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Quantifying Spatial Change in Vegetation Cover in the Colorado River Delta, 1992-1999: Its relationship with water flows and implications for future water and habitat management. General objective: To determine the impacts and management implications of water river flows - PowerPoint PPT Presentation
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Quantifying Spatial Change in Vegetation Cover in the Colorado River Delta, 1992-1999:
Its relationship with water flows and implications for future water and habitat management.
General objective:
To determine the impacts and management implications of water river flows and human uses in the vegetation pattern distribution of the Colorado River Delta.
Specific objectives:
•To determine change in per cent vegetation cover, quantifying contributing factors (water river flows and land and water uses).
•To determine spatial vegetation patterns and their implications for wildlife, including estimation of water needs to maintain current or necessary (proposed restoration) habitats.
•To develop a model to estimate vegetation patterns distribution in the Colorado River Delta based on proposed or expected natural and human induced conditions....POST DOC!!
% Veg. Cover Map
Change Analysis
1992-1999
Remote Sensingand Field Work
INPUTS: water flows, land use, ground water,
salinity, other
Simulation Model
ManagementImplications and
Recommendations
Analysis of % Vegetation Cover
Based on Thematic Mapper (TM) Images:
1992 (May)1993 (June)1994 (July)1996 (June)1997 (February and July)1998 (June)1999 (May)
Methods:
Using Scaled NDVI method by Carlson and Ripley (1997) andthe equation:
% Veg. Cover = 74 NDVIscaled + 18.2
from Dycam and TM NDVI validation.
1996
Previous 2 years were relatively dry
(less than 500 million cubic meters).
Change in % Vegetation Cover, 1996 and 1999
-20000
-10000
0
10000
20000
30000
40000
50000
60000
Bare soil 20-40% 40-50% 50-60% 60-80% 80-100% greater100%
Vegetation Cover class
Are
a (i
n H
ecta
res)
1996
1999
Change
1999Previous 2 years with relatively
large water flows(3500 million cubic meters)
Impact of water flows
Flooded area due to water flows
June 199315,000 Million
cubic meters
February 1997100 cubic meters/sec
in same month
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Depth to groundwater, 1993
Tin_well1993Breaklines
HardSoft
Elevation Range-43 - -40.95-40.95 - -38.9-38.9 - -36.85-36.85 - -34.8-34.8 - -32.75-32.75 - -30.7-30.7 - -28.65-28.65 - -26.6-26.6 - -24.55-24.55 - -22.5-22.5 - -20.45-20.45 - -18.4-18.4 - -16.35-16.35 - -14.3-14.3 - -12.25-12.25 - -10.2-10.2 - -8.15-8.15 - -6.1-6.1 - -4.05-4.05 - -2
# Well_prof_93.shpBordo1.shp
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Tin_well1993Breaklines
HardSoft
Elevation Range-43 - -41.975-41.975 - -40.95-40.95 - -39.925-39.925 - -38.9-38.9 - -37.875-37.875 - -36.85-36.85 - -35.825-35.825 - -34.8-34.8 - -33.775-33.775 - -32.75-32.75 - -31.725-31.725 - -30.7-30.7 - -29.675-29.675 - -28.65-28.65 - -27.625-27.625 - -26.6-26.6 - -25.575-25.575 - -24.55-24.55 - -23.525-23.525 - -22.5-22.5 - -21.475-21.475 - -20.45-20.45 - -19.425-19.425 - -18.4-18.4 - -17.375-17.375 - -16.35-16.35 - -15.325-15.325 - -14.3-14.3 - -13.275-13.275 - -12.25-12.25 - -11.225-11.225 - -10.2-10.2 - -9.175-9.175 - -8.15-8.15 - -7.125-7.125 - -6.1-6.1 - -5.075-5.075 - -4.05-4.05 - -3.025-3.025 - -2
# Well_prof_93.shpBordo1.shp
Depth to ground water, 1993