The Sangkhuwa is a

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of ...

and valley in the Sankhuwasawa District. It is a tributary of the Arun.

References

Rivers of Koshi Province {{Nepal-river-stub