REAL TIME SAFETY ON SEDIMENTARY COASTS

In large parts of The Netherlands the coastal defense consists of sandy coasts, which deform under storm impact. Therefore, coastal authorities need up-to-date and accurate information about the actual state and trend of their coastline. This information supports decisions on managing coastline regression, wave overtopping, dune erosion and inundation in the event of storms. It allows coastal authorities to monitor the safety of the coastal defence against flooding. In addition, monitoring the nearshore zone is important regarding swimmer safety.

In the Flood Control 2015 RTSANCO project which started in 2010 an effort has been undertaken to meet this need from a tools-perspective. This project aims to develop a real-time system capable of monitoring and predicting water levels, beach and dune erosion under storm conditions (for safety issues) and flow patterns under everyday conditions in order to improve coastal risk management. The project researches the applicability of a number of techniques for real-time assessment of the state of sedimentary coastlines, including dune erosion and swimmer safety. Some examples:
- The CoSMoS system (Coastal Storm Modelling System, co-developed with the USGS) , a real-time swimmer safety operational forecast system, currently provides forecasts of the timing and location of potential rip currents, with updates every twelve hours in a Matlab environment.
- A generic operational modelling system (OMS-HC) is developed capable of simulating water levels, wave heights, flow velocities, beach and dune erosion under storm conditions (for safety issues) and flow patterns under everyday conditions in order to improve coastal risk management.  The OMS-HC is capable of providing automatically every 12 hrs a 3-day forecast.

The model systems have already proven its usefulness for process research and long-term beach profile monitoring.

A 3D overview of the XBeach model domain for the coastal area of Westkapelle

A 3D overview of the XBeach model domain for the coastal area of Westkapelle.

Data
Participants: Deltares, Arcadis, Fugro, Shore Monitoring NL
Stakeholders: HHNK, Wetterskip Fryslan, Egmondse Reddingsbrigade, Monsterse Reddingsbrigade, Rijkswaterstaat, Egmondse Reddingsbrigade, New Forest District Council (UK), Channel Coastal Observatory (UK), States of Jersey, (UK), U. Plymouth (UK)

Mission Flood Control 2015

“A really substantial improvement in operational flood protection worldwide.”