The art of climate adjustmentMelissa2024-06-26T15:26:32+02:00 The art of climate adjustmentClimate-proofing is expensive, but so is damage caused by flood, which is why several economic considerations are at stake when assessing the level needed of climate-proofing against flooding. A lot is at stake when complex challenges are to be solved. On one hand, finances must add up and on the other side, citizens and nature must be taken into account. There is no doubt that further climate-proofing is imperative, but the question of where and how much is inevitable, seeing that climate changes are increasing. A well-balanced solution Artelia has helped Middelfart Municipality find the optimal balance. First, we had to simulate flood from cloudburst in the entire municipality in order for the results to be applicable for pointing out risk areas in the climate-proofing plan that was released in 2022, Lasse Bo BrinchDesign EngineerDrainage In cases where cloudbursts pose a risk of flood, the sewerage works Middelfart Spildevand A/S was asked to assess how the sewer system may be optimised in order to secure the areas. Artelia was hired as consultant once again. Together with Middelfart Spildevand A/S, we based our work on service level regulation 2276 and the accompanying guidance that contain a method to be used for calculating which solutions have fewest costs when determining the service level for handling rain water in a certain area. This means that costs for establishing and operating the initiatives throughout their lifespan will be assessed in relation to the damage that floods may cause in the same period depending on the efficiency of the solutions. © Colourbox, Knud Erik Christensen Specific suggested solutions In order to determine the most balanced level for climate-proofing, specific suggested solutions must be prepared for several different service levels in the risk area. Suggested solutions are then modelled and dimensioned in a hydrodynamic modelling programme where Artelia has used MIKE+. Based on that, construction and operation costs can be calculated. At the same time, potential costs for damage must be calculated based on the rainfall events that will exceed the service level in the entire lifespan of the facility in question. It is therefore necessary to calculate damage caused by several rainfall events for each of the service levels that are included in the analysis. That will result in a great deal of calculations. In order to have the best basis for evaluating how to prioritise, we have provided more than 25 suggested solutions and conducted 100 flood calculations in MIKE+ in relation to the assignment in Middelfart. The method used for the analysis of the service level for handling rainwater in a given area can also be used for potential flooding from e.g. storm surge or freshwater. Flooding map
