satellite mapping for irrigation management · 2009-06-18 · daily etc estimated by reset2 vs ndvi...
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![Page 1: Satellite Mapping for Irrigation Management · 2009-06-18 · Daily ETc estimated by RESET2 vs NDVI (2006) y = 1.0165x + 0.136 R2 = 0.9099 y = 1.1095x - 0.1896 R2 = 0.7936 0 2 4 6](https://reader034.vdocuments.net/reader034/viewer/2022050221/5f66bf7b5469c821a93e8a50/html5/thumbnails/1.jpg)
Satellite Mapping for Irrigation Management
![Page 2: Satellite Mapping for Irrigation Management · 2009-06-18 · Daily ETc estimated by RESET2 vs NDVI (2006) y = 1.0165x + 0.136 R2 = 0.9099 y = 1.1095x - 0.1896 R2 = 0.7936 0 2 4 6](https://reader034.vdocuments.net/reader034/viewer/2022050221/5f66bf7b5469c821a93e8a50/html5/thumbnails/2.jpg)
…develop and demonstrate a prototype decision support system that can efficiently deliver crop coefficient and estimated crop water use information to agricultural producers and water suppliers…
![Page 3: Satellite Mapping for Irrigation Management · 2009-06-18 · Daily ETc estimated by RESET2 vs NDVI (2006) y = 1.0165x + 0.136 R2 = 0.9099 y = 1.1095x - 0.1896 R2 = 0.7936 0 2 4 6](https://reader034.vdocuments.net/reader034/viewer/2022050221/5f66bf7b5469c821a93e8a50/html5/thumbnails/3.jpg)
NDVI from satellite
ETo from ground weather station(s)
crop coefficient Kc
ETc = ETo * Kc
canopy cover
"Reflectance-based" crop coefficients
![Page 4: Satellite Mapping for Irrigation Management · 2009-06-18 · Daily ETc estimated by RESET2 vs NDVI (2006) y = 1.0165x + 0.136 R2 = 0.9099 y = 1.1095x - 0.1896 R2 = 0.7936 0 2 4 6](https://reader034.vdocuments.net/reader034/viewer/2022050221/5f66bf7b5469c821a93e8a50/html5/thumbnails/4.jpg)
![Page 5: Satellite Mapping for Irrigation Management · 2009-06-18 · Daily ETc estimated by RESET2 vs NDVI (2006) y = 1.0165x + 0.136 R2 = 0.9099 y = 1.1095x - 0.1896 R2 = 0.7936 0 2 4 6](https://reader034.vdocuments.net/reader034/viewer/2022050221/5f66bf7b5469c821a93e8a50/html5/thumbnails/5.jpg)
Study area
![Page 6: Satellite Mapping for Irrigation Management · 2009-06-18 · Daily ETc estimated by RESET2 vs NDVI (2006) y = 1.0165x + 0.136 R2 = 0.9099 y = 1.1095x - 0.1896 R2 = 0.7936 0 2 4 6](https://reader034.vdocuments.net/reader034/viewer/2022050221/5f66bf7b5469c821a93e8a50/html5/thumbnails/6.jpg)
ETo
Crop cover
Weighing lysimeter
![Page 7: Satellite Mapping for Irrigation Management · 2009-06-18 · Daily ETc estimated by RESET2 vs NDVI (2006) y = 1.0165x + 0.136 R2 = 0.9099 y = 1.1095x - 0.1896 R2 = 0.7936 0 2 4 6](https://reader034.vdocuments.net/reader034/viewer/2022050221/5f66bf7b5469c821a93e8a50/html5/thumbnails/7.jpg)
y = 1.45x - 0.13R2 = 0.92
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0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9NDVI
4/54/225/75/236/86/247/107/268/279/129/2810/14
y = 1.45x - 0.13R2 = 0.92
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0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9NDVI
OtherBellpepperBroccoliCottonGrapeLettuceMelonsafflowerTomatoesWatermelonOnion
2008 results
![Page 8: Satellite Mapping for Irrigation Management · 2009-06-18 · Daily ETc estimated by RESET2 vs NDVI (2006) y = 1.0165x + 0.136 R2 = 0.9099 y = 1.1095x - 0.1896 R2 = 0.7936 0 2 4 6](https://reader034.vdocuments.net/reader034/viewer/2022050221/5f66bf7b5469c821a93e8a50/html5/thumbnails/8.jpg)
<22-33-44-5>5
ET (mm)
Apr 4
Jun 7
Aug 26
Oct 13
ET maps
![Page 9: Satellite Mapping for Irrigation Management · 2009-06-18 · Daily ETc estimated by RESET2 vs NDVI (2006) y = 1.0165x + 0.136 R2 = 0.9099 y = 1.1095x - 0.1896 R2 = 0.7936 0 2 4 6](https://reader034.vdocuments.net/reader034/viewer/2022050221/5f66bf7b5469c821a93e8a50/html5/thumbnails/9.jpg)
ETo, ETc for Study Area
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0 50 100 150 200 250 300 350DOY
ETc mean, std devETo
Spatially aggregated
![Page 10: Satellite Mapping for Irrigation Management · 2009-06-18 · Daily ETc estimated by RESET2 vs NDVI (2006) y = 1.0165x + 0.136 R2 = 0.9099 y = 1.1095x - 0.1896 R2 = 0.7936 0 2 4 6](https://reader034.vdocuments.net/reader034/viewer/2022050221/5f66bf7b5469c821a93e8a50/html5/thumbnails/10.jpg)
Daily ETc estimated by RESET2 vs NDVI (2006)
y = 1.0165x + 0.136R2 = 0.9099
y = 1.1095x - 0.1896R2 = 0.7936
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0 1 2 3 4 5 6 7 8RESET2 ETc (mm/d)
from NDVIfrom CCLinear (from CC)
Comparison with energy-balance approach
![Page 11: Satellite Mapping for Irrigation Management · 2009-06-18 · Daily ETc estimated by RESET2 vs NDVI (2006) y = 1.0165x + 0.136 R2 = 0.9099 y = 1.1095x - 0.1896 R2 = 0.7936 0 2 4 6](https://reader034.vdocuments.net/reader034/viewer/2022050221/5f66bf7b5469c821a93e8a50/html5/thumbnails/11.jpg)
Further research
• Modeling soil evap & stomatal regulation• Temporal interpolation• Nuts-n-bolts remote sensing issues (sun/view
angle, soil background)• Lysimeter• Validation• Optimal approach?• Decision tool development