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Monitoring long-term shoreline dynamics and human activities in the Hangzhou Bay,China,combining daytime and nighttime EO data

引用

Big Earth Data 2020年第3期4卷 242-264页

作者： Lixia Chu Francis Oloo Martin Sudmanns Dirk Tiede Daniel Hölbling Thomas Blaschke Iulian Teleoacac aInterfaculty Department of Geoinformatics Z_GISUniversity of SalzburgSalzburgAustria Hydrology and Earth Observation Lab The Technical University of KenyaNairobiKenya Department of Geography West University of TimişoaraTimişoaraRomania

shorelines are vulnerable to anthropogenic activities including urbanization,land reclamation and sediment *** changes may be a reflection of the degradation of coastal ecosystems because of human *** the shoreline dynamics is,therefore,a topic of global *** observation data,such as multi-temporal satellite images,are an important resource for assessing changes in coastal *** this research,we used Google Earth Engine(GEE)to monitor and map historical shoreline dynamics in the Hangzhou Bay in China where the Qiantang River flows into the East China ***,we aimed to capture and quantify both the spatial and temporal shoreline changes and to assess the link between anthropogenic activities and shoreline changes on the integrity of this coastal *** implemented a Tasselled Cap analysis(TCA)on Landsat imagery from 1985 to 2018 in GEE to calculate the wetness *** then applied Otsu method for automatic image thresholding on the wetness coefficient to detect waterbodies and shoreline ***,we adopted the nighttime light data from the Defense Meteorological Satellite Program’s Operational Linescan System(DMSP-OLS)from 1992 to 2013 as a proxy of human *** results show that in the hotspot areas,the shoreline has moved by more than 5 km in the last decades,accounting for approximately 900 km^(2) of land *** this area,the human activity,indicated by the intensity of nighttime light,increased *** results of this work reveal the influence of human activities on the shoreline dynamics and can support policies that promote the sustainable use and conservation of coastal *** methodology can be transferred and applied to other coastal zones in various regions and scaled up to larger areas.

关键词： shorelines dynamics human activities Google Earth Engine Earth observation

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