In mountainous and polar regions what features serve as reservoirs to temporarily store the water?

In mountainous and polar regions, features such as glaciers, snowpack, and permafrost serve as reservoirs to temporarily store water. Glaciers accumulate precipitation in the form of snow, which melts gradually during warmer seasons, releasing water into rivers and streams. Snowpack, a layer of snow that builds up over the winter, also melts in spring, contributing to water flow. Permafrost can hold moisture in the form of frozen ground, influencing hydrology in these regions.