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Oana Iacob @FTF2013


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Oana Iacob @FTF2013

  1. 1. P H D C A N D I D A T EOANA IACOBNatural flood management as aclimate change adaptation option11 April, Facing the Future Symposium 2013Dundee
  2. 2. Outline Introduction to ecosystem services Climate change threat What is natural flood management? Tarland study catchment Hydrological modelling Land use scenarios Climate change scenarios Hydrological modelling tool Conclusions11 April, Facing the Future Symposium 2013
  3. 3. Introduction to ecosystem services Humans have always depended on nature forenvironmental assets like clean water, nutrientcycling and soil formation. These have been called by different names throughhuman history, but are presently gaining globalattention as ‘ecosystem services’.11 April, Facing the Future Symposium 2013
  4. 4. Ecosystem services Humans have changed ecosystems to meet rapidlygrowing demands for food, fresh water, timber, fibreand fuel. This has resulted in a substantial and largelyirreversible loss in the diversity of life on Earth.11 April, Facing the Future Symposium 2013
  5. 5. UK NEA (2011): Relativeimportance of, andtrends in theimpact of direct driverson UK ecosystemservices
  6. 6.  Sea levels are rising Glaciers are retreating Rainfall patterns arechanging Increased frequency ofextreme eventsClimate change ~ 1 in 22 of all residentialproperties & 1 in 13 of allnon-residential propertiesat risk of floodingThe average annual damages ~£720 million to £850 million
  7. 7. Engineered schemes or natural flood management?11 April, Facing the Future Symposium 2013
  8. 8. What is Natural Flood Management? NFM involves the restoration or utilisation of ‘natural’ land cover and channel-floodplainfeatures within catchments throughstoring waterincreasing soil infiltrationslowing waterreducing water flow connectivity11 April, Facing the Future Symposium 2013
  9. 9. Location within thecatchment for NFMtechniquesWWF Scotland, 201111 April, Facing the Future Symposium 2013fisheriescarbonsequestrationoxygenproductionbiodiversityrecreationwaterqualityfloodprotectionwatersupplyclimateregulation
  10. 10. Representation of expected Engineered (Eng) and NFM strategies behaviour inno climate change conditions and with climate change (Iacob et al., 2013)c)11 April, Facing the Future Symposium 2013
  11. 11. Dee catchment, Tarland subbasin11 April, Facing the Future Symposium 2013• Centrally situated tributary of the River Dee in north east of Scotland• Approximately 77 km2• The upper and lower Tarland includes the village of Tarland (600people) and Aboyne ( 2200 people)
  12. 12. TarlandsubbasinIssues identified:1. Flooding2. Low flows3. Loss of habitats4. Poor water quality5. Loss of biodiversitySoil map Tarland Land use map Tarland11 April, Facing the Future Symposium 2013DEM and river network Tarland
  13. 13. Modelling land use and climate scenariosLand usescenariosClimatechangescenarios11 April, Facing the Future Symposium 2013 Land use scenarios arebeing developed toexplore spatial issues andscale issues but alsoassessing the impacts ofdifferent policy drivenland use scenarios andidentify their impacts onNFM optionsperformanceWaSiM-ETHHydrologicalresponse
  14. 14. Land use scenariosBrown et. all, 201211 April, Facing the Future Symposium 2013
  15. 15. Climate change scenariosClimate Change Projections are available for Scotland at a 25 kmgrid size and 12 km grid size11 April, Facing the Future Symposium 2013
  16. 16. WaSiM-ETHmodelFully distributed,physically based modelfor estimating climatechange impactsThe model has a goodflexibility in separatingsurface runoff frominterflow allowing agood reproduction offlood events.11 April, Facing the Future Symposium 2013Schulla , 2012
  17. 17. Conclusions Climate change poses new challenges that need newapproaches for flood risk management Natural flood management has the potential todeliver ‘low regret’ solutions Time lags must be considered inflood vulnerable communities11 April, Facing the Future Symposium 2013
  18. 18. QUESTIONSThank you!11 April, Facing the Future Symposium 2013