GEOLOGY

Detailed explanation-1: -A stream is a body of water that carries rock particles and dissolved ions and flows down slope along a clearly defined path, called a channel.

Detailed explanation-2: -A stream channel is the path for water and sediment flowing within the stream banks (Figure 1). A stream channel constantly adjusts to changes in streamflow, sediment load, stream slope and vegeta-tion.

Detailed explanation-3: -The flow of a stream is controlled by three inputs – surface runoff (from precipitation or meltwater), daylighted subterranean water, and surfaced groundwater (spring water). The surface and subterranean water are highly variable between periods of rainfall.

Detailed explanation-4: -Formation of Stream Channels A stream channel can form as the result of surface or subsurface processes, or some combination of the two. Heterogeneities in the surface and subsurface properties of hillslopes create zones of preferential flow during downslope movement of water.