Re-measurement of watercourses as a basis for the analysis of flood hazard maps

Find out more about our contribution to updating flood hazard maps in Rhineland-Palatinate

The basis of the new 2D hydrodynamic model system is survey data of the water bodies, in particular cross-section data. In view of the need to update flood hazard maps and revise the outdated survey basis, watercourses are being resurveyed.

We are pleased to announce that we have won three lots in a public tender by the Rhineland-Palatinate State Office for the Environment, with the largest lot comprising the survey of the Kyll. The Kyll, a body of water around 128 km long, flows into the Moselle at km 184. The area to be surveyed extends from the tailwater of the Kronenburger See dam to the estuary.

To ensure seamless integration into the digital terrain model of the foreland, all watercourse profiles are recorded at least up to 5 m behind the top of the slope of the drainage cross-section. The bed of the watercourse is surveyed using multi-beam sampling. Once the surveying work has been completed, the raw data is checked and processed.

The scope of the surveying work includes around 1900 watercourse profiles, approx. 700 structure profiles, around 260 km of longitudinal structures and the measurement of 5 gauges. The implementation period extends from December 2023 to May 2024.