Study on the Strategy for Sustainable Development along the Coast of Thailand

受海平面变化、土壤供给、土壤径流、沉降和潮汐变化的影响，海岸带环境仍在变化。泰国的湄南河三角洲是本研究的目标区域。这一地区包括东海岸和河口周围的许多人工建筑，以及西海岸许多废弃的养虾场。在前期的研究中，我们分析了1987 - 2000年的卫星资料，求解了一个目标区的海岸环境系统。造成海岸侵蚀的原因是红树林的砍伐、废弃的养虾场、地面沉降、土壤径流和海平面上升，所有这些因素都相互密切相关。本研究强调海岸侵蚀问题，从海岸侵蚀与各种成因的关系来阐述海岸环境，利用卫星资料和航片资料进行时间序列分析，揭示了近半个多世纪来海岸的变化。在此基础上，探讨了海岸侵蚀的可靠原因，提出了海岸管理的建议，并建立了综合利用航片和卫星数据的方法。然后我们揭示了海岸线在半个世纪里的变化。通过与人类活动历史的比较，可以更详细地解释海岸线变化的原因。最后，根据本研究结果，探讨湄南河河口海岸管理策略的方向，例如：“如何处理废弃的闭水区”与“如何防止海岸线的侵蚀”。

The coastal environment, which is influenced by the changes in sea level, soil supply, soil runoff, subsidence and tidal changes, is still changing. The Chao Phraya delta in Thailand is the target area of this research. This region includes many artificial structures in the east coast and around the river mouth, and many abandoned shrimp farms in the west coast. Although the target area is exposed to erosion, there is no fundamental counterplan to this problem at present.In the previous research, we analyzed satellite data obtained from 1987 to 2000 and solved a coastal environment system at the target area. The causes of coastal erosion are mangrove deforestation, abandoned shrimp farms, subsidence, soil runoff, and sea level rise, all of which are closely interrelated with each other. We emphasized the problem of coastal erosion, and explicated the coastal environment from the viewpoint of the relationships between coastal erosion and its various causes.In this research, we performed the time series analysis with both satellite data and old aerial photographs, and indicated the coastal changes in over a period of more than half a century. Then we investigated the more reliable cause of coastal erosion and suggested the coastal management for future environmental.We also established a method of synergy use of both aerial photographs and recent satellite data. Then we revealed a change in the coastline over half a century. Moreover, by comparison between change of coastline and history of human activities, we could explain the more detailed causes of coastline changes. Finally as the result of this research, we discussed the direction of coastal management strategy around the Chao Praya river mouth, for example, the priority of "how to process wasted closed water areas" and "how to prevent erosion of the coastline".