Geography 1100 Lecture Notes - Lecture 13: Littoral Zone, 100-Year Flood, Soil Type
21 Jan 2016
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Valley side steepness -> higher peak because water moves more rapidly into the river systems; gentle slope water takes longer to get into the river. Vegetation -> no vegetation = more water into river, higher peak, more discharge. Soil type ->most of the water flows off, means more water into river system, lag time is short. If permeable surface, peak is smaller and lag time is longer. > over time erosion and deposition occurs at the same time = equilibrium. > fields allow greater variation, so stream may erode thus causing more deposition. > in suburban areas surface is removed during construction, bare ground therefore large amounts of soil are put into the river, increasing water level. > in urbanized ares everything is waterproof, so flash floods can occur, river level varies enormously. Large rainfall = flash floods ; no rainfall = river almost disappears.
