NDLI: Survey of submerged aquatic vegetation with Multi-beam Echo Sounder in Towada Lake of Japan

Content Provider	IEEE Xplore Digital Library
Author	Abukawa, K. Asada, A. Yamamuro, M. Chunhui Xu Kikvidze, Z. Sugimoto, K.
Copyright Year	2011
Description	Author affiliation: Institute of Industrial Science, University of Tokyo, Japan (Asada, A.) \|\| Windy Network, Japan (Sugimoto, K.) \|\| University of Tokyo, Japan (Abukawa, K.; Yamamuro, M.; Chunhui Xu; Kikvidze, Z.)
Abstract	Submerged aquatic vegetation (SAV) is a potent water-purifying agent enhancing integrity of lake ecosystems. Therefore, mapping the distribution of SAV in lakes is very important for managing the water quality and serves to conservation purposes. Current method for mapping SAV, i.e. collecting plant samples from shore, is not applicable to mapping wide areas. Here we report the novel method for mapping and quantifying the volume of SAV based on the use of Multi-beam Echo Sounder. The new method was used in Towada Lake, northeast Japan during the summer of 2010. This method includes a Multi-beam Echo Sounder, the Antennas of RTK-GPS and Azimuth Measurement. SAV was scanned with Multi-beam Echo Sounder after taking pictures with an underwater camera and sampling with the plant body extraction device. Using vegetation echo data and lake bottom echo data, we calculated height, coverage, and volume of SAV and produced a distribution map of SAV. In Towada Lake SAV distributed at bottom depths from 2 to 20 m with an area of $1948m^{2}$ and volume of $1324m^{3}.$ The volume changed with the depths, being $393m^{3},$ $64m^{3},$ $424m^{3},$ $308m^{3}$ and $134m^{3}$ at 4–6m, 6–8m, 8–10m, 10–12m and 12–18m depths, respectively. Our study demonstrated that Multi-beam Echo Sounder is an effective tool for mapping and quantifying SAV distribution including its visualization in three dimensions.
Starting Page	1
Ending Page	6
File Size	620308
Page Count	6
File Format	PDF
ISBN	9781457701658
e-ISBN	9781457701641
DOI	10.1109/UT.2011.5774154
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-05
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lakes Vegetation mapping Cameras Antenna measurements Rocks Water Water conservation
Content Type	Text
Resource Type	Article

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