When examining global river basin discharge rankings, the Indus River system—which sustains the agricultural economy of Punjab—ranks among the major river basins of the world. In terms of hydrologic regime, how is the Indus primarily classified?

💡 Solution & Explanation

The Indus River system is predominantly fed by melting snow and glaciers from the high Karakoram, Hindu Kush, and Himalayan ranges, supplemented significantly by summer monsoon rainfall in its middle and lower catchments. It is not an exclusively groundwater-fed system, although groundwater extraction is extensive in the plains. It is far from an ephemeral wadi since it maintains perennial flow throughout the year driven by glacial melt. The basin is located in temperate and subtropical latitudes rather than the equatorial zone. Analyzing hydrologic regimes is essential for managing transboundary water treaties and flood control structures.