river discharge 河道流量

flood discharge river 行洪河道

fluctuation of river discharge 河量变动

discharge of river 河流径流

safety discharge in river 河道安全泄量

open-river discharge 畅流河流泄量

river sediment discharge 河流输沙量

discharge for river maintenance 河川维持放流

pollution discharge into river 入河排污

discharge sth into a river 把…排入河流