依据长江下游生态环境特点提出并概算了长江下游干流河道内最小环境需水量。
The paper puts forward and calculates the lowest environmental water demand in river course of stem stream according to the features of ecosystem and environment of lower reach of Yangtze River.
指出河道最小环境需水量是指维系河流的最基本环境功能不受破坏，所必须在河道中常年流动着的最小水量的阈值。
The lowest environmental water demands is defined as the minimum water threshold value that maintains river's basic environmental functions.
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