start-ver=1.4
cd-journal=joma
no-vol=29
cd-vols=
no-issue=1
article-no=
start-page=23
end-page=34
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1994
dt-pub=19941130
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Study on Water Quality of Surface Runoff and Groundwater Runoff on the Basis of Separation by a Numerical Filter
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=In this study we investigated the water quality of surface runoff and groundwater runoff from the basins of the Yodo River and the Asahi River based on that separated by a numerical filter. The water quality of the surface runoff is greatly different from the groundwater runoff. The tendency of concentration change in accordance with river discharges is different from each other. The water qtiality of groundwater runoff changes with river discharges clockwise in many cases. The differences of COD and SS originating from those of population and industrial activities in each basin are found in the lower SS concentrations of the surface runoff and the COD cencentrations of the groundwater runoff. The nutrients and chlorine ion were investigated, too.
en-copyright=
kn-copyright=

en-aut-name=KawaraOsami
en-aut-sei=Kawara
en-aut-mei=Osami
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=FukumotoKohji
kn-aut-sei=Fukumoto
kn-aut-mei=Kohji
aut-affil-num=2
ORCID=

affil-num=1
en-affil=
kn-affil=Department of Environmental and Civil Engineering, Faculty of Environmental Science and Technology

affil-num=2
en-affil=
kn-affil=Tottori Prefectural Office
END

start-ver=1.4
cd-journal=joma
no-vol=26
cd-vols=
no-issue=
article-no=
start-page=23
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2004
dt-pub=200411
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=岡山大学保健環境センター環境安全部門部門の発足
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=
en-copyright=
kn-copyright=

en-aut-name=KawaraOsami
en-aut-sei=Kawara
en-aut-mei=Osami
kn-aut-name=河原長美
kn-aut-sei=河原
kn-aut-mei=長美
aut-affil-num=1
ORCID=

affil-num=1
en-affil=
kn-affil=岡山大学保健環境センター
END

start-ver=1.4
cd-journal=joma
no-vol=25
cd-vols=
no-issue=
article-no=
start-page=1
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2003
dt-pub=200308
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=環境管理センターISO14001認証取得と全学的な環境管理システムの構築の必要性
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=
en-copyright=
kn-copyright=

en-aut-name=KawaraOsami
en-aut-sei=Kawara
en-aut-mei=Osami
kn-aut-name=河原長美
kn-aut-sei=河原
kn-aut-mei=長美
aut-affil-num=1
ORCID=

affil-num=1
en-affil=
kn-affil=岡山大学環境管理センター
END

start-ver=1.4
cd-journal=joma
no-vol=23
cd-vols=
no-issue=
article-no=
start-page=1
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2001
dt-pub=200108
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=環境問題に係る最近の住民運動と社会科学的な検討の必要性
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=
en-copyright=
kn-copyright=

en-aut-name=KawaraOsami
en-aut-sei=Kawara
en-aut-mei=Osami
kn-aut-name=河原長美
kn-aut-sei=河原
kn-aut-mei=長美
aut-affil-num=1
ORCID=

affil-num=1
en-affil=
kn-affil=岡山大学環境管理センター
END

start-ver=1.4
cd-journal=joma
no-vol=22
cd-vols=
no-issue=
article-no=
start-page=2
end-page=4
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2000
dt-pub=200009
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=大学における環境マネジメントの検討
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=
en-copyright=
kn-copyright=

en-aut-name=KawaraOsami
en-aut-sei=Kawara
en-aut-mei=Osami
kn-aut-name=河原長美
kn-aut-sei=河原
kn-aut-mei=長美
aut-affil-num=1
ORCID=

affil-num=1
en-affil=
kn-affil=岡山大学環境管理センター
END

start-ver=1.4
cd-journal=joma
no-vol=22
cd-vols=
no-issue=
article-no=
start-page=26
end-page=31
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2000
dt-pub=200009
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=Evaluation of genotoxic potential in sewage and treated effluent with the umu-test
kn-title=Umu試験による生活系排水の遺伝毒性評価
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The umu-test, which can detect genotoxic activites of a wide variety of environmental carcinogens and mutagenes, was carried out with samples from several sewage treatment processes. We applied the umu-test to raw sewage and treated effluent from two points of view, one is to evaluate a treatment process and the other is to identify the genotoxic substances. The original strain of umu-test, Salmonella typhimurium TA1535/pSK1002 can detect nonspecific genotoxicity, on the other hand, by using S. typhimurium NM2009 of the umu-test highly sensitive to aromatic amines, genotoxicity related to aromatic amines is measured. The result showed that genotoxic substances which have the polycyclic aromatic amino structures in the sewage remained after biological treatment. Tow-step HPLC fractionation followed by MS analysis to identify the genotoxic substances was applied to samples to detect mutagenic and carcinogenic heterocyclic amines. The concentration of Trp-P-1 and Trp-P-2 determined in the effluent caluculated from HPLC-UV analysis were on the order of 10(-5) mg/L. Because of the possibility of the reuse of wastewater in urban areas, the need for the investigation of the safety of the treated water from the sewage treatment plants was suggested, in order to evaluate strategies for advanced treatment, if necessary.
en-copyright=
kn-copyright=

en-aut-name=MohriShino
en-aut-sei=Mohri
en-aut-mei=Shino
kn-aut-name=毛利紫乃
kn-aut-sei=毛利
kn-aut-mei=紫乃
aut-affil-num=1
ORCID=

en-aut-name=OnoYoshiro
en-aut-sei=Ono
en-aut-mei=Yoshiro
kn-aut-name=小野芳朗
kn-aut-sei=小野
kn-aut-mei=芳朗
aut-affil-num=2
ORCID=

en-aut-name=KawaraOsami
en-aut-sei=Kawara
en-aut-mei=Osami
kn-aut-name=河原長美
kn-aut-sei=河原
kn-aut-mei=長美
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=岡山大学大学院自然科学研究科

affil-num=2
en-affil=
kn-affil=岡山大学環境理工学部環境デザイン工学科

affil-num=3
en-affil=
kn-affil=岡山大学環境理工学部環境デザイン工学科
END

start-ver=1.4
cd-journal=joma
no-vol=19
cd-vols=
no-issue=
article-no=
start-page=2
end-page=3
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1997
dt-pub=199707
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=都市の時代と地球環境問題
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=
en-copyright=
kn-copyright=

en-aut-name=KawaraOsami
en-aut-sei=Kawara
en-aut-mei=Osami
kn-aut-name=河原長美
kn-aut-sei=河原
kn-aut-mei=長美
aut-affil-num=1
ORCID=

affil-num=1
en-affil=
kn-affil=岡山大学環境理工学部
END

start-ver=1.4
cd-journal=joma
no-vol=12
cd-vols=
no-issue=1
article-no=
start-page=71
end-page=76
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2007
dt-pub=20070315
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=The effect of aeration and water intake on the water quality in the Asahi River Dam reservoir
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The Asahi River Dam reservoir is one of the important fresh water resources in Okayama, Japan, and its eutrophication has been noted since the 1980s. Therefore, aeration has been applied to control the growth of phytoplankton. In this study, we discussed the effect of aeration and  water-intake depth on the water quality distribution in the reservoir, based on numerical simulation and observation. The principal conclusions were as follows:(1) The numerical simulation models applied here reproduced observations fairly well. (2) Water intake from the surfacce layer reduced the concentration of chlorophyll a in the surface layers. Water intake from the middle or bottom layer improved the deficit of dissolved oxygen in the bottom layers. (3) Aeration together with water intake from the middle or bottom layer improved the deficit of dissolved oxygen in the bottom layers.
en-copyright=
kn-copyright=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=ChenW.
kn-aut-sei=Chen
kn-aut-mei=W.
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=YoshidaR.
kn-aut-sei=Yoshida
kn-aut-mei=R.
aut-affil-num=2
ORCID=

en-aut-name=KawaraOsami
en-aut-sei=Kawara
en-aut-mei=Osami
kn-aut-name=河原長美
kn-aut-sei=河原
kn-aut-mei=長美
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=岡山大学

affil-num=2
en-affil=
kn-affil=Nimi Branch Office of Okayama Prefecture

affil-num=3
en-affil=
kn-affil=岡山大学
en-keyword=the Asahi River Dam Reservoir
kn-keyword=the Asahi River Dam Reservoir
en-keyword=numerical simulation
kn-keyword=numerical simulation
en-keyword=eutrophication
kn-keyword=eutrophication
en-keyword=water intake depth
kn-keyword=water intake depth
en-keyword=dissolved oxygen
kn-keyword=dissolved oxygen
en-keyword=chlorophylla
kn-keyword=chlorophylla
END

start-ver=1.4
cd-journal=joma
no-vol=7
cd-vols=
no-issue=1
article-no=
start-page=45
end-page=53
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2002
dt-pub=20020322
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=A Study on Influence of Current Velocity on Phytoplankton
kn-title=流動が植物プランクトンに及ぼす影響に関する研究
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The main problems caused by eutrophication result from the increase of phytoplankton. Therefore, controlling the increase of phytoplankton is the most important. In this study, we discuss the influence of current velocity on the growth of phytoplankton based on the field experiments and laboratory experiments. The laboratory experiments for the influence of current velocity on the growth have been conducted using circular channels, and the field experiments were conducted using a shallow pond. The results of the experiments show current velocity inhibits the growth of phytoplankton.
en-copyright=
kn-copyright=

en-aut-name=LiJinsong
en-aut-sei=Li
en-aut-mei=Jinsong
kn-aut-name=季勁松
kn-aut-sei=季
kn-aut-mei=勁松
aut-affil-num=1
ORCID=

en-aut-name=KawaraOsami
en-aut-sei=Kawara
en-aut-mei=Osami
kn-aut-name=河原長美
kn-aut-sei=河原
kn-aut-mei=長美
aut-affil-num=2
ORCID=

en-aut-name=OnoYosiro
en-aut-sei=Ono
en-aut-mei=Yosiro
kn-aut-name=小野芳朗
kn-aut-sei=小野
kn-aut-mei=芳朗
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=岡山大学

affil-num=2
en-affil=
kn-affil=岡山大学

affil-num=3
en-affil=
kn-affil=岡山大学
en-keyword=Eutrophication
kn-keyword=Eutrophication
en-keyword=growth of phytoplankton
kn-keyword=growth of phytoplankton
en-keyword=influence of current velocity
kn-keyword=influence of current velocity
en-keyword=experiment
kn-keyword=experiment
END

start-ver=1.4
cd-journal=joma
no-vol=14
cd-vols=
no-issue=1
article-no=
start-page=139
end-page=150
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1979
dt-pub=19791201
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Ozonation of Organic Substances from View Points of Wastewater Treatment
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=In this paper, ozonation of organic substances which are found in wastewater is discussed regarding following respects; (1)removal ratios of COD(Cr) and TOC, (2)removal properties, and (3)oxidation products. The main results are summarized as follows. (l)Ozonation quickly removes proteins and amino acids, but mildly polysaccharides and n-saturated carboxylic acids. (2)The initial removal of COD(Cr) or TOC is quite rapid, but, as the reaction continues, it slows down so drasti-cally that one may suspect that it has completed. (3)Starch and albumine are decomposed to the smaller molecular compounds. (4)The COD(Cr) /TOC ratio of each substance which is chosen in this study decreases. This means that ozonation results in the formation of oxygenated fragments of the original molecule-occurs by bond fission or partial oxidation. (5)Proteins are indispensable components in frothing because they are surface active. They are removed by not only oxidation but also foaming, however, the removal by foaming is not so large.
en-copyright=
kn-copyright=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=KawaraOsami
kn-aut-sei=Kawara
kn-aut-mei=Osami
aut-affil-num=1
ORCID=

affil-num=1
en-affil=
kn-affil=Department of Civil Engineering
END

start-ver=1.4
cd-journal=joma
no-vol=26
cd-vols=
no-issue=1
article-no=
start-page=61
end-page=73
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1991
dt-pub=19911130
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=The Model of Water Quality Management for the Hino River
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Lake Biwa is the largest lake in Japan, and one of the most important fresh water resources. The Hino River is the fourth largest river among the rivers which flow into Lake Biwa. The eutrophication of the lake has been warned since the 1960s. In order to improve the water quality of the lake, to decrease the loads through rivers is inevitable. Therefore, it is needed to predict the effects of measures to control pollutant loads and the influence of development in the basin on the loads from rivers before developing the basin and taking measures. This paper deals mainly with the model of water quality management for the Hino River and the effects of the development in the basin on the water quality. The model was formulated considering loads from forests, rice paddy fields, households, housing land, industrial factories. Using this model, a calculation system by a microcomputer was developed and the influence of urbanization of the basin was discussed.
en-copyright=
kn-copyright=

en-aut-name=KawaraOsami
en-aut-sei=Kawara
en-aut-mei=Osami
kn-aut-name=河原長美
kn-aut-sei=河原
kn-aut-mei=長美
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=DannoHideki
kn-aut-sei=Danno
kn-aut-mei=Hideki
aut-affil-num=2
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=KunimatsuTakao
kn-aut-sei=Kunimatsu
kn-aut-mei=Takao
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=Department of Civil Engineering

affil-num=2
en-affil=
kn-affil=Tohre Engineering, Ltd.

affil-num=3
en-affil=
kn-affil=Faculty of Agriculture, Shiga Prefectural Junior College
END

start-ver=1.4
cd-journal=joma
no-vol=11
cd-vols=
no-issue=2
article-no=
start-page=37
end-page=49
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1977
dt-pub=19770125
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Ozone and Chlorine in Wastewater Disinfection
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=In this paper, we compare ozone with chlorine regarding following respects; (1)Disinfection efficiency (2)Oxidation power (3)Effects of secondary effluents treated by ozone or chlorine on aerobic microorganisms. Both ozone and chlorine are powerfull oxidizing agents. However,those are greatly different from each other in effects of treatment. Ozone is superior to chlorine in oxidation of organics, perfection of disinfection and effects on aerobic microorganisms. On the other hand, chlorine is superior in disinfection of Coliform group bacteria. Based on these results,it may be concluded that chlorination will be effective in disinfection of effluents which do not contain so much contaminants. However in case of rather highly cotaminated effluents, ozonation will be
suitable.
en-copyright=
kn-copyright=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=KawaraOsami
kn-aut-sei=Kawara
kn-aut-mei=Osami
aut-affil-num=1
ORCID=

affil-num=1
en-affil=
kn-affil=Department of Civil Engineering,School of Engineering Okayama University
END

start-ver=1.4
cd-journal=joma
no-vol=15
cd-vols=
no-issue=2
article-no=
start-page=147
end-page=164
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1981
dt-pub=19810330
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Hydraulics and Water Quality in Kojima Bay
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=In this paper, characteristics of hydraulics and water quality in Kojima Bay are discussed based on field observations. The main results obtained are as follows. (1) The variation of flow rate in Kojima Bay has periods for 30 minutes to 2 hours. This characteristic is represented by a two-dimensional numerical simulation fairly well. (2) The local distributions of salinity and suspended solids show increase in the direction to the mouth of Kojima Bay. On the other hand, the distribution of COD(Mn) is nearly uniform in the whole area of the bay. Salinity appears to be influenced by river discharge sensitively but suspended solids does not. (3) The vertical distributions of salinity and suspended solids are similar. There are similar points between the cross-sectional average of water quality and surface water quality. (4) The surface water quality seems to be influenced by the variation of velocity.
en-copyright=
kn-copyright=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=NagoHiroshi
kn-aut-sei=Nago
kn-aut-mei=Hiroshi
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=KawaraOsami
kn-aut-sei=Kawara
kn-aut-mei=Osami
aut-affil-num=2
ORCID=

affil-num=1
en-affil=
kn-affil=Department of Civil Engineering

affil-num=2
en-affil=
kn-affil=Department of Civil Engineering
END

start-ver=1.4
cd-journal=joma
no-vol=21
cd-vols=
no-issue=2
article-no=
start-page=9
end-page=19
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1987
dt-pub=19870305
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Influence of Sewage Treatment System on Water Quality in Kojima Lake
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=This study dealt with the characteristics of hydrodynamics of Kojima Lake and the influence of a regional sewage treatment system in construction on the lake. Clockwise and anticlockwise circulations are caused by seasonal winds in summer and winter, respectively. The distribution of a conservative material continuously discharged off the shore of the sewage treatment plant is scarcely affected by seasonal winds and river discharges. The sewage treatment system improves the water quality of the lake except T-N.
en-copyright=
kn-copyright=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=KawaraOsami
kn-aut-sei=Kawara
kn-aut-mei=Osami
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=NasuKiyotaka
kn-aut-sei=Nasu
kn-aut-mei=Kiyotaka
aut-affil-num=2
ORCID=

affil-num=1
en-affil=
kn-affil=Department of Civil Engineering

affil-num=2
en-affil=
kn-affil=Tokyo Construction Consultants co.,Ltd.
END