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How does the Kotri Barrage provide water to Karachi?

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Physical map showing the Indus River basin and its drainage network across parts of Pakistan, India, China, and Afghanistan. The map details river courses, tributaries, canals, dams, irrigated and marsh areas, sand regions, and elevation changes with shaded relief. International, disputed, and control boundaries are marked, and a small locator map in the corner shows the basin's position within South Asia. — Indus River The Indus River basin and its drainage network.

The Kotri Barrage—also known as the Ghulam Muhammad Barrage—provides water to Karachi primarily through the formation of Kalri Lake.1

The barrage project, located on the Indus River near Hyderabad, facilitates the diversion of water into this lake, which serves as a key source for the city's water supply. Additionally, the right-bank canal originating from the Kotri Barrage provides supplementary water to Karachi.123