中文摘要：

本文回顾了环境流评价方法从简单的水文公式到水文变化生态限度方法（ELOHA）的发展历程。讨论了环境流的理论要点,如自然水流与径流调节水流的区别;水文情势改变-生态响应关系以及水生态系统阈值等问题。文章还评论了环境流方法应用的若干问题,包括生态需水概念;技术文件中引用国外文献的完整性和准确性;加强数值模型研究和软件开发;推行适应性管理策略。

英文摘要：

The development of environmental flow assessments methods were reviewed in this paper, fromsimple hydrological formulas to ecological limits of hydrological alteration（ELOHA）. The major points of En-vironmental Flows were discussed,such as the difference between nature flow and regulated flow,hydrologi-cal alteration-ecological response relationships, thresholds of aquatic ecosystem and so on. The commentsupon issue about environmental flows application were made, including concept of ecological water require-ment, integrality and veracity of bibliographic citation in technique criterion, enhancement of models ands oftware development,and adaptable management strategy.