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| Bagmati River | |
|---|---|
| Name | Bagmati River |
| Country | Nepal; India |
| State | Bagmati Province; Bihar |
| Length km | 621 |
| Source | Shivapuri Hills |
| Mouth | Ganges (via Kamala River basin) |
| Basin countries | Nepal; India |
Bagmati River The Bagmati River flows from the Shivapuri Nagarjun National Park area of the Himalayas through the Kathmandu Valley into the plains of Terai and onward into Bihar, joining larger river systems en route. The river is central to the geography of Kathmandu and the spiritual life of Pashupatinath Temple, while also being the focus of transboundary water management involving Nepal and India. Rapid urbanization in Kathmandu District and agricultural expansion in Rautahat District have altered its hydrology and ecology.
The name derives from Sanskritic traditions linked to Pashupatinath Temple, Hinduism, and the deity Pashupati, with associations to Shiva and classical texts like the Mahabharata and Ramayana. Pilgrimage practices at Pashupatinath and cremation rites in Pashupati Area connect the river to ritual life practiced by communities in Kathmandu Valley, Lalitpur District, and Bhaktapur District. Festivals such as Biska Jatra, Gai Jatra, and Teej incorporate processions and rites along the riverbanks, while institutional stewardship historically involved royal patrons from the Malla Dynasty and later rulers like the Shah Dynasty.
The Bagmati rises on the southern slopes of the Himalayan foothills near Shivapuri in Kathmandu District and traverses urban corridors including Budhanilkantha, Thapathali, Kirtipur, and Hetauda before entering the plains of Bara District and Rautahat District in Nepal and crossing into Siwan District and Saran District in Bihar. Major transport crossings include bridges near Pashupatinath, the Babarmahal area, and crossings of the Prithvi Highway and the East-West Highway. The Bagmati basin overlaps administrative units such as Bagmati Province and hydrological zones recognized by the Department of Water Resources and Irrigation (Nepal).
Seasonal flows are dominated by summer monsoon precipitation from the Indian monsoon system and snowmelt contributions from higher Himalayan catchments. Gauge stations monitored by the Department of Hydrology and Meteorology (Nepal) record peak discharges during June–September and low flows in December–February. Notable tributaries and sub-basins include the Manohara River, Balkhu Khola, Nakkhu Khola, Hanumante River, Dhobi Khola, and Dadhikot Khola, each draining urban and peri-urban watersheds around Kathmandu Valley and impacting sediment load and flood risk. Sediment transport is influenced by erosion in the Siwalik Hills and land-use changes in Sindhupalchok District and Dolakha District.
Rapid urban growth in Kathmandu Metropolitan City and industrial activity in zones such as Balaju and Koteshwor contribute untreated sewage, effluent, and solid waste to the river corridor. Key pollution sources include discharge from municipal systems overseen by the Kathmandu Metropolitan City, industrial effluents from factories registered with the Ministry of Industry (Nepal), and agricultural runoff from irrigated zones in Bara District and Rautahat District. Water quality assessments by institutions like the Water and Energy Commission Secretariat indicate elevated biochemical oxygen demand (BOD), fecal coliform counts, and heavy metals downstream of urban centers. Flooding exacerbated by channel encroachment, unplanned settlements like those along the Bagmati floodplain, and deforestation in upstream catchments has prompted studies by the International Centre for Integrated Mountain Development (ICIMOD), the World Bank, and bilateral agencies.
Riverine habitats along the Bagmati support riparian vegetation including species recorded in surveys by the National Trust for Nature Conservation and the Department of National Parks and Wildlife Conservation (Nepal)]. Wetland patches near Gokarneshwor and oxbow lakes in the floodplain provide habitat for avifauna listed in checklists compiled by the Bird Conservation Nepal and the King Mahendra Trust for Nature Conservation. Aquatic fauna include fish species documented by the Nepal Fisheries Research Division and macroinvertebrate assemblages used in bioassessment protocols developed in collaboration with the Asian Development Bank. Urban stretches have reduced biodiversity; however, restored green corridors near Godavari and conservation initiatives in Chandragiri aim to rehabilitate native plant communities and wildlife connectivity.
The river has long been integral to the cultural landscapes of Kathmandu Valley, featuring in inscriptions from the Licchavi dynasty period and in chronicles such as the Gopal Raj Vamshavali. Ghat complexes and cremation ghats adjacent to Pashupatinath Temple and the Kantipath corridor exemplify continued ritual usage. Historical travelogues by visitors like Francis Buchanan-Hamilton and colonial surveys by the Survey of India documented riverine settlements, while post-1950 urban plans by planners associated with the United Nations and development projects by the Asian Development Bank influenced riverfront modifications.
Multilevel governance arrangements involve agencies such as the Ministry of Water Resources and Irrigation (Nepal), the Kathmandu Valley Development Authority, and municipal bodies coordinating with international partners like the United Nations Development Programme (UNDP), the World Bank, and bilateral donors including Japan International Cooperation Agency and India. Initiatives include wastewater treatment pilot projects near Thapathali, riverbank stabilization projects supported by the International Centre for Integrated Mountain Development (ICIMOD), and public campaigns led by NGOs such as Clean Bagmati Campaign and Back to Live. Policy instruments include basin planning efforts under the National Water Plan and environmental regulations enforced by the Ministry of Forests and Environment (Nepal). Cross-border considerations engage institutions like the Indus Water Treaty-related technical communities and Indian state agencies in Bihar for downstream impacts. Ongoing restoration combines engineered solutions, community-based management in municipalities like Lalitpur Metropolitan City, and cultural conservation at heritage sites like Pashupatinath Temple to balance ecological rehabilitation with ritual practices.
Category:Rivers of Nepal Category:Rivers of Bihar