世界上最短的河流是哪一条?

世界上最短的河流：Roe河

在密苏里河和大泉（Giant Springs）之间流动的Roe河，仅仅有61米长，号称世界上最短的河流。

但美国Oregan的D河(37米）也号称是世界上最短的河流，不过这条河的长度会经常变化，所以没有取代Roe河的记录地位。
According to some sources the world's shortest river is Oregon's D River. It flows from Devil's Lake into the Pacific Ocean near Lincoln City on the Oregon Coast. It is generally described as being 120 feet (37 metres) long.

参考资料：http://www.peacehall.com/news/gb/misc/2007/03/200703111149.shtml

中国河北省承德市避署山庄内流经的热河。