Download - 2_Trotz_Impacts of CC on Water
-
7/31/2019 2_Trotz_Impacts of CC on Water
1/15
The Impact of Climate Change onWater Resources in the
Caribbean
1U Trotz - Trinidad&Tobago
Inter-American Development BankCapacity-Building Workshop:
Climate Change Adaptation andWater Resources
Trinidad and Tobago 22-23 March2011
Hyatt Hotel Port of Spain
-
7/31/2019 2_Trotz_Impacts of CC on Water
2/15
U Trotz - Trinidad&Tobago
Water- An Essential Commodity
Sustainable development in the Caribbeanrequires the provision of adequate andaffordable supplies of water to maintain:
Agriculture Health
Tourism
Ecosystem health
Domestic uses Industry
Energy (hydro)
2
-
7/31/2019 2_Trotz_Impacts of CC on Water
3/15
U Trotz - Trinidad&Tobago
Existing Impacts on Regional WaterSupply
Water supply already impacted on by:
Generic shortages
Population growth & urbanisation
Pollution waste disposal & agriculture
Increased sectoral demands tourism, agriculture.
Wasteful practices
Watershed degradation
Bad land use practices sedimentation
Management issues sectoral approaches toresource management
All these impacts will be further exacerbated byclimate change.
3
-
7/31/2019 2_Trotz_Impacts of CC on Water
4/15
U Trotz - Trinidad&Tobago
Global Climate Trends
Recently released Fourth Assessment Report of the
IPCC concludes:
Unequivocal evidence that the earths temperature is rising andattributable to anthropogenic activitiesGreen House Gases
Rise in global temperatures of between 2 -4.5 oC.
Sea level rise of between 11 -77 cm.
Changed weather patterns
More intense extremes drought ,floods
More intense hurricanes
4
-
7/31/2019 2_Trotz_Impacts of CC on Water
5/15
U Trotz - Trinidad&Tobago
FUTURE PROJECTED % CHANGES IN PRECIPITATION
5
-
7/31/2019 2_Trotz_Impacts of CC on Water
6/15
-
7/31/2019 2_Trotz_Impacts of CC on Water
7/15
-
7/31/2019 2_Trotz_Impacts of CC on Water
8/15
U Trotz - Trinidad&Tobago
Key Messages For The WaterSector
Paradoxically frequency of intense rains up by3% on average and this is projected to increase to20% by 2050.
More erosion and contaminants to coastal areas
How will this affect infiltration and recharge?
Sea level rise increased salt water intrusionaugmented by storm surges. But regional distributionof sea level rise not well predicted.
Strongest hurricanes more intense increasingdisaster losses
8
-
7/31/2019 2_Trotz_Impacts of CC on Water
9/15
U Trotz - Trinidad&Tobago
Consequences Of Climate Change.
Change in rainfall regimes
Increased evaporation with higher temperature
Increased evapo-transpiration (soil moisture)
>> SLR salt water intrusion (estuarine, aquifers)
Decreased precipitation
Increase in extreme events droughts, floods
Increased intensity of heavy rain events rapid run off /flash floods, >> soil erosion, >> run off of contaminants
>> intensity of hurricanes
Adverse effects on coastal waters
9
-
7/31/2019 2_Trotz_Impacts of CC on Water
10/15
U Trotz - Trinidad&Tobago
Coastal Vulnerability and RiskAssessment
Studies (CPACC) in Barbados, Guyana, Grenada forscenarios of 0,2m SLR by 2020, 0.5 SLR by 2050, and 1mSLR by 2100:
Barbados
St. Michael and St. Philip aquifers which produce 75% of islandwater safe from saline intrusion
West Coast aquifers already showing signs of salt water intrusion
Grenada
0.5 SLR will have severe hydrological impact in Carriacou
1.0 SLR will lead to salinisation of wells in South peninsula ofGrenada
10
-
7/31/2019 2_Trotz_Impacts of CC on Water
11/15
U Trotz - Trinidad&Tobago
Coastal Vulnerability and RiskAssessment
Guyana
In dry season estuarine penetration of brackish water formore than 60km. SLR will >> extent of penetration
Coastal aquifers already experiencing salt waterintrusion. Will >> with SLR
11
-
7/31/2019 2_Trotz_Impacts of CC on Water
12/15
Regional Studies
MACC project
vulnerability & Impact pilot studies
Jamaica aquifer salinisation
Belize -- Watershed
St Lucia - Watershed
CCCCC SPACC project
Implementation of adaptation measures
St LuciaVieux Fort watershed St. Vincent & the GrenadinesBequia
UNESCO aquifer pilot studyJamaica,T&T
U Trotz - Trinidad&Tobago 12
-
7/31/2019 2_Trotz_Impacts of CC on Water
13/15
U Trotz - Trinidad&Tobago
Climate Change Concerns in theSector
Need to Adapt
Increasing variability in the hydrological cycle
evident over last 30 years in many parts of world
Chances are that this will intensify with globalwarming
Extreme weather events becoming more commonand severe and bring mounting human sufferingand escalating economic losses
13
-
7/31/2019 2_Trotz_Impacts of CC on Water
14/15
U Trotz - Trinidad&Tobago
Climate Change Concerns in theSector
Risk to National Development. Lost crops, lost powergeneration, physical damage to transportation andinfrastructure can wipe out decades of development.MDGs for hunger and poverty at risk by threat of morefrequent climate extremes
Natural systems impacted on. Effects of climateextremes super-imposed on >> water demands for alluses means diminished availability of water to preserve
ecosystems
The poorest in developing countries most vulnerable
14
-
7/31/2019 2_Trotz_Impacts of CC on Water
15/15
THANK YOU
U Trotz-Trinidad &Tobago
For further information please contact us at:
THE CARIBBEAN COMMUNITYCLIMATE CHANGE CENTRE
2nd Floor, Lawrence Nicholas Bldg.P.O. Box 563Bliss Parade,Belmopan City, BelizeTel: +501-822-1094/1104Fax: +501-822-1365Website: www.caribbeanclimate.bz