The climate change in the coastal zone by Per Sørensen, Danish Coastal Authority 1 1

Vi vil gerne bevare billedet af de uendeligt lange varme sorgløse dage ved vandet. Men når det er andre værdier, der står på spil, krakelerer billedet….

100 år senere. Ingen børn, men masser af sten og beton. Vi fik andre behov, og andre muligheder for at beskytte os mod havets rasen. Skagen

Coastal tension Land Sea Infrastructur Vi har jo bare zone hvor land og vand mødes. Stiger vandet går det vel ikke noget? Spændingsfeltet opstår fordi mennesker og infrastruktur også er der.

Different risk acceptance 12/18/09 Different risk acceptance

Sea level rise in futures climate Storm water level Danish westcoast

Adaptation needs a strategy 12/18/09 National Regional Landowner

Principles of the Coastal Protection Act (DCA) Need for coastal protection Financial considerations Technical and environmental quality Preserving the coastal landscape Natural development of the nature Recreational use of the coastal area Ensuring public access to the coastal area Coastal protection strategy 2011 Need for coastal protection Risk of flooding Risk of destruction of real property because of erosion of land Means risk of destruction of buildings or infrastructure within a horizon of 25 years Financial considerations What needs protection must be of a certain value The costs of establishing and maintaining the coastal protection must be balanced with the values protected Technical and environmental quality Coastal protection must be balanced with the need. Balance in the dimensions. Balance in size as well as chosen method. Preserving the coastal landscape Include regards to the nature protection act, for dune and beach preservation lines Visual factors – what does it look like? Natural development of the nature Try to obtain a natural development of the coast line. Allow dynamic processes on the coast Recreational use of the coastal area It must still be possible to stay at the beach, go swimming, carry out different activities (playing…) Ensuring public access to the coastal area According to the nature protection act there is public access to the coast and the beaches

Consulting with other authorities and their strategy The Heritage Agency of Denmark Municipalities The Danish Coastal Authority consult with other authorities. Coordination of areas that are also governed by other authorities Which acts take precedence where numerous acts has jurisdiction Typically no superior act: Beach protection line according to the nature protection act versus the need for coastal protection Must be granted exemption from the beach protection line as well as permission according to the coastal protection act. Both are needed or the coastal protection project cannot be carried out. Theory: Different decisions from two different authorities. MInistry of Food, Agriculture and Firsheries The Danish Directoratet of Fisheries Environment Centres

Coastal protection strategy Hjørring municipality 12/18/09 Coastal protection strategy Hjørring municipality Based on City Council goals for the coast nature must have room to maintain the natural conditions in coastal areas as far as possible in order to ensure a diverse coastal landscape and a varied flora and fauna. This means that the municipality as a basis to oppose the creation of new permanent coastal protection systems beyond what is considered necessary for the protection of coastal projection by Lønstrup

Erosion, planlægning og levetid af infrastruktur 2040 2080 Coastal strategy Furreby ? Year 0-20 Year 20-50 Year 50-100 Coastal protection can be done. Hard protection can be alowed where houses are endangered in year 0. Hard protection are removed and only sand nourishment can be allowed. Herby can newer houses in year 0 still reach their lifetime. No permit for coastal protectin because the lifetime of houses are passed.

How to deside when and how to adapt 12/18/09 How to deside when and how to adapt Nessessary information must be achieveable Objective desicion criteras must be agreed upon. Open communication

Planning of erosion coasts Bebyggelsesregulerende foranstaltninger.

Måske screeningsmodellen Planning of flood proned coasts Måske screeningsmodellen

Risk as decision criteria En lille forhøjelse kan betyde stor reduktion af risikoen.

Socioeconomic as decision criteria 12/18/09 Socioeconomic as decision criteria Scenario Category NV Yearly expenses in mio.kr mio.kr 2050 2051-59 2060-69 2070-79 2080-89 2090-98 2099 Basic scenario Expected damages 42.6 1.96 1.96 2.53 3.31 4.46 6.16 6.16 Coastal protection costs 8.0 0.51 0.51 0.51 0.51 0.51 0 0.51 Project scenario Expected damages 10.3 1.96 0.40 0.52 0.69 0.94 1.31 1.31 Coastal protection costs 10.0 2.14 0.54 0.54 0.54 0.54 0.54 0.07 Saved damages (benefits) 32.3 0.00 1.56 2.01 2.62 3.52 4.85 4.85 Expenses (costs) -2.0 -1.64 -0.03 -0.03 -0.03 -0.03 -0.03 0.44 Tax distortions -0.3 -0.28 -0.01 -0.01 -0.01 -0.01 -0.01 0,07 Nett profit (NNV) 29.9 -1.92 1.53 1.97 2.59 3.48 4.81 5.36 Nett benefit pr. public invested kr. 13 Internal rate 80%

How can a decision be made? Go/No Go?