Karnali River Basin
Tributaries
Chhoti Gandak is a groundwater-fed meandering river originating near Dhesopool, Maharajganj district of Uttar Pradesh. It travels a distance of about 250 km and joins Ghaghara near Gothani, Siwan district of Bihar. The Chhoti Gandak River Basin is located between 26°00' to 27°20' N latitude and 83°30' to 84°15' E longitude. Right bank tributaries are Khekhra, Hirna, Jethan, Maun, Duhari, Kanchi and Koilar rivers; Khanua river joins from the left bank. The discharge of Chhoti Gandak is mainly controlled by rain, which is very high during the monsoon season and low during the summers. It has been observed that whenever precipitation is high in the catchment areas, there is flood in the downstream part of the Chhoti Gandak River Basin. The region exhibits upland terrace surface, river valley terrace surface, present-day river channel with narrow flood plains, natural levee, and point-bar deposits. All these geomorphic features are depositional in nature and made up of alluvium of different ages.The main tributaries of the Karnali are: the Seti, the Bheri
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