Figure 1.
Location of the transect analysis for the Caernarvon Basin in southeast Louisiana. Panel A
indicates the topo-bathymetric view used to obtain wetland-water ratio (WL) during the transect analysis. The color map shows depth below sea-level in meters, and the solid white line indicates the location of the transect where the analysis was performed. Panel B indicates habitat distribution used to obtain wetland roughness (WR) during the transect analysis. The color map shows the value for the Manning’s n indicator of bottom friction, and the solid white line indicates the location of the transect where the analysis was performed.
Table 1.
Estimated storm surge impacts and marginal values of changes in wetland continuity (WL) and roughness (WR).
Figure 2.
Attenuation (AS) of storm surge (S) as a function of wetland continuity (WL) and roughness (WR) along a storm track segment of distance (x) in m for four hurricanes in the Caernarvon Basin of southeast Louisiana.
Panel A shows maximum attenuation as influenced by wetland continuity, , where WL is represented by the wetland/water ratio ranging from open water (WL = 0) to solid marsh (WL = 1). Panel B shows maximum attenuation as influenced by wetland roughness,
, where WR is represented by Manning’s n for bottom friction caused by degrees of wetland vegetation ranging from no vegetation (WR = 0.02) to high dense vegetation (WR = 0.045). Storm A = Central pressure of 96 kPa, radius to maximum winds (Rmax) of 67 km, forward speed of 20.5 km/hr. Storm B = Central pressure of 93 kPa, radius to maximum winds (Rmax) of 47 km, forward speed of 20.5 km/hr. Storm C = Central pressure of 96 kPa, radius to maximum winds (Rmax) of 46 km, forward speed of 20.5 km/hr. Storm D = Central pressure of 93 kPa, radius to maximum winds (Rmax) of 33 km, forward speed of 11.1 km/hr.