GEOG106 Lecture Notes - Lecture 8: Strahler Number, Regolith, Silt
11 Apr 2017
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Document Summary
External land-shaping agents that work by erosion and deposition- include running water, subsurface water, wind, moving ice, and coastal waters. Our focus first is on running water moving over the land, given the term fluvial processes. Basic landscape- sculpting effect of running water is to smooth irregularities. Overland flow- un-channeled downslope movement of water. Valleys and interfluves: valley-portion of terrain in which a drainage system is established, interfluve- higher land above valley walls that separates adjacent valleys. Drainage basins- also referred to as watershed for larger geographic scale of things. Complete system of trunk river and its tributaries forms a network that occupies a region. All the area that contributes overland flow, streamflow and groundwater to that stream. Line of separation between runoff of one drainage basin and runoff that goes towards an adjacent basin. Adjacent basins are separated from each other by topographic rises.
