2026-03-14T04:50:37Z https://hiroshima.repo.nii.ac.jp/oai

oai:hiroshima.repo.nii.ac.jp:02010248 2025-02-22T07:23:29Z 1730444907710

流動発生による富栄養化した貯水池の水温躍層の破壊実験 Field experiment on flow-induced destruction of thermocline in a eutrophic reservoir 野々村, 敦子 Nonomura, Atsuko 野々村 Nonomura 敦子 Atsuko 森本, 茂昭 Morimoto, Shigeaki 森本 Morimoto 茂昭 Shigeaki 河原, 能久 Kawahara, Yoshihisa 河原 Kawahara 能久 Yoshihisa 野間, 京二 Noma, Kyouji 野間 Noma 京二 Kyouji open access eutrophication water quality jet generator destratification reservoir dissolved oxygen 510 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. 土木学会 2005-02 jpn journal article AO https://hiroshima.repo.nii.ac.jp/records/2010248 0916-7374 AN10426673 水工学論文集 水工学論文集 49 1147 1147 1152 https://hiroshima.repo.nii.ac.jp/record/2010248/files/suikogaku_49_1147.pdf 485.1 KB