14.15 - fluvial

14.15 - fluvial - Lectures 14 and 15: 2 and 16 March...

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Landform Geography: Fluvial Lectures 14 and 15: 2 and 16 March Lecture outline: 1. Introduction – fundamental concepts 2. Watersheds 3. Sediment movement 4. Stream channels 5. Drainage patterns Next: Spring Break Fluvial (part 2) - 16 March Exam 2 – 18 March People and the Environment The Bird’s- foot of the Mississippi (p. 505) Focus Niagara Falls (p. 495)
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http://visibleearth.nasa. MODIS- Terra
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World’s Longest Rivers
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World’s Largest Rivers – by
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Fundamental Concepts Fluvial = river Hydrology = science of water Fluvial erosion = streams transporting weathered sediment to a new location Deposition = sediments being laid to rest Alluvium = sediments deposited by running water (e.g., a river) http://visibleearth.nasa.gov/view_rec.php?
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This is how we are going to approach 1. Watersheds 4. Drainage Patterns 2. Sediment movement 3. Stream Channels
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Watersheds (or Drainage Basins) Def. (From J.W. Powell): “That area of land, a bounded hydrologic system, within which all living things are inextricably linked by their common water course…” ocean A ‘funnel’ that collects water Multiple scales FYI: EPA – 2100 in conterminous USA
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Watersheds: Broad and Saluda Rivers converge ˚ Congaree River Congaree River watershed 7 watersheds ~700 square miles 53% forested and 17% urban Congaree River joins Santee River Santee River watershed 11 watersheds ~1300 square miles http://www.scdhec.gov/environment/water/shed/congaree.htm Every stream has its own watershed Large rivers comprise multiple sub-watersheds (connectivity of river drainage patterns)
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Figure Watersheds: Multiple Scales Sub-watersheds and watershed of the Mississippi River
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Drainage Divides Watersheds and sub- watershed are separated by drainage divides Water (runoff) is
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14.15 - fluvial - Lectures 14 and 15: 2 and 16 March...

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