Modelling coastal erosion in bjärred, lomma municipality / Long-term evolution and protective measures
The aim of the present work was to investigate the erosion phenomena taking place at the coast in Bjärred and the possibility of introducing additional protective measures. An aerial photograph analysis showed that the beach has eroded an average of 4.3 m during the time period 1963–2002. Among the measures applied by the municipality in the past, only concrete slabs had a good performance by completely halting the erosion at the site. Calculations of cross-shore transport rates showed that the erosion will increase greatly with a future sea water level rise. One main part of the study was to run simulations of the study area using the shoreline evolution model GENESIS. The simulated protective measures were placement of breakwaters, revetments (concrete
slabs or sheet piles) groins and beach nourishment projects. The analysis of the shore evolution, also including financial and environmental aspects, lead to the conclusion that placing revetments in combination with beach nourishment (with vegetation added to the sand) was a good option and should be further investigated.