The ice blocks up the river, making the upstream water unable to flow.
冰把河道堵住了，上游的水流不下来。
Downstream of the upstream water too much, cause water shortage, block;
上游未经处理排出的废污水，造成下游河道污染；
A barrage would halt the flow upstream and lift the water level.
一道拦河坝将会在上游拦住水流，抬升水位。
Upstream, to find the source of water.
⊙、逆流而上，才能找到水的源头。
In this paper, the environmental water demand in the upstream of Hanjiang River is studied.
对汉江上游的生态环境需水量进行了初步探讨。
In this paper, the environmental water demand in the upstream of Hanjiang River is studied.
对汉江上游的生态环境需水量进行了初步探讨。
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