Nepal's River System

Nepal's River System

• The major river system namely the Koshi, the Karnali and the Gandaki belong to the antecedent group. 

Nepal's River System

Tourist attractions :

• Rivers originating from the Mahabharat range and cutting through Churia hills come under the second group, these include Kankai, Bagamati, Kamala etc. the third group of rivers originate from the southern face of the Churia hills. 
• For the purpose of commercial rafting rivers trips are Bhotekoshi, Sunkoshi, Tamur, Kaligandaki, Karnali, Seti khola, Trishuli, Bheri, upper sunkoshi, Marshyngdi, lower arun ,  dudha koshi, and Seti Karnali.

Nepalese rivers can be grouped into three categories on the basis of their origin.
1. Antecedent to Himalaya
2. After the Mahabharat
3. After the Churia Range

• Antecedent rivers belong to the period prior to the rise of the Himalaya, these rivers added their tributaries during or after the Himalayan origin along with the development of monsoon climate. 
• After the formation of Mahabharat hills, the antecedent rivers changed their courses as Mahabharat stood as a barrier. 
• As a result, most of the these rivers were responsible to deposit the sediments in the Churis basin.