在过去五十年里,在Muriganga河上研究了海岸线迁移和岛屿动态,使用多时空卫星图像
Md Saddam Hossain1, Ujjwal Saha2
1Civil Engineering Department, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, 711103, India. mdsad00728@gmail.com.
Environmental monitoring and assessment
|January 24, 2024
概括
穆里甘加河的形态变化显示,侵蚀率高于积累率. 萨加尔和戈拉马拉等岛屿正在缩小,而尼奥吉和巴西特岛屿正在扩大,需要改善沿海管理.
科学领域:
- 地球和行星科学 地球和行星科学
- 环境科学 环境科学
- 地质科学 地质科学
背景情况:
- 穆里甘加河是一条浮动和潮的河流,经常经历形态变化.
- 岛屿动态和海岸线变化是沿海地形学的关键方面.
研究的目的:
- 分析49年来穆里甘加河及其相关岛屿的形态变化.
- 研究由侵蚀和积累过程驱动的海岸线移动和岛屿动态.
主要方法:
- 利用遥感和地理信息系统 (GIS) 进行分析.
- 使用数字海岸线分析系统 (DSAS 5.0) 来计算海岸线变化.
- 从1972年到2021年分析了Landsat卫星图像 (MSS,TM,OLI) 的使用情况.
主要成果:
- 短期和长期分析表明,穆里冈加河的平均侵蚀率高于积率.
- 萨加尔岛,戈拉马拉岛,莫苏尼岛和普什帕岛的面积持续缩小.
- 尼奥吉和巴西特岛屿表现出显著的扩张,可能是由于河流侵蚀的沉积物沉积.
结论:
- 海岸线侵蚀有助于河流的扩大,侵蚀物质积聚在不断扩大的岛屿上.
- 迫切需要有效的沿海管理策略来控制侵蚀.
- 这项研究为维护穆里冈加河的航行能力提供了见解.
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