The name Sundarijal was derived from the term , which means 'beautiful' and , which means 'water'. The river Bagmati, which originates in this region, has been the major source of water supply for Kathmandu valley since the
Rana Dynasty. There is also a Hindu goddess, , with a temple dedicated to this name. Sundarijal Hydropower Station, located at Sundarijal, northeast of Kathmandu with previous installed capacity of 640KW, now upgraded to 970 KW + 10% with fully customized automation from July 2021 under rehab works by contractor Power Mech Project Ltd. It has a kW and annual design generation of 4.77 GWh and was commissioned in 1934 in a grant from British government. It was Nepal's second oldest Hydropower Electricity Project then. In 1960, leaders from the
Nepali Congress party
B.P. Koirala (then prime minister),
Ganesh Man Singh,
Krishna Prasad Bhattarai,
Diwan Singh Rai, Ram Narayan Mishra,
Yogendra Man Sherchan, and
Jaman Singh Gurung were taken to Sundarijal Military Detention Camp. They were held there without trial for eight years due to their participation in
the 1960 coup. ==Geography and climate==