Project title: Flood hazard and flood risk mapping for the Danish implementation of the EU Floods Directive
Project duration: 2018 - 2020
Client: Ministry of Environment and Food of Denmark/Danish Coastal Authority
Contracting Authority: Ministry of Environment and Food of Denmark/Danish Coastal Authority
Countries: Denmark
General Objective
The project was part of the implementation of EU Floods Directive (Directive 2007/60/EC) in Denmark. In Denmark, it is the responsibility of the government to identify areas of potential significant flood risk and to map the flood hazard and flood risk in these areas.
Specific Objective
The purpose of the project has been to properly represent the flood challenges in the 14 areas of significant risk in Denmark, of both current small flood events and possible future extreme flood events. In this way, the models are forced with extreme conditions that must still result in realist flood scenarios used for flood risk planning in the municipalities. AXI HYDRO SOLUTIONS SRL has been responsible for 3 of the 14 significant risk areas in Denmark: Holstebro, Vejle and RandersFjord.
The flood hazard maps are based on dynamic hydraulic flood modelling in each area of risk, using the high-resolution Danish terrain model, adjustments by the municipalities, measurements of rivers, embankments etc. The flood maps are determined for several scenarios in each area, ranging from current high probability events to future very low probability events, and in some fiord areas, also combined events, with flooding for the river and sea happening at the same time.
Size of projects
• Holstebro: the river basin has 752 ha, 19km rivers: Storå river 5km (1D+2D), Vegen Å river 14km (1D+2D).
• Vejle: the river basin has 3836 ha, 15 km rivers: Vejle Å river 10km (1D+2D), Højen Å river 2km (1D+2D), Grejs Å river 3km (1D+2D); the coastline has 31 km.
• RandersFjord: the river basin has 32034 ha, 87 km of rivers: Nørea river 40 km (2D), GudenÅen river 20 km (1D+2D), Alling Å river 27km (1D+2D); the coastline has 103 km.
Services provided by AXI HYDRO SOLUTIONS SRL:
• Provided support in creating the methodology of the implementation of the EU Floods Directive in Denmark;
• Prepared and carried out the needed modelling work;
• Provided the hazard and risk mapping need for the preparation of flood risk management plans.
Results publication
