MRobinson

MRobinson - Lake Cachuma vegetation change in wet & dry...

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Michael Robinson ESM 266, Spring 2003 Lake Cachuma vegetation change in wet & dry years
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Methodolgy Produce “true color” base map of Lake Cachuma region. Produce “false color” images of dry, average and wet years. Transform images using NDVI/greenness index Perform change detection analysis » Compare between seasons (same year) » Compare between hydrologic conditions
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Initial Thoughts Data should be collected close to same days because of solar angle effects. Expect to see major differences between seasons and hydrologic conditions. Images closely following rainfall could bias results depending on hydrologic conditions. » Very dry = dramatic change » Very wet = little change
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Lake Cachuma Rainfall 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 Water Year (Oct-Sept) Rainfall (m) Average Rainfall = 0.48 m 5/10 & 8/30 4/29 & 9/4 4/8 & 9/15 4/30 & 8/20 4/30 &
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MRobinson - Lake Cachuma vegetation change in wet & dry...

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