Science Center Objects

Fagan marsh is located along the Napa River and covers 68 hectares. We surveyed 481 elevation points and 241 vegetation plots to determine baseline conditions of the marsh. Water level loggers deployed in 2010 were used to characterize the tidal inundation patterns throughout the year. Sediment accretion rates from soil cores at Coon Island marsh were extrapolated to Fagan marsh and used as input for the WARMER sea-level rise response model. WARMER projects that by 2070 Fagan marsh will be dominated by mid marsh vegetation and will transition into low marsh habitat by 2090. 

Fagan marsh is located along the Napa River and covers 68 hectares. We surveyed 481 elevation points and 241 vegetation plots to determine baseline conditions of the marsh. Water level loggers deployed in 2010 were used to characterize the tidal inundation patterns throughout the year. Sediment accretion rates from soil cores at Coon Island marsh were extrapolated to Fagan marsh and used as input for the WARMER sea-level rise response model. WARMER projects that by 2070 Fagan marsh will be dominated by mid marsh vegetation and will transition into low marsh habitat by 2090. 

FAGAN SLOUGH MARSH

WERC Fagan marsh study area
(Public domain.)
WERC Fagan marsh figures
The elevation histogram for Fagan Marsh shows the marsh platform is above MHW on average (Fig. 1). Data from the vegetation surveys indicate relatively high species richness (Fig. 2).  Results from WARMER response model indicate that Fagan will lose relative elevation as sea levels rise (Fig. 3). The marsh platform at Fagan Marsh is projected to transition to low marsh habitat by 2070 and be below mean sea level by 2090 (Fig. 4). The percent of time Fagan Marsh is inundated varies throughout the year by season, with the most inundation during the winter (Fig. 5).(Public domain.)
WERC Fagan WARMER results
(Public domain.)

To download the Fagan PDF Summary Report (Fagan appendix from USGS Open-File Report Final report for sea-level rise response modeling for San Francisco Bay estuary tidal marshes):