| Piyain River | |
|---|---|
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| Location | |
| Countries | India,Bangladesh |
| District | Sylhet |
| Physical characteristics | |
| Source | |
| • location | Umgat river ofAssam |
| Mouth | |
• location | Surma River |
| Length | 145 km (90 mi) |
Piyain River atrans-boundary river ofIndia andBangladesh. It is a tributary of theSurma river, which originates from theUmngot River inMeghalaya. The river entersBangladesh throughSylhet district.
The Piyain River, once large and flowing, has been left mostly dry due to floods in the 1980s, unregulated stone quarrying, and illegal sand extraction.[1][2]
The length of the river is 145 km.[3]
Originating from the Umngot, the river enters Bangladesh through the Jaflong area of Gowainghat, where it divides into two parts.[2]