Water flow in the Duplin River

Overview Modeling experiments are being designed to simulate processes controlling the dynamics of the Duplin River and its interaction with the intertidal areas. The goal is to quantify salt transport and diffusion parameters in the area. The TELEMAC model was chosen for this study, a flow model based on finite element techniques developed by the Laboratoire National d’Hydraulique (EDF -Paris). The nature of the finite element mesh allows the fitting of various sized elements within a specified boundary, permitting high resolution in areas of increased bed slope or narrow channels and low resolution in areas where detail is not required. This particular feature makes the model ideal for incorporating the complex boundary and topography of the Duplin River. Data from the "Directed Study" of August 2003 are being used to validate this model. Measurements from Station GCE 6 (Doboy Sound) furnish the boundary condition at the river mouth, while measurements from stations 1, 2, 3, 4 and 5 in DUPLEX I furnish data for model validation.

Associated GCE LTER research questions Question 2: How do the spatial and temporal patterns of biogeochemical processes, primary production, community dynamics, decomposition, and disturbance vary across the estuarine landscape, and how do they relate to environmental gradients? (more information)