Japan Geoscience Union Meeting 2016

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Poster

Symbol H (Human Geosciences) » H-TT Technology & Techniques

[H-TT23] Environmental Remote Sensing

Mon. May 23, 2016 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Teppei Ishiuchi(National Institute of Technology, Akashi College), Hiroto Shimazaki(National Institute of Technology, Kisarazu College), Akihiko Kondoh(Center for Environmental Remote Sensing, Chiba University), Yuji Sakuno(Institute of Engineering, Hiroshima University), Hitoshi Hasegawa(Dep.Geography Kokushikan Univ.), Yuji Kuwahara(Center for Water Environment Studies, Ibaraki University)

5:15 PM - 6:30 PM

[HTT23-P01] Development of automatic aquatic macrophytes mapping system in Lake Shinji using Landsat-8 data

*Yuji Sakuno1 (1.Hiroshima University)

Keywords:lake, monitoring, satellite

There is a serious problem for aquatic macrophytes expansion in the coastal region at Lake Shinji which is located in the Shimane-Prefecture after 2009. Grasp of the aquatic macrophytes distribution immediately by remote sensing is expected. Therefore the automatic calculation and mapping of aquatic macrophytes using Landsat-8/OLI data (32 scenes from April in 2013 to Nov. in 2015) with sensitive (12bit) and the high spatial resolution (30m) launched in February, 2013 was developed by this research. At first, the NDVI using a method by Sakuno et al. (2013) for the aquatic macrophytes extraction was calculated. The threshold value of NDVI to separate an aquatic macrophytes and non- aquatic macrophytes was set as 0. A median filter was used to eliminate noise of satellite images. Finally, the automatic mapping system was developed via NDVI from OLI data. The characteristic of aquatic macrophytes disributes in high density in the central southern part of Lake Shinji form September to November in particular.