source lake 河源湖
rivulet 小溪
creek, brook 小河
canyon, gorge 峡谷
waterfalls 瀑布
tributaries, streams 支流
rapids 急流
valley 流域
north fork 北叉
branches 分支
south fork 南叉
point 汇合点
alluvial fan 冲积扇
right bank 右岸
left bank 左岸
oxbow lake 牛轭湖
downstream 顺流而下
upstream 逆流而上
ait 江心岛
swamp, marsh 沼泽
flood land 河滩地
main channel 主水道
islands 岛
distributaries 分流
delta 三角洲
sand bar 沙洲
cross section of river 河流断面
river channel 河道
dike 堤
natural levee 天然堤岸
river bed 河床
valley 河谷
gorge 峡谷
V-shaped valley 幼年谷
widened V-shaped valley 青年谷
U-shaped valley 壮年谷
synclinal valley 老年谷
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