tailieunhanh - Mapping Geomorphological Environments Phần 10

Tham khảo tài liệu 'mapping geomorphological environments phần 10', khoa học tự nhiên, công nghệ môi trường phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Geomorphological Mapping Case Studies Geomorphological mapping By the method of geomorphologic mapping we can locate trace and analyze the lanforms which appear in the study area and therefore we can define the morphogenetic processes that contributed to the shaping of the earth s relief since the Pleistocene. The following are examined The presence of planation surfaces and the relation between them. The types of slopes and their form. The shape of the valleys. The Quaternary deposits cones alluvial deposits calcareous sandstones and terraces . The coastal landforms Tombolos beachrocks littoral longshore drifts man made structures dunes ea. . The relative sea level changes and their impacts on the coastal environment during the Holocene. The recent and ancient human impact on the earth s relief. Methodology-Equipment The geomorphological mapping was carried out in two stages I. The coastal geomorphologic mapping The mapped coastal zone includes the region between the area influenced by wave action and the area of a -10m depth approximately. The geomorphological research of the coastal area included Detailed mapping of the landforms along the coastline in order to define the factors that have affected the shaping of the coastal environment. Submarine research for the location of the submarine landforms for the acquisition of data related to Holocene sea level changes. Sampling in several deposits for laboratory analysis in order to define the physicochemical conditions of their creation and their enviroments. The coastal mapping was performed during 1988-1989 which means that the presented data mainly the ones concerning man made structures is valid up to 1989. For the mapping we used topographic maps of 1 5000 scale provided by the HAGS. The total length of the mapped coastline was approximately 67 5 Km. II. Terrestrial geomorphological mapping The terrestrial zone includes the region between the end of the coastal zone and the watershed limit of the drainage .