EARTHSC 2GG3 Lecture 6: Podcast 6 | Rivers and Flooding
1 Oct 2016
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/sec: v = average velocity (m/sec, a = cross-sectional area = width x depth (m. 2: the cross-sectional area of a simple stream channel can be approximated by dividing it into a rectangular grid, with individual velocity measurements for each such box, the total flow would be the sum of. V1 x a1 + v2 x a2 + . , where a1 and v2 are the areas of individual boxes. 1997: and there are 87 years of records, then n = 87, then recurrence interval for 1997 flood is, t. 2006 debris flow, tucson, arizona: jokulhlaups occur at the toe of a glacier when meltwater feeds a stream with occasional, sudden, catastrophic floods. Glacial outburst floods: jokulhlaups: glacial-outburst floods from collapse of glacial ice dam or glacial tunnel also occur, ponding of meltwater under glacier can occur, during last ice age, there were huge glacial meltwater floods from continental ice sheets.
