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Classification Methods for Mapping Mangrove Extents and Drivers of Change in Thanh Hoa Province, Vietnam during 2005-2018

机译：2005 - 2018年越南在越南映射红树林范围和变革驱动程序的分类方法

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Mangrove forests have been globally recognised as their vital functions in preventing coastal erosion, mitigating effects of wave actions and protecting coastal habitats and adjacent shoreline land-uses from extreme coastal events. However, these functions are under severe threats due to the rapid growth of population, intensive shrimp farming and the increased intensity of severe storms in Hau Loc and Nga Son districts, Thanh Hoa province. This research was conducted to monitor spatial-temporal changes in mangrove extents using Landsat and Sentinel imageries from 2005 to 2018. Unsupervised and supervised classification methods and vegetation indices were tested to select the most suitable classification method for study sites, then to quantify mangrove extents and their changes in selected years. The findings show that supervised classification was the most suitable in study sites compared to vegetation indices and unsupervised classification. Mangrove forest extents increased by 7.5 %, 38.6 %, and 47.8 % during periods of 2005 - 2010, 2010 - 2015 and 2015 - 2018, respectively. An increase of mangrove extents resulted from national programs of mangrove rehabilitation and restoration during 2005- 2018, increased by 278.0 ha (123.0 %).
机译：红树林森林已被全球被认为是防止沿海侵蚀，波动效果和保护沿海栖息地和邻近海岸线 - 使用极端沿海事件的重要作用。然而，由于人口的快速增长，密集的虾养殖以及Hau Loc和Nga Son区，Thanh Hoa省的严重风暴强度增加，这些功能受到严重威胁。进行该研究以使用2005年至2018年的Landsat和Sentinel Imageries监测红树林群中的空间延时变化。考验了无监督和监督的分类方法和植被指数，为学习网站选择最合适的分类方法，然后定量红树林植物和他们在所选年份的变化。调查结果表明，与植被指数和无监督分类相比，监督分类是研究网站中最适合的。 2005年至2010年，2010年2010年，2010年2010年，红树林森林瀑布分别增加7.5％，38.6％和47.8％。 2005年至2018年在2005年至2018年期间的红树林康复和恢复的国家计划增加了红树林植物，增加了278.0公顷（123.0％）。

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