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首页> 外文期刊>Chemical geology >Characteristics of Mainland Coastline Changes in Southeast Asia during the 21st Century
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Characteristics of Mainland Coastline Changes in Southeast Asia during the 21st Century

机译：21世纪东南亚大陆海岸线变化的特点

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摘要

Based on multitemporal Landsat images covering the entire coastal zone, a visual interpretation method was adopted to extract the coastlines of mainland Southeast Asia (MSA) in 2000 and 2015 referencing Google Earth images and global distribution of mangrove data. Coastline structures, coastline fractal dimensions, coastline change rates, and patterns of land-sea interchange were analyzed to reveal the spatial-temporal characteristics of mainland coastline changes in the 21st century. The results showed that (1) during the past 15 years, the length and percentage of natural coastline decreased from 15,440.24 km (83.33%) to 14,909.75 km (78.91%) and artificial coastlines increased at an average growth rate of 29.04% from 3088.79 to 3985.89 km; (2) the fractal dimensions of most areas in MSA tended to increase under interference driven by human activities, and the coastline morphology became more complex overall; (3) coastlines had obvious evolution, in which 18.54% of the coastline advanced toward the sea and 11.25% retreated toward land at average rates of +20.36 and -15.41 m.a(-1), respectively; and (4) the number of patches representing land-sea interchange reached 6607 so that the net land expansion area was 534.25 km(2) and among these regions, those larger than 1 km(2) accounted for only a small percentage (2.54%) of the total number but 79.41% of the total area. These hot spots were mainly concentrated in Myanmar, followed by Vietnam and Malaysia. Overall, the coastline of MSA was characterized by rapid artificial growth but still had a high percentage of naturalization. When it comes to developing the marine economy and addressing the ecological risk, the intensity of utilization and hardening of the coastline will likely increase.
机译：基于覆盖整个沿海地区的多立体兰德图像，采用了一种视觉解释方法，提取2000年和2015年大陆东南亚（MSA）的海岸线，参考Google地球图像和红树林的全球分布。分析了海岸线结构，海岸线分形维数，海岸线变化率和陆海交汇模式，揭示了21世纪内地海岸线变化的空间时间特征。结果表明，（1）在过去15年中，自然海岸线的长度和百分比从15,440.24公里（83.33％）降低至14,909.75公里（78.91％），人工海岸线的平均增长率从3088.79增加到29.04％ 3985.89公里; （2）MSA中大多数地区的分形尺寸往往在人类活动驱动的干扰下增加，并且海岸线形态总体变得更加复杂; （3）海岸线具有明显的进化，其中18.54％的海岸线进入海洋，11.25％分别以+20.36和-15.41 m.a（-1）的平均速率撤退。 （4）代表陆地互换的贴片数量达到6607，以便净土地扩建区为534.25公里（2）和这些地区，大于1公里（2）只占小百分比（2.54％） ）总数但总面积的79.41％。这些热点主要集中在缅甸，其次是越南和马来西亚。总的来说，MSA的海岸线的特点是人工生长迅速，但仍然具有高百分比的归化。在发展海洋经济并解决生态风险方面，海岸线的利用率和硬化的强度可能会增加。

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