|major river systems in Nepal|
Sapta Kosi System (exits Nepal @ 26.49, 86.91)
Main tributary rivers : Tamor, Arun & Sunkoshi (@26.91, 87.16)
Tributary Sun Koshi: Dudh Koshi(@27.15, 86.43), Likhu (@27.25, 86.20), Tamakoshi (@27.35, 85.98) , Bhote Koshi (27.73, 85.78) and Indrawati (@27.64, 85.71)
Tributary of Arun: Barun river (@27.69, 87.36)
Sapta Gandaki/Narayani System
Left: Trishuli, Budhi Gandaki River, Marshyangdi, Seti Gandaki, Madi River.
Trisuli: Trisuli originates in Tibet where it is called Kirong Tsangpo. It enters Nepal near Rasua Gadhi international border. Langtang River meets Trisuli (@28.16, 85.35). Before that Chilime Khola meets Trisuli at Syapru Besi (@28.18, 85.34).
Budhi Gandaki: This river serves as the border between Gorkha and Dhading Districts. Buri Gandaki meets Trisuli (@27.82, 84.78).
Marshyangdi : Daraudi River meets Marshyangdi (@27.91, 84.55) and River (@27.956, 84.422). Chepe meets Marshyangdi @(28.06, 84.48). Paudi Khola, a small stream meets Marsyangdi (@28.11, 84.43) and above that Dardi River meet Marshyangdi (@28.17, 84.45).
Seti: Seti Gandaki originates near Machhapuchchre mountain range. It flows through Pokhara and meets Trisuli-Marshyangdi River (@27.82, 84.45) before merging with Kali Gandaki.
Madi River originating near Annapurna II merges with Seti near Damauli (@27.97, 84.27). Tributary of Madi are Risti khola (@28.08, 84.24) and (@28.15, 84.22).
Right: Kali Gandaki River (origin @29.06, 84.09). KaliGandaki meets rest of the rivers at Devghat (@ 27.74, 84.42). Tributary of Kali Gandaki River : Maidi Khola (@27.88, 83.94). Kaligandaki Hydropower plant is at Mirmi, Syanjya (@27.98, 83.58).
Bheri River originates in Dhaulagiri Mountain range. It meets Karnali at Surkhet (@28.74, 81.26).
Right Karnali, Seti, Humla Karnali, Mugu Karnali
Karnali River serves as the eastern border of State-7 districts like Kailali, Doti and Achham.
Humla Karnali & Mugu Karnali meets (@29.62, 81.85) to form main Karnali River.
Karnali river flows to India as Ghaghara River which ultimately merges to Ganga.
West Rapti River
This rivers mainly flows in State no 5 of Nepal. This river does not meet Karnali in Nepal, it flows through Gorakhpur, UP and merge into Ghagra River at (@26.29, 83.67).
Bagmati System (state 2&3)
Tributaries in Kathmandu valley
Bisnumati River < Manamati River
Hanumante Khola > Godawari Khola > Lubhu Khola
> Nakhu Khola
Kankai/Mahananda System (state 1)
Rivers/Khola on EastWest Highway (from east to west)
Mechi (26.65, 88.16)
Biring Khola (26.64, 87.94)
Ratuwa Khola, Damak
Betani Khola, Damak
Teli Khola, Urlabari-Mangalbare
Pathari Khola, Pathari
Tengra Khola (itahari)
Sewti Khola (inaruwa)
Balan River, Lahan
Lal Bakaiya River
GANDAKI RIVER (Narayani)
Pathar Khola, Kawasoti
Tinau Khola, Butwal
Dano Khola, Butwal
West Rapti River
Koshi agreement, uchcha bandh & barrage