Libellule® zone Environmental measures of Port 2000 Kervigen marsh Vurpillères stream Mudflats rehabilitation Repositories Depending on the targeted Creation of 100 ha of mudflat Ecological neutrality of Port Reduction of 50 kg nitrate per Ecological restoration of the Objective for valuation market 2000 on the shorebirds in the year through restoration of site to its itinial state estuary marshes e.g. Dissolved oxygen Surface of mudflats Abundance of shorebirds in Absorbed nitrate Species richness Metrics the estuary Initial level State of metric before works Null Number of shorebirds before Absorbed nitrate without the Number of species before impact marsh restoration Evolution of metrics during Surface of mudflats observed Variation of number of birds Purification performance Number of observed species Intensity of time in 2008 and 2012, we assume from 2005 and return to the associated to the latest in 1993, 1998, 2002 and restoration linear growth between baseline in 2010. measures in 2008. 2007, we assume linear observations growth between observations Management plan maintains Site is stabilised in 2012. Return to the baseline in 2010. Management plan maintains In 2007, level of service is Hyptohsesis on the final level level of service to its 2011 performance to its 2008 state. back to its initial level. state. Dissolved oxygen in the Or Objective of mudflat creation Number of birds in the estuary Nitrate reduction objective (50 Species richness in 2007 Reference state lagoon (100 ha) in 1997 tons per year) Beginning of works (2007) Beginning of works (2005) Beginning of impact (1997) Beginning of project (2010) Start of project (1997) Reference date DSAYs 1.26 9.12 0.131 0.079 5.79 Table 9 - Synthesis of the application of HEA for valuation of actions of restoration of aquatic ecosystems
Libellule® zone Environmental measures of Port 2000 Kervigen marsh Vurpillères stream Mudflats rehabilitation Repositories Objective for valuation Depending on the targeted market Creation of 100 ha of mudflat Ecological neutrality of Port 2000 on the shorebirds in the estuary Reduction of 50 kg nitrate per year through restoration of marshes Ecological restoration of the site to its itinial state Metrics e.g. Dissolved oxygen Surface of mudflats Abundance of shorebirds in the estuary Absorbed nitrate Species richness Initial level State of metric before works Null Number of shorebirds before impact Absorbed nitrate without the marsh Number of species before restoration Intensity of restoration Evolution of metrics during time Surface of mudflats observed in 2008 and 2012, we assume linear growth between observations Variation of number of birds from 2005 and return to the baseline in 2010. Purification performance associated to the latest measures in 2008. Number of observed species in 1993, 1998, 2002 and 2007, we assume linear growth between observations Hyptohsesis on the final level Management plan maintains level of service to its 2011 state. Site is stabilised in 2012. Return to the baseline in 2010. Management plan maintains performance to its 2008 state. In 2007, level of service is back to its initial level. Reference state Dissolved oxygen in the Or lagoon Objective of mudflat creation (100 ha) Number of birds in the estuary in 1997 Nitrate reduction objective (50 tons per year) Species richness in 2007 Reference date Beginning of works (2007) Beginning of works (2005) Beginning of impact (1997) Beginning of project (2010) Start of project (1997) DSAYs 1.26 9.12 0.131 0.079 5.79 Table 9 - Synthesis of the application of HEA for valuation of actions of restoration of aquatic ecosystems