英文摘要：

Aquatic ecological red-line is an important method in water eco-environment protection, whichprovides a more feasible management mechanism for protecting water ecological security. By analyzing the re-lationship between the characteristics of aquatic ecosystems and ecological processes,this article proposes aframework for aquatic ecological red-line which contains magnitude red-line, spatial red-line and waterquality red-line, and analyzes the interaction among these three kinds of red-lines and their connotations.Based literature research in methods of environmental flow, inundated area, ecosystem health assessment,etc.,considering rules and regulations about environment protection in China,a defining method which com-bines natural attributes with social attributes is put forward. Three cross-sections（Huaibin, Wangjiaba andBengbu） in the Huai River basin are chosen as examples to set aquatic ecological red-line. This study fillsin gaps in aquatic ecological red-line and has profound meaning to further research.