Climate Change, Water and Security in the Mediterranean implications for science and policy (a perspective from the CLIMB project)

Transcription

1 Climate Change, Water and Security in the Mediterranean implications for science and policy (a perspective from the CLIMB project) 4th International Conference November 2013, Cádiz Ralf Ludwig & CLIMB partners A collaborative research project under the 7th Framework Programme Environment, 4th SCARCE incl. International Climate Change Conference, (ENV) 26 November 2013, Cádiz 1 1

2 Climate Change Impacts in the Mediterranean Source: European Environmental Agency, th SCARCE International Conference, 26 November 2013, Cádiz 2

3 Conclusion Measurements and projections indicate severe impacts on water resources management & key strategic sectors of regional economies a strong need for adaptation but is all this knowledge useful for the local stakeholder (water user, water manager)? modeling CC impacts on the local (catchment) scale! 4th SCARCE International Conference, 26 November 2013, Cádiz 3

4 Outline The CLIMB project Results from ( ( ( Environmental Monitoring) Climate Models Auditing) Impact Modeling Uncertainty Assessment Risk Analysis Stakeholders) Dissemination The CLIWASEC cluster A Summary for Policymakers 4th SCARCE International Conference, 26 November 2013, Cádiz 4

5 CLimate Induced Changes on the Hydrology of Mediterranean Basins Reducing Uncertainty and Quantifying Risk funded under EU s FP7 Environment Theme (Theme: Climate, Water & Security, ENV ) funding period 50 months (01/ /2014) 20 beneficiaries 9 countries: EU Austria, France, Germany, Italy SICA Egypt, Palest. Adm. Areas, Tunisia, Turkey Other Canada 4th SCARCE International Conference, 26 November 2013, Cádiz 55

6 CLIMB mission & objectives analyse future climate induced changes in hydrological budgets and extremes link the changes in hydrological quantities to vulnerability and associated risks quantify uncertainties in climate change impact analysis 4th SCARCE International Conference, 26 November 2013, Cádiz 6

7 CLIMB conceptual framework Study Site Characterization GCM / RCM 1 GCM / RCM 2 GCM / RCM n Conventional data (soil, DEM, vegetation, water availability and consumption etc.) Climate Model Audit & Uncertainty Assessment Socioeconomic Factor Assessment Remote Sensing Parameter retrieval & Data assimilation Geophysical Data Acquisition Hydrological Model 1 Hydrological Model 2 Hydrological Model n Hydrological Models Audit & Uncertainty Assessment Risk Model Vulnerability & Risk Assessment Dissemination & Stakeholder Interaction (Interviews, WebGIS, Website, CLIMBPortal) 4th SCARCE International Conference, 26 November 2013, Cádiz 7

8 CLIMB Structure & Workflow Socioeconomic Factor Assessment Hydrological Model 1 Hydrological Model 2 Hydrological Model n Hydrological Models Audit & Uncertainty Assessment Risk Model Vulnerability & Risk Assessment Dissemination & Stakeholder Interaction (Interviews, WebGIS, Website, Focus Groups etc.) 4th SCARCE International Conference, 26 November 2013, Cádiz 8

9 Hydrological modeling Some examples: Chiba P (mm) R (mm) Sept Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug 0 Sept Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug 4th SCARCE International Conference, 26 November 2013, Cádiz 9

10 Hydrological modeling Chiba: Flow duration curve High Flow Moist Conditions Mid- Range Conditions Dry Conditions Low Flow Discharge (m 3 /s) Flow Exceedence Percentile (Percentage of time that indicated discharge is equated or exceeded) 4th SCARCE International Conference, 26 November 2013, Cádiz 10

11 Hydrological modeling Rio Mannu: soil water content 4th SCARCE International Conference, 26 November 2013, Cádiz 11

12 Hydrological modeling Rio Mannu: Max number of consecutive low flow days 4th SCARCE International Conference, 26 November 2013, Cádiz 12

13 CLIMB Structure & Workflow Socioeconomic Factor Assessment Risk Model Vulnerability & Risk Assessment Dissemination & Stakeholder Interaction (Interviews, WebGIS, Website, Focus Groups etc.) 4th SCARCE International Conference, 26 November 2013, Cádiz 13

14 Uncertainty assessment Handling of Uncertainty in science is central to its support of sound policy making (Smith & Stern, 2011) 4th SCARCE International Conference, 26 November 2013, Cádiz 14

15 Uncertainty assessment - 1 FINDINGS AND IMPLICATION: Both sites: TAW (-15 to -33%), reduces significantly in FUT CUS rated low (Chiba) to medium (Rio Mannu) Negative trend confirmed High confidence on trend 4th SCARCE International Conference, 26 November 2013, Cádiz 15

16 Uncertainty assessment - 2 Certainty Map of key indicators (here TAW) Annual Monthly Decrease trend of long-term annual TAW Monthly-based degree of certainty, more diverse Hotspot areas can be clearly identified 4th SCARCE International Conference, 26 November 2013, Cádiz 16

17 Uncertainty assessment - 3 Spatial representation of Uncertainty (COV in %): Chiba COV[%] : / COV[%] : / COV[%] : / COV[%] : / Spatial UA: COV doubles in FUT Clay loam soils with highest COV 4th SCARCE International Conference, 26 November 2013, Cádiz 17

18 Integrating Uncertainty and Risk 4th SCARCE International Conference, 26 November 2013, Cádiz 18

19 Tourism Value at Risk Distribution of income generated by tourism in Sardinia (Jun.-Aug.) as a function of year-to-year weather variability VaR(0.9): MEUR % REF FUT FUT (+Trend) Income estimation: overnight stays * average expenditure per overnight stay 4th SCARCE International Conference, 26 November 2013, Cádiz 19

20 Tourism potential CC-impacts Expected change in overnight stays (in %) due to a change from reference ( ) to future ( ) climatic conditions Potential losses in summer BUT tendentially positive annual net impacts. 4th SCARCE International Conference, 26 November 2013, Cádiz 20

21 Tourism future water demand scenarios Change in future water demand ( ) of tourism (Nabeul) during spring for different growth and water use scenarios Current Target Maximum value Tunisian observed (formulated average in recent in 2002) years Effect of CC-independent overnight stay (os) growth and/or of change in average water consumption per os CC impact (multi-model-mean) 4th SCARCE International Conference, 26 November 2013, Cádiz 21

22 Agriculture - Tomatoes (same water usage as current) March plantings Yield 17% August planting Yield 17% Results are soil dependent Sandy clay loam strongly affected Sandy loams least affected 4th SCARCE International Conference, 26 November 2013, Cádiz 22

23 Agriculture - Tomatoes (10% less water usage as current) March plantings Yield 86% Crop failure 45% August planting Yield 17% Total harvest: 50% less yield 4th SCARCE International Conference, 26 November 2013, Cádiz 23

24 Agriculture Adaptation recommendations Agricultural risk can be minimised through adaptation For crops / management systems at risk Severity Mulching Alter planting dates to follow seasonal changes Switch crops / management systems to lower risk systems that require less irrigation Discontinue high risk irrigation of crops / management systems on specific soils Discontinue high risk irrigation of crops / management systems completely Use irrigation water saved on remaining crops or for other purposes (tourism) 4th SCARCE International Conference, 26 November 2013, Cádiz 24

25 CLIMBPortal the window to the inside/outside 4th SCARCE International Conference, 26 November 2013, Cádiz 25

26 CLIMBPortal 4th SCARCE International Conference, 26 November 2013, Cádiz 26

27 CLIMBPortal 4th SCARCE International Conference, 26 November 2013, Cádiz 27

28 CLIMBPortal conclusion The CLIMBPortal solved: the problem of heterogeneous data and file formats the missing of ISO-compliant metadata the lack of a uniform presentation of model results The CLIMBPortal offers: compliance to required geospatial standards (e.g. INSPIRE, OGC) maps and figures of easy-to-interpret hydrological indicators access to underlying data for registered users a WebGIS-client that integrates external Web Mapping Services an open source solution for longterm availability of CLIMB results 4th SCARCE International Conference, 26 November 2013, Cádiz 28

29 4th SCARCE International Conference, 26 November 2013, Cádiz 29

30 Developing the cluster Critical mass of 46 Partners 4th SCARCE International Conference, 26 November 2013, Cádiz 30

31 Objectives of the CLUSTER Scientific Synergy Study Sites are complementary in scope, region and scale share information and data Identify common stakeholder groups compare and integrate model results joint publications joint science-policy briefs 4th SCARCE International Conference, 26 November 2013, Cádiz 31

32 Summary for Policymakers 4th SCARCE International Conference, 26 November 2013, Cádiz 32

33 Summary for Policymakers WASSERMed - Research Highlights o o o o o o The warming trend and changes in precipitation patterns could affect the composition and functioning of natural and managed ecosystems. Growing non-agricultural water needs will strongly affect agricultural water shortages in the Southern Mediterranean; Water resources for environmental preservation, are likely to decrease, especially in the MENA region. Intra-Mediterranean virtual water trade is likely to decline, with virtual imports from central and northern Europe increasing. Improved water efficiency appears to significantly mitigate the economic impacts of water scarcity, especially in the Northern areas. A seasonal change in tourism is probable due to improving climate conditions in spring and autumn and a slight deterioration in summer. Crop water requirements are very likely to increase in all case studies, requiring specifically adapted management practices. 4th SCARCE International Conference, 26 November 2013, Cádiz 33

34 Summary for Policymakers CLICO - Research Highlights o o o o o Climatic and hydrological factors seem to be less influential than political, economic and social factors for most water-related conflict situations. Democracies are likely to have more domestic water conflicts than autocracies, but autocracies are likely to have more violent water conflicts than democracies. Wars and violence increase the vulnerability of the population to hydroclimatic hazards. States can maladapt, that is they pursue adaptation policies that end up increasing, instead of decreasing, the vulnerability of parts of their population. Social security and civil security institutions such as entitlement schemes, unemployment insurance, universal health care, or flood relief agencies are central for reducing vulnerabilities and providing human security. 4th SCARCE International Conference, 26 November 2013, Cádiz 34

35 Summary for Policymakers CLIMB - Research Highlights o o o o o Climate change contributes, yet in strong regional variation, to water scarcity in the Mediterranean; other factors, e.g. pollution or poor management practices are regionally still dominant. Rain-fed agriculture needs to adapt to seasonal changes; stable or increasing productivity likely depends on additional irrigation. Tourism could benefit in shoulder seasons, but may expect income losses in the summer peak season due to increasing heat stress. Local & regional water managers and water users, lack, as yet, awareness of climate change induced risks; emerging focus areas are supplies of domestic drinking water, irrigation, hydro-power and livestock. Data and knowledge gaps in climate change impact and risk assessment are still wide-spread and ask for extended and coordinated monitoring programs. 4th SCARCE International Conference, 26 November 2013, Cádiz 35

36 Thank you for your attention! Prof. Dr. Ralf Ludwig CLIMB Co-ordinator Department of Geography LMU Munich, Germany Nuraghe Arrubiu Dam Sardinia (Italy) 4th SCARCE International Conference, 26 November 2013, Cádiz 36