EESA07H3 Lecture Notes - Lecture 5: Data Quality, Water Cycle, Crop Yield
10 Dec 2015
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Document Summary
Flash floods: high intensity for short period of time. Rain on snow: increasing flow into streams. Flood types: urban floods from a network of sewers a, basement flooding, backup of storm/sanitation sewers, storm surges from seawater driven from high winds. Flood frequency, recurrence interval or likelihood of flood events: costal flood. Equation: t = 1/p = (n + 1)/m, m is rank of flood, so higher the rank the higher flow, n number of years of record, there are short periods of flow measurements relative to the flood. Flooding impacts and trends death and property damage damage slow increase in flooding events hurricane katrina. Flood management, avoid flood prone areas, no people or property in area, no damage or risk. Flood prevention: adding structures such as levees, concrete floodwalls, floodways, dams, creek channelization non structural approach, just by floodplain management. Problem with structures, adding levees will increase the flow velocity, and depth of the creek.
