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The use of MOGREPS ensemble rainfall forecasts in operational flood forecasting systems across England and Wales
This paper presents research funded by the Environment Agency in which ensemble rainfall forecasts are utilised and tested for operational use.
Discussion on Three-dimensional (3D) modeling of non-uniform sediment transport in a channel bend with unsteady flow
Discussion of the article by Eric Mosselman.
Gravel beaches with seawalls
This paper focusses on some fundamental aspects of gravel beaches and revetments with dynamic rock slopes. Obviously, the response of gravel beaches depends on parameters such as the wave height and the stone size. Here, other parameters such as the permeability of the subsoil, the influence of sand in the pores of gravel, and the influence of seawalls have been studied.
Operational scour management for safe jack-up operations
Scour is an imminent threat for jack-up operations in shallow waters with sandy seabed conditions, strong tidal currents and/or a harsh wave climate, such as the North Sea. Jack-up operations in scour-sensitive areas require jack-up operators to evaluate the risk of scour and to adapt a scour management strategy in order to safeguard against foundation failure. Jack-up deployments are characteristically short term operations.
Controls on river delta formation : insights from numerical modelling
Primary hydraulic and sedimentary controls on river deltas were previously postulated in classification schemes based on many field observations. The authors use detailed numerical modelling to assess the influence of wind-generated waves and tides on clastic river delta formation. The results provide a framework for physics-based river delta modelling under various environmental conditions.
Advances in data assimilation for operational hydrologic forecasting
The abundance of new hydrologic observations (in situ or remotely sensed) in the past couple of decades has stimulated a great deal of research into the use of these observations for improved hydrologic predictions via model-data infusion applications. The workshop was attended by 34 participants from 12 different countries. This workshop was jointly organized by Deltares and the Office of Hydrologic Development, National Weather Service, National Oceanic and Atmospheric Administration (NOAA), with major funding through the Flood Control 2015 project.
Numerical simulations of upstream and downstream overdeepening
Local geometrical perturbations of alluvial channels can generate a pattern of non-migrating bars and pools. This phenomenon is known as "overdeepening", because the pools locally enhance the scour in river bends. Overdeepening occurs only downstream of a perturbation if the channel is in the subresonant and subcritically damped regime, which corresponds to channels with moderate width-to-depth ratios.
Towards practical applications in ensemble hydro-meteorological forecasting : preface
This special volume of Advances in Geosciences "Towards practical applications in ensemble hydrometeorological forecasting" solicited and received a large number of high quality submissions on the use of ensemble hydro-meteorological forecasting in a broad range of practical applications.
Application and validation of mortality functions to assess the consequences of flooding to people
The assessment of potential consequences of a flood event to the exposed population is a key question for flood risk managers. This issue is increasingly a triggering research on assessing potential numbers of fatalities because of flooding. In the past, mortality functions were proposed to estimate the fatalities in areas that are exposed to a hazard because of flood defence failures in the Netherlands. This paper describes a study undertaken to validate those mortality functions and assesses their applicability for appraising consequences of flooding to people in a UK-specific context. The functions were applied to the 1953 North Sea Storm and, in particular, to the Canvey Island that suffered from 58 fatalities as consequence of this flood event. Provides a review of the criteria used to apply the functions, as well as guidelines for applying these functions in a UK context.
MHBox - modelling and forecasting water levels and currents in Singapore regional waters
This paper discusses the water level observations, the numerical flow models for the South China Sea and Singapore waters and the OpenDA methodology that is used to optimize and further improve these models. Recent bathymetry data, historic satellite data in combination with coastal station data have been used to rigorously and successfully improve the model representation of currents and levels to match most operational requirements of navigation and port operations.