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Title Transcription
シマントガワ ノ エンスイ ソジョウ
Title Alternative (English)
Salt water intrusion into the Shimanto River
File
language
jpn
Author
Inouchi, Yoshio
Inoue, Takahiko
Nakahara, Tomoaki
Tokuoka, Takao
Fukita, Ayumi
Description
Salt water intrusion into the Shimanto River was measured on June 16 and 17, and December 12 and 13, 2004 at spring tide, using a SC-3 acoustic profiling system which determines the spatial distribution of the halocline with the measurements of water quality (temperature, salinity and chlorophyle a). This system is an improved 200 kHz precision echosounder, that records the distribution of the halocline and the thickness of the salt-water layer as profile records. At the Shimanto River saline intrusion has been known to reach up to 9.8 km from the river mouth, and is known to reach in less than 8 km in the present days owing to the deposition of sandy sediments along the downstream area. Our observation has clarified that the saline wedge usually remains at the deep of 5.6 km, and that it exceeds sometimes upstream up to 7.5 km during flood tide. The behavior of the salt wedge at the moderately mixed rivers are clearly visualized by the present study.
Subject
Shimanto River
salt intrusion
saline wedge
echo-sounding survey
Journal Title
Laguna : 汽水域研究
Volume
13
Start Page
63
End Page
77
ISSN
21852995
Published Date
2006-06
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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