Uttarakhand's first Ramsar site, a manmade wetland at the confluence of the Yamuna and Asan rivers.
Asan Conservation Reserve
The Asan Conservation Reserve is a wetland of national and international significance in northern India, situated where the Asan River meets the Eastern Yamuna Canal at the Uttarakhand-Himachal Pradesh border in the Doon Valley of Dehradun district. Created in 1967 by the construction of the Asan Barrage, the reservoir, also known as Dhalipur Lake, forms a calm, year-round water body that has matured into one of North India's most important bird habitats. In 2020 it became Uttarakhand's first designated Ramsar site, formally recognizing its value as a wetland of international importance under the Ramsar Convention.
Beyond its ecological role, the site combines engineering, hydrology, and biodiversity in a single compact landscape. The barrage feeds water to the Kulhal and Khara hydroelectric power stations along the Eastern Yamuna Canal and shapes the seasonal character of the wetland. The reserve attracts a substantial mix of resident and migratory birdlife, including threatened species tracked by the IUCN Red List, making it a focal point for birdwatchers, conservation researchers, and naturalists visiting the Doon Valley.
The conservation reserve reflects a wider shift in how India values engineered and manmade wetlands. Where the barrage was once appreciated mainly as a hydropower and irrigation structure, the resulting reservoir is now recognized as a biodiversity refuge and a protected natural area in its own right, drawing visitors throughout the cool and migratory seasons.