Operational Radar and Optical MApping Partners The OROMA team consists of 7 developers and 4 end users from coastal management: Overview Beach nourishment is the most valuable measure to conduct coastal protection. To keep control on the sand induced to the near shore environment it needs area covering monitoring. As examples of the OROMA work two different methods using ground based radar for the bathymetric survey are presented at this poster: Imaging the ocean wave field Scanning sea surface roughness The water quality is indicated by its concentration of algae, suspended matter and yellow substance. These substances can be measured by optical remote sensing from space borne sensors. However, the quality of these measurements needs to be assessed and compared with existing archives of monitoring data of the same geophysical quantities in order to introduce them into the monitoring programmes. Objectives Monitoring of near coastal morphodynamics and water quality parameters Combining Remote Sensing Modelling and Electronic Networking Techniques Presentation of most actual coastal monitoring information in near-real time Amt für ländliche Räume Husum Information Abstraction within OROMA Information abstraction is the backbone of OROMA. Measurements from ship and remote sensing data from land, aircrafts and satellites need to be inte- grated into models in order to provide thematic information. Their access has to be made easily available to coastal managers.

Operational Radar and Optical MApping Bathymetry changes derived from radar Bathymetric maps are deduced by inverse modeling 10 minutes radar observations of the ocean wave field. The model uses the wave refraction depending on the local water depth. The shown bathymetric change is observed between 2001 and Close to shore a loss of sand is obvious, whereas a broad stripe between 200 m and 800 m distance from shore shows significant increase of sand. At the distance of around 1000 m we state another sand reduction zone. These results have been verified by conventional observations. On the right the local water depth is given with “z” pointing upwards. Under the use of a calibrated radar the Normalised Radar Cross Section (NRCS) was composed to a map. High gradients in the bathymetry induce high radar cross sections. The next step during the still running OROMA project is to train an hydrodynamic model to reproduce the radar map from the actual bathymetry. At a later time only the radar map will be acquired and the model will be inverted to produce the new bathymetry. Monitoring of the water quality by ships is time and cost consuming. Water constituent concentrations derived from space borne sensors MERIS, SeaWiFS and MODIS provide complementary data, potentially leading to a reduction of in-situ measurements. It has been proven that the remote sensing data are comparable to the existing long-term in-situ archives by local calibration of the underlying bio-optical algorithms. Comparison Normalised Radar Cross Section with Depth Water quality monitoring