EVSC 2800 Lecture 10: Fluvial Processes and Drainage Networks and Floods
18 Feb 2016
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Document Summary
Lecture topic: fluvial processes and drainage networks and floods. Figures 17. 1, 17. 2 (or some image of the water cycle), 17. 5**, 17. 7; 18. 1, 18. 3, 18. 5, 18. 6, 18. 8, 18. 9, 18. 10, 18. 15, 18. 20 (upland part only; we did not cover deltas), Key terms hydrologic cycle; antecedent stream, base level, bed load, braided stream, channel, dendritic drainage, discharge, divide, drainage basin, drainage network, floodplain, longitudinal profile, meander, oxbow lake, point bar, superposed stream, suspended load, tributary. The distribution of water on earth shows the most water is not fresh, liquid water. The most accessible sources of fresh water available for human consumption are rivers and lakes. The largest volume of fresh water available for human consumption is groundwater. The water cycle: in the hydrologic cycle, a portion of precipitation: (1) infiltrates into the subsurface, (2) evaporates to atmosphere, and (3) enters a surface-water drainage system. Water laden winds from warm oceanic regions rise and cool over nearby continents resulting in precipitation.
