Sources of River Water: From Rain to Groundwater

Primary Sources

1. Precipitation: Rain and snowmelt runoff—volume depends on intensity, duration, slope, soil, and vegetation.
2. Groundwater: Aquifer discharge where water table intersects the surface (springs, seepage).
3. Glaciers and snowfields: Seasonal melt feeds alpine rivers, crucial in summer.
4. Springs: Natural groundwater outlets, especially in karst terrain.
5. Other water bodies: Lake, reservoir, or marsh overflow.

Rivers integrate these inputs, sustaining flow through varied seasons and climates.