Integrated monitoring of lakes’ turbidity in Wuhan, China during the COVID-19 epidemic using multi-sensor satellite observations
- 31 December 2020
- journal article
- research article
- Published by Taylor & Francis Ltd in International Journal of Digital Earth
- Vol. 14 (4), 443-463
- https://doi.org/10.1080/17538947.2020.1868584
Abstract
During the COVID-19 epidemic in Wuhan, China, a series of measures were implemented by the government to prevent the spread of disease, including the lockdown policy and construction of emergency hospitals. To estimate the impact of these measures on aquatic environments, turbidity of lakes in Wuhan was dynamically monitored by integrating multi-sensor satellite observations. Calibrated against field measurements, empirical turbidity models were developed with high accuracy (R 2 = 0.77, RMSE = 3.13 NTU). Time series of lake turbidity during COVID-19 were then retrieved, and possible factors for the turbidity change were discussed, including meteorological conditions and human activities. Results demonstrated that (1) the mean turbidity showed a 24.9% decline from 33.4 NTU to 25.1 NTU after the lockdown in Wuhan, which dropped 16.0% compared to that in the previous year. This decline might be related to the sharp reduction in human activities after the lockdown; (2) no obvious turbidity disturbance was observed in the lakes around emergency hospitals during their construction, and the lakes remained stable after the operation of hospitals. The method of integrating multi-sensor satellite observations used in this study shows great performance in term of temporal resolution for dynamic monitoring of inland water.Keywords
Funding Information
- National Key R&D Program of China (2018YFB0504900, 2018YFB0504904 and 2016YFC0200900, 2016YFC1400906)
- National Natural Science Foundation of China (42071325, 41701379 and 41571344)
- Wuhan University Luojia Talented Young Scholar Project (32442)
- ‘985 Project’ of Wuhan University
- Special funds of State Key Laboratory for equipmentNational Key Research and Development Program of China
This publication has 58 references indexed in Scilit:
- Investigation and Evaluation of Water Quality of the East Lake, WuhanAdvanced Materials Research, 2012
- AERONET-OC: A Network for the Validation of Ocean Color Primary ProductsJournal of Atmospheric and Oceanic Technology, 2009
- Monitoring freshwater, estuarine and near-shore benthic ecosystems with multi-sensor remote sensing: An introduction to the special issueRemote Sensing of Environment, 2008
- Monitoring turbidity in Tampa Bay using MODIS/Aqua 250-m imageryRemote Sensing of Environment, 2007
- Reactivity, interactions and transport of trace elements, organic carbon and particulate material in a mountain range river system (Adour River, France)Journal of Environmental Monitoring, 2007
- Assessment of estuarine water-quality indicators using MODIS medium-resolution bands: Initial results from Tampa Bay, FLRemote Sensing of Environment, 2004
- Dynamics of mercury species in surface sediments of a macrotidal estuarine–coastal system (Adour River, Bay of Biscay)Estuarine, Coastal and Shelf Science, 2004
- TURBIDITY SUSPENI)ED SEDIMENT, AND WATER CLARITY: A REVIEW1Jawra Journal of the American Water Resources Association, 2001
- Atmospheric Correction of SeaWiFS Imagery over Turbid Coastal Waters: A Practical MethodRemote Sensing of Environment, 2000
- Dynamic behavior of suspended sediment concentrations in a shallow lake perturbed by episodic wind eventsLimnology and Oceanography, 1990