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Changes in turbidity and human activities along Haihe River Basin during lockdown of COVID-19 using satellite data
During the outbreak of the COVID-19, China implemented an urban lockdown in the first period. These measures not only effectively curbed the spread of the virus but also brought a positive impact on the ecological environment. The water quality of urban inland river has a significant impact on urban...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8363492/ https://www.ncbi.nlm.nih.gov/pubmed/34389962 http://dx.doi.org/10.1007/s11356-021-15928-6 |
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author | Chen, Xu Chen, Wei Bai, Yanbing Wen, Xiaole |
author_facet | Chen, Xu Chen, Wei Bai, Yanbing Wen, Xiaole |
author_sort | Chen, Xu |
collection | PubMed |
description | During the outbreak of the COVID-19, China implemented an urban lockdown in the first period. These measures not only effectively curbed the spread of the virus but also brought a positive impact on the ecological environment. The water quality of urban inland river has a significant impact on urban ecology and public health. This study uses Sentinel-2 visible and near-infrared band reflectance and the Normalized Difference Turbidity Index (NDTI) to analyze the water quality of the Haihe River Basin during the control period of COVID-19. It is found that during the lockdown period, the river water quality was significantly improved compared to the same period in 2019. The average NDTI of the Haihe River Basin in March decreased by 0.27, a decrease of 219.06%; in April, it increased by 0.07, that is 38.38%. Further exploration using VIIRS lights found that the brightness of the lights in the main urban area was significantly lower in February, the beginning of the lockdown. However, as the city was unblocked, the lights rose sharply in March and then recovered to normal. There is obvious asynchrony in changes between river turbidity and light. The results can help understand the impact of human activities on the natural environment. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s11356-021-15928-6. |
format | Online Article Text |
id | pubmed-8363492 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-83634922021-08-15 Changes in turbidity and human activities along Haihe River Basin during lockdown of COVID-19 using satellite data Chen, Xu Chen, Wei Bai, Yanbing Wen, Xiaole Environ Sci Pollut Res Int Research Article During the outbreak of the COVID-19, China implemented an urban lockdown in the first period. These measures not only effectively curbed the spread of the virus but also brought a positive impact on the ecological environment. The water quality of urban inland river has a significant impact on urban ecology and public health. This study uses Sentinel-2 visible and near-infrared band reflectance and the Normalized Difference Turbidity Index (NDTI) to analyze the water quality of the Haihe River Basin during the control period of COVID-19. It is found that during the lockdown period, the river water quality was significantly improved compared to the same period in 2019. The average NDTI of the Haihe River Basin in March decreased by 0.27, a decrease of 219.06%; in April, it increased by 0.07, that is 38.38%. Further exploration using VIIRS lights found that the brightness of the lights in the main urban area was significantly lower in February, the beginning of the lockdown. However, as the city was unblocked, the lights rose sharply in March and then recovered to normal. There is obvious asynchrony in changes between river turbidity and light. The results can help understand the impact of human activities on the natural environment. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s11356-021-15928-6. Springer Berlin Heidelberg 2021-08-14 2022 /pmc/articles/PMC8363492/ /pubmed/34389962 http://dx.doi.org/10.1007/s11356-021-15928-6 Text en © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2021 This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic. |
spellingShingle | Research Article Chen, Xu Chen, Wei Bai, Yanbing Wen, Xiaole Changes in turbidity and human activities along Haihe River Basin during lockdown of COVID-19 using satellite data |
title | Changes in turbidity and human activities along Haihe River Basin during lockdown of COVID-19 using satellite data |
title_full | Changes in turbidity and human activities along Haihe River Basin during lockdown of COVID-19 using satellite data |
title_fullStr | Changes in turbidity and human activities along Haihe River Basin during lockdown of COVID-19 using satellite data |
title_full_unstemmed | Changes in turbidity and human activities along Haihe River Basin during lockdown of COVID-19 using satellite data |
title_short | Changes in turbidity and human activities along Haihe River Basin during lockdown of COVID-19 using satellite data |
title_sort | changes in turbidity and human activities along haihe river basin during lockdown of covid-19 using satellite data |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8363492/ https://www.ncbi.nlm.nih.gov/pubmed/34389962 http://dx.doi.org/10.1007/s11356-021-15928-6 |
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