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ID 16610
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title alternative
Field experiment on hypolimnic aeration using micro oxygen bubbles in a eutrophic reservoir
creator
Takeuchi, Yutaka
Nonomura, Atsuko
Matsuo, Katsumi
subject
micro-bubble aeration
eutrophication
hypolimnion
dissolved oxygen
thermal stratification
field experiment
NDC
Construction. Civil engineering
abstract
An in-situ experiment on hypolimnic aeration was carried out in Fuchu reservoir, which has been suffering from severe eutrophication, from mid-August to early December in 2004. Micro oxygen bubbles were injected into the anaerobic hypolimnion to improve water quality without disturbing the thermal stratification. Before the destratification due to big typhoons in the late September, some fundamental information was obtained which is useful in designing and maintaining an aeration system applied to eutrophic reservoirs. The operation of the micro-bubble aeration system increased the dissolved oxygen concentration to 1~3mg/L together with the decrease in electric conductivity, but within a limited area. This was explained by the very high consumption rate of dissolved oxygen in hypolimnic water and by bed materials. And the necessity was recognized to prevent the aerator nozzles from clogging accompanied by the oxidation of dissolved iron.
journal title
水工学論文集
volume
Volume 50
start page
1351
end page
1356
date of issued
2006-02
publisher
土木学会
issn
0916-7374
ncid
language
jpn
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
department
Graduate School of Engineering