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Towards science based wetland standards in Scotland Johan Schutten Senior Wetland Ecologist SEPA
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Scottish wetlands driven by water: climate, topography and geology
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Why does SEPA regulate wetlands? Water Framework Directive and WEWS Act (2004) Groundwater body characterisation (risk screening) Groundwater body classification (significant damage cause by the status of the gw body) Surface water body classification (via vegetation as part of Hydromorph quality element) Nature Conservation (Scotland) Act (2004) (advising SNH) Flood risk management (Scotland) Act (2009) (risk assessment) Climate change (Scotland) Act (2009) (C-store and accumulation in properly managed wetlands) CAR: Application screening Licensing determinations Impact analysis
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What knowledge do we need to do our job? What wetland types exist in Scotland Where are these wetlands (inventory) How sensitive are these wetland types to antropogenic pressures (nutrients, change in water supply); i.e Devising standards
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Scottish Wetland Types Functional types to enable risk screening Easy recognisable by non-specialist staff Defines 17 wetland habitat types (including 10 sub-types) Functional wetland types – based on general habitat, landscape and hydrological setting Each wetland type has one or more field indicators (soil, landscape, vegetation) Project produced a field manual, identification sheets, survey forms, and training material http://www.sepa.org.uk/science_and_researc h/what_we_do/biodiversity/wetlands.aspx http://www.sepa.org.uk/science_and_researc h/what_we_do/biodiversity/wetlands.aspx
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Functional Scottish wetland typology
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Scottish Wetland Inventory Partnership project: SNH, RSPB, SWT Collates existing digitised and non- digitised spatial wetland information; deliver summer 2011 + gap analysis to inform further stages Available via the new ‘Scotland’s Environment Web’
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Wetland science Science based standards: Dedicated observation / monitoring in Scotland, in co-operation with SNH and landowners Learn from literature and apply to the Scottish climate and geology (EA / Europe and further afield) 7 wetland complexes under 4-y monitoring (2009-2013; Envirocentre & Sniffer projects), Choosen on basis of target wetland types, geology, climate, topography water balance: rain, surface water level, groundwater level (100 observations, 50+ automated, hourly)
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level duration curves Water level standards
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Wetland Chemical standards Develop chemical triggers (N and P species) that screen out wetlands NOT at risk With UKTAG Wetland Task Team and Groundwater task team Co-operation sought from EU: GW-C Values (for a limited number of wetland types, based on Scottish Wetland typology) for consultation end 2011 Data: Scotland: 56 GWDTE’s in SSSI and in good condition with direct linked groundwater monitoring points (with SEPA GTT) AND 7 wetland complexes in our monitoring program (5 in good condition, 2 likely impacted) England/Wales: 125+ GWDTE’s in SSSI and in good condition with direct linked groundwater monitoring points NI and Irish EPA info At this stage no EU data, but building after WG-C involvement
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Nitrate (as N, mg/l)
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Conclusions 17 useful Scottish wetland vegetation types, based on function Wetland inventory delivers phase 1 in summer 2011 Wetland monitoring provides data for quantity and quality standards Monitoring runs over 4y (to 2013) Preliminary level data very good need further analysis Preliminary quantity data is used for WFD risk screening, for consultation end 2011
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Questions
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