Satellite precipitation estimates and the CAFFG system
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Transcript of Satellite precipitation estimates and the CAFFG system
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Satellite precipitation estimates and the CAFFG
systemBy
Rosario Alfaro
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CAMI (Central American Mitch Initiative)
• No radar over the region and few gauges in real time
• GOES Satellite Data and the RAMSDIS system (Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica and Panama)
• Precipitation estimates from the Hydro-Estimator (running in a server in Costa Rica)
• CAFFG (Central American Flash Flood Guidance) system
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CAFFG (Central American Flash Flood
Guidance) system• Developed by the Hydrological Research Center in
San Diego whose Director is Dr. Kosta Georgakakos• It works automatically. Produce Different products
at different times• The input data in real time: satellite precipitation
estimates and temperature.• It also use historical data of precipitation, humidity,
evapotranspiration and temperature• Main computational components of the system: the
soil moisture model and the FFG model
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CAFFG (continues)
• Consist of the processing and the dissemination servers both located in the National Meteorological Institute of Costa Rica.
• The products are available approximately 30 minutes after each hour.
• The dissemination server has the web page where the products are.
• The interpretation of the products needs training.• The validation is an on going process at this time
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The web page (https://cds.imn.ac.cr)
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Flash Flood Guidance:actual rainfall of given duration that is just enough tocause bankfull flows in small streamsIt is calculated at 00, 06, 12 and 18 UTC for 1, 3 and 6 hrsIt is not calculated for basins whose area is greater than 2000 km2
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Other products: ArcView tables
• Basin ID• 01MAP2004102602• 03MAP2004102600• 06MAP2004102600• 24MAP2004102600• 06ASM2004102600• 01FFG2004102600• 03FFG2004102600• 06FFG2004102600
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Errors
• Precipitation
• Soil
• FFG
• Forecast
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Final result
Warnings for flooding in small basins of the Central American
region
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Clasificación de cuencasNo hay datoInundación o inundación inminentePosible inundaciónNo hay riesgo de inundación
100 0 100 200 Kilometers
N
EW
S
Evaluación del riesgo de inundación correspondiente al 17-09-04 a las 18 Z válido a las 00 Z del 18-09-04
flooding
Case in Panama
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Cr_basin_delineation_dd.shpInundacion o inundacion inminentePosible inundacionNo hay riesgo de inundacion
#
No datos
100 0 100 200 Kilometers
N
EW
S
Evaluación del riesgo de inundación correspondiente al 06/10/04 a las 00Z
Case in Costa Rica
flooding
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Clasificación de cuencasInundación o inundación inminentePosible inundaciónNo existe riesgo de inundación
No datos
70 0 70 140 Kilometers
N
EW
S
Evaluación del riesgo de inundación para el 29-09-04 válido a la 01 Z
Rangos Kosta
Case in El salvador
flooding
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