climate change impacts: watersheds of mesoamerica and the … · 2013. 11. 20. · potential...
TRANSCRIPT
a work in progressa work in progress
Climate Change Impacts: watersheds of Mesoamerica and the watersheds of Mesoamerica and the
CaribbeanWater quality and availabilityWater quality and availability
Flood potentialFlood potentialFlood potentialFlood potential
ContextContext
• CATHALAC & SERVIRCATHALAC & SERVIR• Climate Change and Biodiversity
I f d d• Increasing frequency and intensity in disasters• Sediment and erosion modeling• Land cover change
• Deforestation: soil loss, lack of water retention• Urban and agricultural expansion: water needs up
CATHALACCATHALAC
— MissionMissionPromote integratedwatershed manage-ment in Latin Am-
Vision —A prosperous andsustainable envi-
erica and the Carib-bean, by means ofapplied investigation,
ronment in theLatin America and
Caribbean region
education, and technology transfer
CATHALACCATHALAC
• Integrated Watershed Resource ManagementIntegrated Watershed Resource Management• Climate Change
E l M d l d A l• Environmental Modeling and Analysis• Risk Management
Our International Education Programs are derived from these programsare derived from these programs
www.servir.net
the Regional Visualization & Monitoring System (SERVIR)Terra
AquaMesoamerica’s Earth Observation
& F ti Pl tfq & Forecasting Platform
LandSat MODIS
Fire
Red Tides
Land Cover / Use Change
Earth Observing SystemData and Operations System
LandSat MODISSRTM AMSR-EIKONOS ASTER
Land Cover / Use Change
Mesoamerican & CaribbeanGovernment agencies
Users
ImpactsTest-bed at
NASA MSFCWeb Interfacewww.servir.net
ThematicAreas
Government agenciesNGOs, ResearchersEducators, etc.
Impacts
Emergency ResponsePolicy ChangesCorridor PreservationSpecies PreservationSustained DevelopmentEnvironmentalEnvironmental
5
SERVIR is a SERVIR is a completely opencompletely open--SERVIR is a SERVIR is a completely opencompletely open--
AgricultureBiodiversityClimateEcosystemsEnergy
Areas Sustained DevelopmentImproved livelihoods Monitoring & Decision
Support ProductsMonitoring & Decision
Support Products
access system with access system with products in range of products in range of formatsformats
access system with access system with products in range of products in range of formatsformats
Operational Nodeat CATHALAC
Panama
gyDisastersHealthWaterWeather
Potential Impacts of Climate Change on Biodiversity in Central America, Mexico, and the Dominican Republic, CATHALAC 2008.Dominican Republic, CATHALAC 2008.
Data derived from: NatureServe InfoNatura Species Distribution Grids.WorldClim Climate Grids: Current and Future Conditions.IUCN World Commission on Protected Areas, 2007.
Data derived from: NatureServe InfoNatura Species Distribution Grids.WorldClim Climate Grids: Current and Future Conditions.IUCN World Commission on Protected Areas, 2007.
Trend analysisTrend analysis
• Climate change is expected to increase the Climate change is expected to increase the frequency and intensity of tropical systems
1908 1918 1928 1938 1948 1958 1968 1978 1988 1998 2007
Case study: Panama Canal Watershed (RUSLE)Case study: Panama Canal Watershed (RUSLE)
Local water qualityLocal water quality
• Sedimentation Sedimentation to Runoff ratio
Identification of – Identification of critical areas
Water availabilityWater availability
• Current demandCurrent demand• Future demand
L d h • Land use change scenarios:– Control– Urban & agricultural growth scenario
• Present changing demands in the context of g gchanging precipitation trends
Input dataInput data
• ElevationElevation• Precipitation
L d • Land cover• Soil
Data - terrainData - terrain
• GTOPO DEM 1kmGTOPO DEM, 1km• Synthetic rivers and watersheds: D-8 method
(Fairfield and Laymarie 1991)(Fairfield and Laymarie 1991)– Why synthetic?
R i l d d l h b d • Regional data do not always show transboundary watersheds very well… and they’re the important ones!
• Support hydrological modelingpp y g g
– Validate with national datasets
Data - climateData - climate
• Worldclim baseline (1950s-1990s): 1km interpolated ( ) pprecipitation (Hijmans et al. 2005)
• 18 Worldclim climate change scenarios
2020s
20 0A2
HadCM3
CGCM3T47 2050s
2080sB2
x xCGCM3T47
CSIRO Mk3
• SERVIR RCM (Hernandez et al. 2006)– Jan, Feb, June, July, August, September
Hadley Centre Coupled Model, version 3Canadian Centre for Climate Modelling and Analysis, Coupled Global Climate ModelCommonwealth Scientific and Industrial Research Organization coupled model, Australia
Data - land cover and soilData - land cover and soil
• GlobCover reclassified to C-CAPGlobCover, reclassified to C-CAP– Cover factor
S il FAO• Soils, FAO– Erodibility (k factor) – USGS hydrological group
ToolsTools
• Spatial AnalystSpatial Analyst– Hydrology tools
Surface tools– Surface tools– Others (e.g., map algebra, raster calculator)
• N-SPECT: Nonpoint Source Pollution and Erosion Comparison Tool (NOAA)
Preliminary results, per watershedPreliminary results, per watershed
• 12 baseline months + annual accumulation12 baseline months + annual accumulation• (12 projected months + annual accum.) x 18
scenarios = 234scenarios = 234• Anomaly per watershed, for the above
• Zonal Statistics• Map Algebra
Monthly accumulated precipitation per watershed: baseline Monthly accumulated precipitation per watershed: baseline
Light Heavy
Monthly accumulated precipitation per watershed: HadCM3 A2 2020sMonthly accumulated precipitation per watershed: HadCM3 A2 2020s
Light Heavy
Monthly anomaly per watershed:[HadCM3 A2 2020s] – baseline Monthly anomaly per watershed:[HadCM3 A2 2020s] – baseline [ ][ ]
Drier Wetter
Monthly anomaly per watershed:scenario – baseline Monthly anomaly per watershed:scenario – baseline
• For each month consider:For each month, consider:– HadCM3, CGCM3T47, CSIRO Mk3
A2 & B2 scenarios– A2 & B2 scenarios– 2020s, 2050s, 2080s
18 x 12 = 216 monthly precipitation anomaly per watershed gridsper watershed grids
Relative Precipitation ChangeRelative Precipitation Change
Monthly anomalies: a snapshot of capital cities in the regionMonthly anomalies: a snapshot of capital cities in the regiongg
Regional water qualityRegional water quality
• Utilize N-SPECT to derive runoff and Utilize N-SPECT to derive runoff and sedimentation estimates under baseline conditions and climate change scenariosconditions and climate change scenarios
C h f d ff • Compare the ratio of sedimentation to runoff to discover rivers that are projected to
d h l experience more sedimentation than normal, given the change in precipitation patterns
Regional water availabilityRegional water availability
• TEST: Add into the mix land cover change TEST: Add into the mix land cover change scenarios, based on population growth and agricultural expansion trendsagricultural expansion trends
• CONTROL: Leaving land cover the same
• We are already familiar with land cover change cases– El Valle de Anton, Panamá
Land use change and erosion Land use change and erosion
Bosque intervenido
Rastrojo
Uso agro. de subsist.
Uso agropecuario2001 2008
Uso agropecuario
La Indiana Dormida,
Intensification of Agriculture
La Indiana Dormida,
Intensification of AgricultureIntensification of AgricultureIntensification of Agriculture
Land use change and erosion Land use change and erosion
20082001
Cerro El Gaital
Bosque maduro
Bosque intervenido
R t jRastrojo
Uso agro. de subsist.
Uso agropecuario
Soil and Forest Conservation Soil and Forest Conservation g p
Land Cover ScenariosLand Cover Scenarios
80%
90%
100%
50%
60%
70%
80%WaterBareWetlandScrub
20%
30%
40%
50%ForestGrasslandAgUrban
0%
10%
20%
T T Y T
CURRENTS1_MRKT
S2_POLICYS4_SUST
Borrowed fromBorrowed fromBorrowed fromBorrowed fromLauretta BurkeLauretta Burke
World Resources InstituteAugust, 2006
Expected results: regional water availabilityExpected results: regional water availability
• Observed trend of drier rainy season in many Observed trend of drier rainy season in many parts of the region
Further stresses on water resources– Further stresses on water resources
A f i t t T b d t h d• Areas of interest: Transboundary watersheds– Where the rain falls doesn’t exactly show us the
i t d impacted areas– Downstream analyses sometimes cross borders
Flood potentialFlood potential
• Runoff before and afterRunoff before and after• Hurricane or storm scenarios (MUSLE)
• Related to regional flood risk map– Low elevation coastal zonesLow elevation coastal zones– National flood risk maps
• Highlight currently flood prone areas that are Highlight currently flood prone areas that are expected to undergo change
• Highlight new prone areas that weren’t beforeg g p
Flood riskFlood risk
• Utilizing the event-based feature in N-SPECT Utilizing the event-based feature in N-SPECT, a normal week can be compared to a very rainy weekrainy week
• Application of similar downstream analyses
ContactContact
• For more complete results please visit For more complete results, please visit http://www.servir.net or contact servir@cathalac [email protected]