Rupa Lake

Rupa Lake (Nepali: Rupa Tal) is a freshwater lake on the eastern side of the Pokhara Valley in Kaski District, Gandaki Province, Nepal. It lies on the border between Pokhara Metropolitan City and Rupa Rural Municipality, at an elevation of roughly 600 metres (about 1,969 ft) and centred near 28°8′55″N 84°6′40″E. Elongated on a north–south axis and tucked among forested ridges, it is the third-largest of the Pokhara Valley lakes, after Phewa and Begnas, and sits in the lower foothills of the Lesser Himalaya rather than at high altitude.

The lake is comparatively shallow, with an average depth of only a few metres and a maximum depth of around 6 m (about 20 ft). It is a tectonically and fluvially shaped valley lake fed by perennial streams — principally the Talbesi stream, with additional inflow from the Dovan (Dhovan) and Khurlung kholas — and it drains southward through the Tal Khola outlet at Sistani Ghat. Its catchment, or watershed, covers roughly 30 km² of farmland and forest.

Rupa Lake has shrunk over the past half-century. Sources record a surface area on the order of 115–135 hectares (about 1.15–1.35 km²) in recent decades, smaller than earlier estimates. The reduction is attributed chiefly to heavy sediment loads carried in by its feeder streams, a process accelerated by upstream land use, road building and agriculture. Precise figures vary between surveys and years, reflecting both genuine change and differences in how the open water versus the marshy lake margins are measured.

Rupa Lake is one of Nepal's biologically rich lowland wetlands and a recognised stopover and habitat for waterbirds. Around 36 species of resident and migratory waterbirds have been recorded at the lake. The mosaic of open water, lotus beds, reed margins and surrounding forest supports this avian diversity, and the wetland is also habitat for otters and a range of amphibians.

The lake and its basin are notably plant- and fish-rich. Community surveys have documented numerous wetland plant species, including white lotus and wild rice, and a fish fauna comprising more than twenty indigenous species alongside introduced varieties used in aquaculture. The lake supports productive fisheries through cage and pen culture, with carp among the principal farmed fish, integrating food production with the surrounding ecosystem.

Biodiversity management is unusually deliberate here. Local conservation efforts have set aside dedicated conservation blocks for white lotus, wild rice, waterbirds, otters and native fish, and have included a women-led orchid conservation effort. These in-situ measures, combined with shoreline restoration, make Rupa one of the better-documented community-conserved wetlands in the Nepalese mid-hills.

Rupa Lake is internationally known as a model of community-based wetland governance. The Rupa Lake Restoration and Fishery Cooperative (RLRFC), established in 2001, grew from a few dozen founding households to several hundred members within a decade, and operates under the umbrella of the locally formed Biodiversity Resource Conservation Movement. The cooperative links lake conservation directly to local livelihoods through fisheries, agriculture, beekeeping, goat-rearing and value-added products such as lotus seeds.

A defining feature is its payment for ecosystem services (PES) arrangement, under which a share of net fishery income is reinvested in conservation and in supporting poorer and upstream households. This explicitly rewards upstream communities for soil-conserving, environmentally friendly farming and forestry, on the recognition that the downstream lake cannot be protected without addressing erosion and land use in its catchment.

The model has attracted support from organisations including LI-BIRD (Local Initiatives for Biodiversity, Research and Development) and the UNDP/GEF Small Grants Programme, and has been showcased through international initiatives such as the Satoyama Initiative. It is frequently cited as a working example of integrating ecotourism, fisheries, biodiversity conservation and equitable benefit-sharing in a Himalayan lake basin.

On 2 February 2016 (World Wetlands Day), Rupa Lake was included in the Lake Cluster of Pokhara Valley, which became Nepal's tenth Wetland of International Importance under the Ramsar Convention (Ramsar Site No. 2257). The cluster groups nine of the valley's lakes — among them Phewa, Begnas and Rupa — together with their surrounding catchment, covering an area cited at about 261 km². The designation recognises the cluster's value for biodiversity, water security and migratory birds.

Despite its protections, Rupa Lake faces persistent threats. Siltation remains the foremost concern: high sediment inputs from its feeder streams have driven the long-term loss of open-water area and continue to shrink and shallow the lake. Invasive vegetation — particularly elephant grass (Pennisetum purpureum) along the shoreline, together with floating weeds — advances year on year and requires repeated manual removal. Eutrophication risks arise from agricultural runoff and inadequate waste disposal in the basin.

Conservation responses combine community action with formal protection: afforestation and community forestry in the catchment, bioengineering and green-belt planting to curb erosion, lake-boundary demarcation, and ongoing weed clearance funded partly through the cooperative's own revenues. For visitors, Rupa offers a quieter alternative to the busier Phewa and Begnas lakes, with birdwatching, boating and the surrounding hills as the main draws; responsible visitation that respects the conservation blocks and supports local cooperatives aligns with the lake's community-led ethos.