Acta Geodaetica et Cartographica Sinica ›› 2020, Vol. 49 ›› Issue (6): 671-680.doi: 10.11947/j.AGCS.2020.20200080

• Cartography and Geoinformation •     Next Articles

COVID-19 risk assessment driven by urban spatiotemporal big data: a case study of Guangdong-Hong Kong-Macao Greater Bay Area

XIA Jizhe1,2,3, ZHOU Ying4, LI Zhen1,3, LI Fan3,5, YUE Yang1,2,3, CHENG Tao6, LI Qingquan1,2,3,7   

  1. 1. Department of Urban Informatics, School of Architecture and Urban Planning,Shenzhen University, Shenzhen 518060, China;
    2. Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen 518060, China;
    3. Guangdong Key Laboratory for Urban Informatics, Shenzhen University, Shenzhen 518060, China;
    4. College of public health, Shenzhen University, Shenzhen 518060, China;
    5. College of Computer Science and Software Engineering, Shenzhen University, Shenzhen 518060, China;
    6. Department of Civil, Environmental and Geomatic Engineering, University College London, London WC1E6BT, UK;
    7. State Key Laboratory of Information Engineering in Surveying, Mapping, and Remote Sensing, Wuhan University, Wuhan 430079, China
  • Received:2020-03-05 Revised:2020-04-09 Online:2020-06-20 Published:2020-06-28
  • Supported by:
    The National Key Research and Development Program of China (No. 2018YFB2100704);The National Natural Science Foundation of China (Nos. 41701444;7181101150)

Abstract: The rapid spread of the novel coronavirus (COVID-19) from late 2019 to early 2020 poses a huge challenge to the public health of China and the world. The risk assessment of COVID-19 plays an essential role in the decision making of epidemic prevention. As one of the most important metropolitan areas in China, Guangdong-Hong Kong-Macao Greater Bay Area (GBA) is seriously affected by COVID-19. A massive number of returnees after the holidays further poses potential COVID-19 risks. Targeting on the urgent need of COVID-19 risk assessment in GBA, we combine multi-source urban spatiotemporal big data and traditional epidemiological model to design an improved model. Specifically, the improved model introduces dynamic “return-to-work” population and propagation hotspots to calibrate COVID-19 parameters in different assessment units and improve SEIR model suitability in GBA; targeting on the urgent needs of high resolution (e.g. community level) risk assessment, the model utilizes multi-source urban big data (e.g, mobile phone) to improve modelling spatial resolution from more detailed population and COVID-19 OD matrix. The simulation results show that: ① compared with the traditional SEIR model, the proposed model has better capability for risk assessment in GBA; ② the massive population flow in GBA introduces considerable COVID-19 risk in GBA; ③ a variety of epidemic prevention initiatives in China are highly effective for delaying the spread of COVID-19 in GBA.

Key words: COVID-19, Guangdong-Hong Kong-Macao Greater Bay Area, spatiotemporal big data, epidemiological model

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