32 research outputs found
Forecasting the biogeomorphic development of intertidal wetland restoration: a novel modelling approach
A new bio-geomorphic model approach accounting for subgrid-scale heterogeneity of biogenic structures
Using a composite grid approach in a complex coastal domain to estimate estuarine residence time
This paper is not subject to U.S. copyright. The definitive version was published in Computers & Geosciences 36 (2010): 921-935, doi:10.1016/j.cageo.2009.11.008.We investigate the processes that influence residence time in a partially mixed estuary using a three-dimensional circulation model. The complex geometry of the study region is not optimal for a structured grid model and so we developed a new method of grid connectivity. This involves a novel approach that allows an unlimited number of individual grids to be combined in an efficient manner to produce a composite grid. We then implemented this new method into the numerical Regional Ocean Modeling System (ROMS) and developed a composite grid of the Hudson River estuary region to investigate the residence time of a passive tracer. Results show that the residence time is a strong function of the time of release (spring vs. neap tide), the along-channel location, and the initial vertical placement. During neap tides there is a maximum in residence time near the bottom of the estuary at the mid-salt intrusion length. During spring tides the residence time is primarily a function of along-channel location and does not exhibit a strong vertical variability. This model study of residence time illustrates the utility of the grid connectivity method for circulation and dispersion studies in regions of complex geometry.W.R. Geyer was supported by the Hudson River Foundation
Grant 002/07A,H.G.Arango by the Office of Naval Research,and
John Warner was supported by the USGS Community Sediment
Modeling Project
Variability of residual fluxes of suspended sediment in a multiple tidal-inlet system: the Dutch Wadden Sea
Influence of autoclaving on physicochemical properties of the beet pulp fibres and on several of their physiological effects
International audienc
Glycaemic response to starchy foods : importance of dietary fiber per se versus fiber in relation to food structure
National audienc
Charged and neutral viscous fibres, starch digestion and glucose absorption
International audienc
Effect of extrusion-cooking on the hypoglycaemic properties of citrus fibre: an in vitro study
International audienc