Editing Snowmelt runoff contribution (section)

== Geographic / System Context ==
Snowmelt runoff contribution occurs across diverse geographic settings where seasonal snowpacks and glaciers exist. These include mountainous regions such as the Rocky Mountains, the Himalayas, the Alps, and polar and subpolar zones with significant glaciation. The spatial extent of snow and glacier melt influence varies widely, from small alpine catchments to large river basins draining extensive cryospheric areas.

The phenomenon is not confined to a single geographic scope but is relevant to any hydrologic system where snow and glacier meltwater contribute to river discharge. This includes temperate, boreal, and polar climates. Variability in snowmelt runoff is influenced by local topography, elevation, and regional climate patterns, which modulate snow accumulation and melt rates.