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ID 16606
file
title alternative
Field experiment on flow-induced destruction of thermocline in a eutrophic reservoir
creator
Nonomura, Atsuko
Morimoto, Shigeaki
Noma, Kyouji
subject
eutrophication
water quality
jet generator
destratification
reservoir
dissolved oxygen
NDC
Construction. Civil engineering
abstract
Oxygen levels in eutrophic water bodies can become rapidly depleted at the presence of stable thermal stratification. The anoxic condition induces the release of nutrients and heavy metals from bottom sediments, leading to water quality problems. In Goten reservoir, we installed two sets of jet flow generator. One jet flow generator transports the water near free surface and eject it near the bottom while the other discharges pumped groundwater near the bottom. Field measurement has been carried out to understand the destratification process by the induced flow and the resultant changes in water quality. It is demonstrated that the jet flow generators accelerate the destratification process considerably and that the spatial distribution of water quality in a horizontal plane shows little difference during the process. It is also found that further improvement with the jet flow generators is necessary to increase more effectively the dissolved oxygen concentration near the bottom.
journal title
水工学論文集
volume
Volume 49
start page
1147
end page
1152
date of issued
2005-02
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