The #Saralbhanga #River (also called Swrmanga) that flows from Sarphang district of #Bhutan to #Assam in #India. About 500 #farmers from five #villages close to the #international #border contribute to building, repairing and maintaining this #check #dam on the river, a #traditional diversion based #Irrigation system of the #Bodo tribe, which is called the Dongo or Jamfwi system.