Abstract
The mangrove forest in Thailand provides food and many living organisms. Mangrove forests also provide important nursery habitat for many species of fishes. Therefore, knowledge on mangroves distribution and change is importance for effective management. Remote sensing and geographic information system has been widely used to characterize and monitor and studies on mangroves change. The main of research is monitoring mangrove forest land cover changes in Samut Songkhram Province from 2008 to 2018. This study used multi-temporal Landsat TM data and ancillary GIS data to quantify mangrove cover changes in the whole of Samut Songkhram. This research used supervised classification technique and NDVI index. Land-use was classed 6 groups which were mangrove forest area, urban area, agricultural area, bare land area, fishery farm area and water area. The result found that overall accuracy by calculating Error matrix during 53 to 83%. The mangrove forest area is increasing between 2008 to 2011 and 2015–2017. In the other hand, mangrove forest areas are decreased between 2011–2015. Information of mangrove forest area change of this study is very useful to local government and urban planners for the betterment of future plans of sustainable development of mangrove forest.
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