Study of the coastline in the intervention area of the APA, I.P./ARH of the Tagus – Analysis of the evolution of the coast line on sandy low coast in the last 50 years

Study of the coastline in the intervention area of the APA, I.P./ARH of the Tagus – Analysis of the evolution of the coastline on low sandy coast in the last 50 years. Deliverable 1.2.2.2.a. To identify these trends of evolution, whether they indicate progradation or regression, it is necessary to define the concept of coast line and analyse their evolution in an appropriate time interval.塔霍河APA, I.P./ARH干预区域海岸线研究——近50年低缓沙质海岸海岸线演变分析，交付物1.2.2.2.a。为明确此类演变趋势，即判断海岸线属于进积（progradation）还是退积（regression），需先明确海岸线的概念，并在合适的时间区间内对其演变过程展开分析。