In this paper,author probes into studies of EWR theory, EWR theory of river,EWR theory of city river in chengdu and so on , using methods of theoretical investigation,example analysis and validation.

• 本文以理论研究和实例分析、验证相结合的方法，主要开展了生态需水理论、河流生态需水理论、成都市城市河流生态需水等方面的分析研究。