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Title Transcription
キスイ イキ チョウサ ノ タメ ノ ローコスト コンパクト ナ オンキョウ チョウサ キキ サイド スキャン ソーナー ノ システム カ
Title Alternative (English)
A low-cost, compact acoustic survey equipment system(sidescan sonar)for use in the coastal lagoons and estuaries
File
language
jpn
Author
Nishimura, Kiyokazu
Masato, Joshima
Tokuoka, Takao
Ueno, Hiroyoshi
Fukita, Ayumi
Tomoyoshi, Takeuchi
Description
When geological surveys or environmental studies are carried out in brackish water lakes like Lake Nakaumi and Lake Shinji, a sub-bottom profiler (SBP), which images the geological structure of the lake sediment, and sidescan sonar (SSS), which reveals the microtopography of the lake bottom, are essential survey equipment. However, conventional survey equipment was designed for marine operations, and as a result it is large and difficult to use in lakes. A low-cost and compact sidescan sonar and sub-bottom profiler system was developed which can be deployed from a small boat, and easily used in the survey of brackish water lakes. The trade name of the digital sidescan sonar is SportScan (Imagenex Technology Corp., Canada) and the trade name of the sub-bottom profiler is StrataBox (SyQwest Inc., USA). In this paper, we focus on the sidescan sonar. The low-cost sidescan sonar is composed of a towfish connected directly to a power supply (10-16 VDC) and notebook PC through the shipboard towing cable. The operating frequency of the sidescan sonar is 330 kHz, the available operating range is 15m-120m, and the best towing speed is 2-3 knots. A survey of Lake Nakaumi was carried out by combining sidescan sonar/sub-bottom profiler and a DGPS receiver with navigation based on the map software KASHMIR 3 D. This sidescan sonar survey produced a mosaic map of the sediment surface of Lake Nakaumi.
Subject
sidescan sonar
SportScan
GPS
KASHMIR 3 D
coastal lagoon
Journal Title
Laguna : 汽水域研究
Volume
11
Start Page
43
End Page
51
ISSN
21852995
Published Date
2004-06
NCID
AN10439529
Publisher
島根大学汽水域研究センター
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
OAI-PMH Set
Estuary Research Center
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