使用遥感技术绘制和监测红树林地图,以实现气候变化适应力
Reshma Sunkur1, Komali Kantamaneni2,3, Chandradeo Bokhoree1
1University of Technology Mauritius, Port Louis, Mauritius.
Scientific reports
|March 24, 2024
概括
红树林生态系统提供了重要的服务,但面临着威胁. 这项研究使用遥感和地理信息系统绘制了毛里求斯的红树林变化图,揭示了勒莫恩的显著增加,这对沿海弹性至关重要.
科学领域:
- 生态与自然保护学
- 遥感和地理空间分析
- 适应气候变化 适应气候变化
背景情况:
- 红树林是重要的沿海生态系统,提供显著的生态和经济效益.
- 岛屿国家特别容易受到气候变化的影响,红树林在性方面发挥着关键作用.
- 人类造成的压力对红树林的健康和全球范围构成严重威胁.
研究的目的:
- 用遥感和GIS评估毛里求斯的空间红树林覆盖面变化.
- 在选定的地点 (Le Morne和Ferney) 监测十年的红树林动态.
- 展示地理空间工具对于有效的红树林监测和保护规划的有用性.
主要方法:
- 获取和处理可免费使用的SPOT-5 (2013) 和Sentinel 2A (2023) 卫星图像.
- 集成谷歌地球Pro历史图像和地面验证,以准确地绘制红树林地图.
- 使用植被指数,GLCM,PCA和随机树算法进行图像分类和变化检测.
主要成果:
- 对所有映射图像实现了高分类准确性 (90年代的卡帕值).
- 在过去十年中,在Le Morne观察到红树林覆盖面的显著增加,主要是从泥原到红树林.
- 对于研究地点,产生了关于红树林覆盖面变化的空间显式数据.
结论:
- 地理空间工具对于监测红树林生态系统是不可或缺的,提供关键的时间敏感信息.
- 调查结果强调了有针对性的保护工作的重要性,以提高沿海地区的弹性.
- 产生的数据可以为决策者和利益相关者提供信息,帮助他们制定有效的气候变化适应战略.
相关概念视频
Responses to Drought and Flooding
10.7K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.7K
Adaptations that Reduce Water Loss
25.6K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.6K
Applications of GIS: Disaster Management and Emergency Response
77
Geographic Information System (GIS) technology is essential for risk identification, action prioritization, and resource optimization in critical situations like flooding and earthquakes. By integrating spatial and demographic data, GIS provides a comprehensive framework for emergency response.GIS integrates data layers, like rainfall intensity, topography, elevation profiles, and river levels, to model high-risk flood zones. These layers assess areas susceptible to flooding based on their...
77
Global Climate Change
24.3K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.3K
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
46
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
46
Levels of Use of a GIS
50
Geographic Information Systems (GIS) operate across three levels of application, each representing an increasing degree of complexity: data management, analysis, and prediction. These levels reflect the expanding functionality and versatility of GIS technology in handling spatial data for diverse purposes.Data ManagementAt its foundational level, GIS serves as a tool for data management, enabling the input, storage, retrieval, and organization of spatial data. This level is often employed in...
50


