太空载有多光谱图像的能力,用于检测光学复杂的沿海水域的变色
Logesh Natarajan1, Manigandan Vajravelu1, Muthukumar Chandrasekaran1
1National Centre for Coastal Research (NCCR), Ministry of Earth Sciences, NIOT Campus, Velachery-Tambaram Road, Pallikaranai, Tamil Nadu 600100, India.
Marine pollution bulletin
|August 19, 2024
概括
在普杜切里 (Puducherry) 的沿海污染监测显示,红棕色的水变色是由于悬浮物质而不是有害的藻类繁殖. 卫星数据和现场分析证实对海洋生物没有不利影响.
科学领域:
- 海洋污染 海洋污染
- 遥感是一种远程传感.
- 沿海生态系统的生态系统
背景情况:
- 沿海地区面临着藻类繁殖,污水和工业排放等污染物带来的风险.
- 印度普杜切里的散步海最近出现了不寻常的红棕色水变色.
- 区分藻类繁殖和其他污染物对于有效管理至关重要.
研究的目的:
- 监测Promenade海沿海水变色的空间范围和特征.
- 区分藻类繁殖和悬浮物质作为变色的原因.
- 评估变色对海洋生态系统的影响.
主要方法:
- 利用了从2023年9月到11月的Sentinel-2卫星图像.
- 进行了现场观测和实验室分析.
- 测量了叶绿素-a (Chl-a),总悬浮物质 (TSM) 和规范差异叶绿素指数 (NDCI).
主要成果:
- 卫星数据显示了大量的水变色.
- 高TSM度 (>45g/m3) 和负NDCI值表明没有藻类繁殖.
- 没有观察到水生生物的死亡率,这表明没有有害影响.
结论:
- 红棕色变色的原因是总悬浮物质度高.
- 卫星遥感与现场数据相结合,对于沿海污染监测是有效的.
- 这种综合方法对于保护海洋生态系统免受污染至关重要.
关键词:
沿海污染 沿海污染变色 变色 变色 变色在NDCI中,NDCI是NDCI.普杜切里 普杜切里遥感反射率 (Rrs) 是指遥感反射率 (Rrs) 是指遥感反射率 (Rrs) 是指遥感反射率 (Rrs) 是指遥感反射率.在TSM TSM中使用.更多相关视频
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