The CSI analysis showed that the bar heights were generally higher at the northern and southern parts of the coastline than at the median part before the storm period. Offshore bar migration and flattening of the bars were also typical morphological changes. The eroded sand was typically accumulated at the upper shoreface or transported alongshore to the nearby profiles. In January 2007 a period of high-energetic wave climates and elevated water levels caused local acute erosion to some of the profiles while others experienced no erosion.
The results of these investigations are shown in a technical note there can be found under Filer.ĬSI and morphological changes were analyzed from 8 pre- and post-storm coastal profiles. This project under Building with Nature focuses on acute dune erosion at Skodbjerge and has investigated how this correlated with CSI by the use of the numerical model MIKE 21 IG. HIDTMA has, amongst others, the MIKE 21 solution, which consists of a general numerical modelization system for the simulation of levels of water and flows. Simulation results showed overestimated dune erosion, which was explained by the lack of longshore sediment transport in the simulations.
This correlation was further investigated by numerical modeling of acute dune erosion at Skodbjerge in a 1D model – X-Beach. However, the study showed a correlation between the nearshore bar morphology and dune erosion. This erosion event is investigated through a morphological analysis of good profile data before and after the storm period and by numerical modelling of acute erosion with the MIKE 21 IG model.ĭCA investigated acute dune erosion along the Danish North Sea coast for the period 1977 to 2011 where an applicable explanation was not found. If you need to simulate physical, chemical or biological processes in coastal or marine areas, MIKE 21 almost certainly has the tool you need. Significant acute erosion occurred to the coastal dunes at Skodbjerge in January 2007. MIKE 21 Alternatives MIKE 21 is described as is the ultimate Swiss army knife of coastal modelling. Our crowd-sourced lists contains eight apps similar to MIKE 21 for. These natural barriers are often exposed to storm conditions where a combination of high wave energy and elevated water levels are capable of producing acute erosion of the dune system. The best MIKE 21 alternatives are Storm Water Management Model, HEC-RAS and GeoHECRAS. The aim of this project is to test and use the new MIKE 21 IG model to quantify the dune-strength against acute erosion and see how this correlates with coastal state indicators (CSI).Ĭoastal dunes are natural barriers protecting the hinterland from erosion and flooding under extreme events like storms.
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