气候变化领域集成服务门户(CCPortal): Chlorophyll-a unveiled: unlocking reservoir insights through remote sensing in a subtropical reservoir

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DOI	10.1007/s10661-024-12554-w
	Chlorophyll-a unveiled: unlocking reservoir insights through remote sensing in a subtropical reservoir
	Mpakairi, Kudzai S.; Muthivhi, Faith F.; Dondofema, Farai; Munyai, Linton F.; Dalu, Tatenda
发表日期	2024
ISSN	0167-6369
EISSN	1573-2959
起始页码	196
结束页码	4
卷号	196 期号:4
英文摘要	Effective water resources management and monitoring are essential amid increasing challenges posed by population growth, industrialization, urbanization, and climate change. Earth observation techniques offer promising opportunities to enhance water resources management and support informed decision-making. This study utilizes Landsat-8 OLI and Sentinel-2 MSI satellite data to estimate chlorophyl-a (chl-a) concentrations in the Nandoni reservoir, Thohoyandou, South Africa. The study estimated chl-a concentrations using random forest models with spectral bands only, spectral indices only (blue difference absorption (BDA), fluorescence line height in the violet region (FLH_violet), and normalized difference chlorophyll index (NDCI)), and combined spectral bands and spectral indices. The results showed that the models using spectral bands from both Landsat-8 OLI and Sentinel-2 MSI performed comparably. The model using Sentinel-2 MSI had a higher accuracy of estimating chl-a when spectral bands alone were used. Sentinel-2 MSI's additional red-edge spectral bands provided a notable advantage in capturing subtle variations in chl-a concentrations. Lastly, the -chl-a concentration was higher at the edges of the Nandoni reservoir and closer to the reservoir wall. The findings of this study are crucial for improving the management of water reservoirs, enabling proactive decision-making, and supporting sustainable water resource management practices. Ultimately, this research contributes to the broader understanding of the application of earth observation techniques for water resources management, providing valuable information for policymakers and water authorities.
英文关键词	Water resource management; Chlorophyll-a; Nandoni Reservoir; Water quality; Spectral bands; Spectral indices
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001195496600001
来源期刊	ENVIRONMENTAL MONITORING AND ASSESSMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/297919
作者单位	University of the Western Cape; University of Venda; National Research Foundation - South Africa; South African Institute for Aquatic Biodiversity; Stellenbosch University
推荐引用方式 GB/T 7714	Mpakairi, Kudzai S.,Muthivhi, Faith F.,Dondofema, Farai,et al. Chlorophyll-a unveiled: unlocking reservoir insights through remote sensing in a subtropical reservoir[J],2024,196(4).
APA	Mpakairi, Kudzai S.,Muthivhi, Faith F.,Dondofema, Farai,Munyai, Linton F.,&Dalu, Tatenda.(2024).Chlorophyll-a unveiled: unlocking reservoir insights through remote sensing in a subtropical reservoir.ENVIRONMENTAL MONITORING AND ASSESSMENT,196(4).
MLA	Mpakairi, Kudzai S.,et al."Chlorophyll-a unveiled: unlocking reservoir insights through remote sensing in a subtropical reservoir".ENVIRONMENTAL MONITORING AND ASSESSMENT 196.4(2024).