The upper Gulf of Thailand (UGOT) coastline areas together five consecutive Province Samut Sakhon is Bangkok.Samut Prakan and Chachoengsao a river that flows into the Gulf of Thailand four major rivers.is the mae klong River,The tajane river The Chao Phraya River and the bang pakong River. The area is characterized by clay sediments estuary. Play about 19-21 meters of soil covered with mangroves that are a fertile and a large area of mangroves, with a top covering the entire length of the 100 km It also faced the problem of coastal erosion is always a slow continuous for a long time.. It coastline was apparently lost in the sea waves several meters per year. Some may reach 10-20 meters per year, an area with a severe erosion at critical areas, such as coastal areas. Area Bangkok The sea boundary is approximately 4.7 kilometers. And erosion over thousands of acres Bang pakong district, sub-district, two Canal area, chachoengsao and tambon Klong Dan. Amphoe bang Bo, Samut prakan province, experiencing a severe erosion of the coast. Causing a loss to the economy - society. Including coastal ecosystems in these areas and also makes it impossible to develop the use of public space as an area for recreation and ecosystem preservation.In addition, some areas may be used as aquaculture, too. Because in the Gulf of Thailand. Most of the mangroves and tidal erosion annually. And a horizontal length that would have eroded much more intense. Causing the suffering of communities living along the coast. And damage to the economy each year hundreds of millions of baht. Some areas have not had a problem like Phra Samut Chedi. Samut Prakarn Province Department of marine and coastal resources as a responsible authority and is aware of the problem.It is necessary to collect all the study and further education to master plan and operating plan to solve the problem of coastal erosion in the long term.