Sensitivity analysis of SLAMM applied to southwest Iberian saltmarshes (SW Spain)

摘要: Coastal wetlands are considered to be sensitive to changes in environmental forcing, particularly sea level rise. Models such as SLAMM1 (Sea Level Affecting Marshes Model) have been used to evaluate coastal wetland habitat response to sea-level rise based on the simulation of key processes. One of the main strengths of SLAMM is the ability to explore system responses to different sea-level rise scenarios, but uncertainties in predicted response will also reflect uncertainties regarding the primary inputs and hence the quality of the original elevation data and habitat classification. Monitoring and measurement of saltmarsh habitats is time consuming and costly, and the acquisition of the SLAMM input layers can require a significant resourcing so some understanding of where surveying efforts should be focused is necessary, particularly for authorities with financial constraints This work undertakes a sensitivity analysis to explore the relative importance of data quality and resolution (spatial and vertical) in the elevation data and the marsh habitat maps (MHM). The sensitivity analysis has been based on running SLAMM over the Odiel saltmarshes (fig. 1), using different inputs data (Table 2, Fig. 2 and Fig. 3) according to the tests shown in Table 1.