Study On Disasters And Prevention Of Erosion And Sedimentation In Xiamen Coast

The coast is a part of boundary of ocean and land,located on the edge of the ocean,it is the transition zone between ocean and land and also is a complex and intersecting geographical area.This study data is based on the survey data,previous research results and so on.Combined with the natural environment,a detailed description and analysis of and regional geology environment and erosion and sedimentation were made.At the same time,this study predicted the coastal erosion and sedimentation of Xiamen and proposed the prevention and control measures from the situation type of the shoreline,actual survey results,erosion and sedimentation zones,prediction of the coastal erosion and sedimentation and some prevention.The conclusions were acquired as following:(1)By analyzing and comparing the relevant historical,previous research data and 4 stages satellite images(1985,2006,2011 and 2016)of Xiamen coastline,artificial shore gradually replaced by the nature coast.(2)Based on the profiles survey data of coast and analysis of erosion and sedimentation between in artificial coastal and natural coastal areas,we find that most of the east coast of Xiamen is in erosion,and some part is very seriously(up to 55cm/a).The coast could be divided into 2 parts: west port and embankment area and east coastal tourist area.(3)The cause of coastal erosion and sedimentation is more complicated in the global change,but we can summarize several factors,including sea level rising,storm,sediment supply and human effect.(4)By strengthening investigation and research of coastal erosion and sedimentation,we built coastal integrated management system and coastal erosion and sedimentation disaster prevention,enhance coastal protection legal awareness.At the same time,we should survey the coastal in high frequency and do the beach nourishment.(5)According to the investigation and the situation of the coast,we could rebuilt and nourished the beach by removing the building in the beach,building the hard and soft revetment to keep the balance of beach system and remove the erosion and sedimentation disasters.