EAS100 Lecture Notes - Lecture 14: Evapotranspiration, Regolith, Feldspar
14 Oct 2014
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The slow downslope movement of soil and regolith. Mass wastings also can occur via earthquake, etc. The physical removal of material by mobile agents such as water. Moving water - extremly effective agent of erosion. Region of land that contributes to a particular waterway. River systems: they erode the channels in which they flow, they transport sediments supplied by weathering and slope processes, they produce a wide variety of erosional depositional landforms. 2) channel charecteristics size: more volume, more sediment carying capacity. roughness: still / rapids shape: broad/narrow, semi-circular/flat/deep. Lateral meandering - tend to magnify over time. erosion outside curve / deposition inside. = channel width (m) * mean channel depth (m) * mean velocity (m/s) Sediment grains in suspension weather the channel much like sandpaper. 3 kinds of sediments: dissolved load, suspended load. Chemical weathering -- silicate weathering -- feldspar weathering. ?,000,000 kg/day (due to damming: bed load. Competence: maximize size of sediment a stream is capable of.
