What happens to rain after it reaches the ground? — Earth & Space Science

A rainstorm supplies one input to a landscape, but the water does not follow only one path. Some runs off, some enters pore spaces, some remains temporarily on surfaces and some later returns to air. A collected runoff cup is therefore one output sample rather than the whole water budget.

Rock properties help explain these paths. Minerals have characteristic composition and crystal arrangement; rocks contain textures and combinations that record formation processes. Weathering changes or breaks material, erosion transports it and deposition accumulates it. Loose sand becomes sandstone through grain-binding processes rather than simply cooling molten sand.

Groundwater usually occupies pores and fractures rather than a giant empty lake. Porosity describes available space, while permeability concerns connected transmission. Pumping can alter gradients and water levels without immediately exhausting a store. A negative monthly storage change must be combined with starting storage before interpreting what remains.

In the chapter investigation, compare runoff, infiltration and temporary storage under matched inputs. Measure sediment mass separately from water volume: less total sediment can coexist with greater concentration. Use mineral/texture evidence and a labeled budget to connect the material and water processes, and identify what a tray omits about an actual watershed.