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首页> 外文期刊>Ocean & coastal management >Where is the coast? Monitoring coastal land dynamics in Bangladesh: An integrated management approach using GIS and remote sensing techniques
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Where is the coast? Monitoring coastal land dynamics in Bangladesh: An integrated management approach using GIS and remote sensing techniques

机译：海岸在哪里？监测孟加拉国沿海土地动态：使用GIS和遥感技术的综合管理方法

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This paper draws upon the application of GIS and remote sensing techniqueS to investigate the dynamic nature and management aspects of land in the coastal areas of Bangladesh. The geomorphological characteristic of the coastal areas is highly dynamic where land erosion and accretion with different rates remain a constant phenomenon. This study focuses on three coastal zones: western, central and eastern that comprise the entire coastal area of the country. At its core, this study uses the past 30 year Landsat satellite images. This research reveals that the rate of accretion in the study area is slightly higher than the rate of erosion. Overall land dynamics indicate a net gain of 237 km(2) (7.9 km(2) annual average) of land in the area for the whole period from 1985 to 2015. The results also demonstrate that the rates of both erosion and accretion are higher in the central zone compared to the western and the eastern zones of the coastal area. This is the first time that the entire coastal areas of Bangladesh have been considered for assessment. This study also recommends that coastal managers, planners and policymakers to consider the identified dynamic trends of coastal land before opting for any specific measure. Constant monitoring using the GIS and remote sensing techniques would be a viable management for this purpose. This study has identified some causes of land dynamics, particularly for the three coastal zones, that might be helpful for policymakers in identifying the nature of interventions needs to be taken for specific coastal zones.
机译：本文利用GIS和遥感技术的应用来研究孟加拉国沿海地区土地的动态性质和管理方面。沿海地区的地貌特征是高度动态的，在这些地区，土地侵蚀和增率不同的现象一直是一个不变的现象。这项研究的重点是三个沿海地区：西部，中部和东部，构成了整个国家的沿海地区。这项研究的核心是使用过去30年的Landsat卫星图像。这项研究表明，研究区的吸积率略高于侵蚀率。总体土地动力学表明，从1985年到2015年的整个期间，该地区的土地净增加237 km（2）（年平均7.9 km（2）年）。结果还表明，侵蚀和增生的比率都较高与沿海地区的东部和西部地区相比。这是第一次考虑对孟加拉国的整个沿海地区进行评估。这项研究还建议沿海管理者，规划者和决策者在选择任何具体措施之前，应考虑已确定的沿海土地动态趋势。为此，使用GIS和遥感技术进行持续监测将是可行的管理方式。这项研究已经确定了土地动力的某些原因，特别是对于三个沿海地区的土地动力，可能有助于决策者确定需要对特定沿海地区采取干预措施的性质。

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