Recent sedimentation patterns within the central Atchafalaya Basin, Louisiana

Sedimentation in created freshwater riverine wetlands: 15 years of succession and contrast of methods

“…This means that both productivity of the wetlands themselves and pollution control of the watershed can be advanced through sedimentation in wetlands. Sedimentation in freshwater wetlands has been investigated by Brueske and Barrett (1994) and Fennessy et al (1994) at created wetlands at the Des Plaines River Wetlands in northeastern Illinois; Braskerud et al (2000) in southeast Norway; Hupp et al (2008) at the Atchafalaya Basin of Louisiana, USA; Kleiss (1996) in eastern Arkansas, USA; Craft and Casey (2000) in Georgia, USA; Mann and Wetzel (2000) in Alabama, USA; Darke and Megonigal (2003) at coastal marshes of Virginia, USA; and Sánchez-Carillo et al (2001) at Las Tablas de Daimiel, Spain.…”

“…Sedimentation has been measured with several methodologies, including: rare-earth stable tracer horizons like Cs-137 and Pb-210 (Craft and Richardson, 1993;Bernal and Mitsch, 2012), horizon markers (Knaus and Van Gent, 1989;Harter and Mitsch, 2003;Hupp et al, 2008), sediment traps and bottles (Mitsch et al, 1979a;Brueske and Barrett, 1994;Fennessy et al, 1994;Braskerud et al, 2000;Braskerud, 2001;Nahlik and Mitsch, 2008), dendrogeomorphic techniques (Hupp and Morris, 1990;Hupp et al, 1993), and sedimentation plates (Mitsch et al, 1979b;Braskerud et al, 2000;Braskerud, 2001). Variable methodologies have led to inconsistent and poorly comparable sedimentation rates.…”

Establishing a sediment budget in the newly created Kleine Noordwaard wetland area in the Rhine-Meuse delta

“…There are three likely causes for the weak relations we found in the Kleine Noordwaard study area: 1) the small gradient in surface topography and a large variation in micro-relief by the presence of mudflat runnels, old furrows, and ditches (Whitehouse et al, 2000;Takekawa et al, 2010;Fagherazzi and Mariotti, 2012); 2) the absence of vegetation (Neubauer et al, 2002;Darke and Megonigal, 2003;Vandenbruwaene et al, 2015), and 3) the small tidal range and water depths (Mariotti and Fagherazzi, 2013). These three factors result in an uniform sediment distribution by 15 firstly, micro topographic flow paths during low water levels (Hupp et al, 2008;Temmerman et al, 2005a); secondly, sheet flow during high water levels (Vandenbruwaene et al, 2015;Temmerman et al, 2005a); or thirdly, a relatively large impact of shear stress (Fagherazzi and Mariotti, 2012) of wind waves and currents, which hamper sediment settling and/or promote sediment redistribution across the tidal flats. However, it could also be argued that the absence of a clear relation between the total mud accumulation and the distance to the channel is due to the fact that sedimentation is not limited by sediment depletion waves are generated by the transfer of energy from wind to the water surface.…”

Sensitivity of a Floodplain Hydrodynamic Model to Satellite-Based DEM Scale and Accuracy: Case Study—The Atchafalaya Basin

“…This drainage basin with an area of 5670 km 2 includes bottomland hardwoods, swamps, bayous, and backwater lakes [36,37] in the United States, holding a rich abundance and diversity of terrestrial and aquatic species. The Atchafalaya River's immense floodplain is bounded by levees on the east and west sides separated by 20 to 30 km.…”