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jpn
Title Transcription
ナカウミ シュンセツ アトチ ニ シュウセキ シタ フデイ ノ トクセイ
Title Alternative
CHARACTERISTICS OF SUSPENDED SEDIMENTS IN DREDGED SITE OF BRACKISH LAKE NAKANOUMI
Author
AKIBA, M Fac. of Agric., Shimane Univ.
KITSUDA, T Fac. of Agric., Shimane Univ.
NODA, S Inst. of Indust. Sci. and Tech, Shimane
NAKAMURA, M Dept. of Exprri. Fishery, Shimane
MORI, T Fac. of Agric., Shimane Univ.
Description
Suspended sediment accumulation in dredged sites of brackish Lake Nakanoumi has caused problems such as the release of nutrients and the generation of hydrogen sulfide. It is of great importance to know the characteristics of the suspended sediments at the dredged sites in order to control these problems. The characteristics of the suspended sediments at the dredged sites are; water content, 700%; ignition loss, 22%; Eh, -170mV; and average grain size, 10μm. By comperison, the characteristics of the suspended sediments away from the dredged site are; water content. 350%; ignition loss, 16%; Eh, +20mV; and average grain size, 20μm. Several kinds of diatoms were found in the suspended sediments at the dredged sites, the dominant species being Skeletonema sp. which frequently appears in the “red tide” of Lake Nakanoumi. Many mineral particles (mainly quartz) were found in the suspended sediments away from the dedged sites.
From these results, it was found that the characteristics of the suspended sediments at dredge site were higher water content and ignition loss, lower Eh value, and smoller grain size, compared to the sediments outside the dredge sites.
Subject
Brackish lake
sediments
dredging
scanning electron microscope
water content
Journal Title
ENVIRONMENTAL ENGINEERING RESEARCH
Volume
30
Start Page
243
End Page
249
ISSN
1341-5115
ISSN(Online)
1884-829X
Published Date
1993
DOI
Publisher
社団法人 土木学会
Publisher Transcription
シャダン ホウジン ドボク ガッカイ
NII Type
Journal Article
OAI-PMH Set
Department of Environmental and Sustainability Sciences, Faculty of Life and Environmental Science
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