纸质出版：2020-06-07
移动端阅览
As part of Dragon 4 project
the water extents of Wuchang and Shengjin lakes have been extracted from Sentinel-2 time series
using all exploitable images since the beginning of the acquisitions in 2015. The aim of the study is to assess the capability of the Sentinel-2 constellation and Landsat 8 over the Anhui region
especially the high temporal resolution. A total of 32 dates have been used and 10 Landsat 8 images (Libra) have been added to try to reduce the temporal gaps in the Sentinel-2 acquisitions caused by cloudy conditions. Extractions were done using a SERTIT-ICube automatized routine based on a supervised Maximum Likelihood Classification. These extractions allow to recreate the dynamic of the two lakes and show the drought and wet periods. During the 3 years interval
the surface peaks on July 2016 for both lakes. The lowest level appears at two different dates for each lake; on January 2018 for Wuchang
on February 2017 for Shengjin. Wuchang Lake surface area appears to be more variable than Shengjin Lake
with many local maximum and minimum between the end of 2017 and April 2018. In the case of Wuchang Lake
floating vegetation is a problem for automatic water surface area extraction. The lake is covered by vegetation during long periods of time and the water below can't be detected by automatic radiometric means. Nevertheless
Sentinel-2 stays a pertinent and powerful tool for hydrological monitoring of lakes confirming the expectation from the remote sensing wetland community before launch. The presence of NIR and SWIR bands induces a strong discrimination between water and other classes
and the systematic acquisitions create dense time series
making analysis more consistent. It makes possible to sensor events occurring over short periods of time. Thanks to this a link can be done between endangered bird species
such as the Siberian Crane and the Lesser White-Fronted Goose and periodically flooded areas. These midterm results illustrated the pertinence and powerful of multi-source optical satellite data for environmental analysis.
Akaike H. , 1998 . Information theory and an extension of the maximum likelihood principle . In: Selected Papers of Hirotugu Akaike . s.l .: Springer , pp. 199 - 213
Barter M . A . R. K., Cao L. , Chen L. I . W. E. I. & Lei, G. A. N. G., 2005 . Results of a survey for waterbirds in the lower Yangtze floodplain, China, in January-February 2004. Forktail, Volume 21, p. 1
Cao L. , Zhang Y. , Barter M . & Lei, G., 2010 . Anatidae in eastern China during the non-breeding season : geographical distributions and protection status. Biological Conservation, Volume 143 , pp. 650 - 659
Cheng , Y. Q. et al. , 2009 . Wintering Waterbird Survey at the Anhui Shengjin Lake National Nature Reserve, China 2008/9 . University of Science and Technology of China Press , Hefei
Drusch , M. et al. , 2012 . Sentinel-2: ESA's optical high-resolution mission for GMES operational services . Remote sensing of Environment , Volume 120 , pp. 25 - 36
Huber , C. et al. , 2013 . Synergy of VHR pleiades data and SWIR spectral bands for flood detection and impact assessment in urban areas: Case of Krymsk, Russian Federation, in July 2012 . s.l. , s .n., pp. 4538 - 4541
Jia , Q. et al. , 2017 . Combating aggressive macrophyte encroachment on a typical Yangtze River lake: lessons from a long-term remote sensing study of vegetation . Aquatic Ecology , Volume 51 , pp. 177 - 189
Pekel J.-F. , Cottam A. , Gorelick , Belward A. S.N. & , 2016 . High-resolution mapping of global surface water and its long-term changes . Nature , Volume 540, p. 418
Xu H. , 2006 . Modification of normalised difference water index (NDWI) to enhance open water features in remotely sensed imagery . International journal of remote sensing , Volume 27 , pp. 3025 - 3033
Yesou , H. et al. , 2016 . Synergy of Sentinel-1 and Sentinel-2 imagery for wetland monitoring information extraction from continuous flow of sentinel images applied to water bodies and vegetation mapping and monitoring . s.l., s.n. , pp. 162 - 165
Yuan , Y. et al. , 2017 . The 2016 summer floods in China and associated physical mechanisms: A comparison with 1998 . Journal of Meteorological Research , Volume 31 , pp. 261 - 277
Zhang , X. et al. , 2016 . The overgrowth of Zizania latifolia in a subtropical floodplain lake: changes in its distribution and possible water level control measures . Ecological Engineering , Volume 89 , pp. 114 - 120
Zhang , Y. et al. , 2011 . Changing distribution and abundance of Swan Goose Anser cygnoides in the Yangtze River floodplain: the likely loss of a very important wintering site . Bird Conservation International , Volume 21 , pp. 36 - 48
相关文章
相关作者
相关机构
京公网安备11010802024621
