GRS IR 701 Lecture Notes - Lecture 12: Landform
9 Nov 2017
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Floodplains are flat surfaces adjacent to rivers formed (cid:271)y erosio(cid:374) duri(cid:374)g floods (cid:894)false(cid:895) they"re created by deposition. The shallow part of a stream occurs on the outside of a turn (false) The role of erosion is greater than that of deposition at high ele(cid:448)atio(cid:374)s of a strea(cid:373)"s longitudinal profile (true) Erosion by a stream occurs mostly on the outside of a turn (true) A ri(cid:448)er"s (cid:449)idth, depth, (cid:448)elo(cid:272)ity, a(cid:374)d dis(cid:272)harge all i(cid:374)(cid:272)rease do(cid:449)(cid:374)strea(cid:373) (cid:894)true(cid:895) The average annual probability of a 50 year flood at a given location is 2% (true) Floods are a disaster for plants and wildlife (false) A meander cut off from the main course of a river is an oxbow. The land area that contributes water to a particular stream is the water shed. The sandy high berm or ridge on the edge of river, often marked by a row trees is termed a natural levee.
