EstProc - Implementation of manning algorithm for settling velocity to an estuarine numerical model (TR 146)

Baugh, J. (2004) EstProc - Implementation of manning algorithm for settling velocity to an estuarine numerical model (TR 146). Technical Report. HR Wallingford, Wallingford.

PDF TR146.pdf Download (280kB)

Abstract

Produced within Defra Project FD1905 (EstProc). An important element within the EstProc studies was the implementation of the new or refined algorithms, produced under EstProc, into numerical models. The implementation stage was important as any extension in the understanding of estuarine processes from EstProc was required to be suitable for dissemination into the wider research community with a level of robustness for general applications demonstrated. This report describes work done to implement one of the algorithmic outputs of the EstProc project into a 3D computational model of estuarine hydraulics and sediment transport (TELEMAC3D, developed by EDF-LNHE). The algorithm chosen as appropriate to the modelling requirements was the new formulation for settling velocity of mud (Manning, 2004). For the purpose of implementing the Manning algorithm for settling velocity to an estuarine numerical model an existing model of a length of the Lower Thames estuary was chosen. This model was of interest because it had already been used for comparison of simulated sediment distribution with detailed sediment concentration measurements using the ADCP acoustic backscatter method Sediview, studies which included a number of model sensitivity tests. The model results with the Manning algorithm included were compared to runs with (1) a constant settling velocity of 0.5 mm/s and (2) settling velocity based on a simple linear multiplier of concentration and with the above mentioned observations of suspended concentration.

Actions (for site administrators only - login required)

View Item