Water features play a vital aesthetic and ecological role in Chandigarh's landscape.
* **Sukhna Lake:** A massive rain-fed reservoir created in 1958 by damming the Sukhna Choe (seasonal stream). It acts as the primary waterfront for the city and a sanctuary for migratory birds like Siberian ducks and storks. * **Seasonal Streams:** The city is bounded by the Patiala ki Rao on the west and the Sukhna Choe on the east, both of which are seasonal streams originating in the Shivalik Hills. * **The Ghaggar River:** Flows just south of the Tricity area, influencing the regional water table and local agriculture.