How wide is a river in general?
河的称谓没有大小之分，短且窄的河流称之谓小河，大且长的河流称之为大江，世界上最大的河是亚马孙河，流量巨大，河口宽度在几百公里，入海口的地方有很大的海域面积都是淡水，最短的河是承德的热河，一泉成河，只有几百米长，好像最小的河在内蒙古，小到一条大点的鱼都能堵塞河道。
Professional answer
There is no distinction between big and small rivers. Short and narrow rivers are called small rivers, and large and long rivers are called big rivers. The largest river in the world is the Amazon River, which has a huge flow and a river mouth that is several hundred kilometers wide. There is a large sea area at the mouth of the river that is all fresh water. The shortest river is the Rehe River in Chengde, which is formed by a spring and is only a few hundred meters long. It seems that the smallest river is in Inner Mongolia, which is so small that a large fish can block the river.
8 to 15 meters.
1. For rivers with embankments, it is within the range of 8 to 15 meters on both sides of the outer slope foot line of the embankment.
2. For rivers without embankments, it is within the range of 8 to 25 meters on both sides of the upper mouth line of the river.
3. For flood and tide control seawalls, it is within the range of 30 to 50 meters on each side of the inner and outer slope foot lines of the embankment. Legal basis: Article 21 of the Flood Control Law of the People's Republic of China.
This difference is too big, there are small rivers a few meters wide, and there are also large rivers a few kilometers wide.
Generally, the width of tributaries is within 100 meters. The main stream is not less than 500.
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