Published Papers - EGUSA Nobuyuki

土地利用特性の河川水質に及ぼす影響 -大阪府石川流域-

平田健正, 井伊博行, 長谷部正彦, 江種伸之, 坂本康, 粂川高徳, 酒井信行, 岩崎宏和

土木学会論文集   ( 614/II-46 )   1999  [Refereed]

地下水中に注入された空気の移動特性および汚染物質の濃度変化について

江種伸之, 平田健正, 福浦清, 松下孝 （Part： Lead author,　Corresponding author )

水工学論文集   42   349 - 354   1998  [Refereed]

A STUDY ON INVESTIGATION OF WATER CYCLE PROCESS IN THE ISHIKAWA RIVER

HASEBE Masahiko, HIRATA Takemasa, II Hiroyuki, SAKAMOTO Yasusi, EGUSA Nobuyuki, KUMEKAWA Takaniri, NISHIYAMA Kouji, SAITOU Nobuhiko, NAMATAME Norikazu

PROCEEDINGS OF HYDRAULIC ENGINEERING ( Japan Society of Civil Engineers )  42   307 - 312   1998  [Refereed]

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It is important that it makes clear cyclic process of water and water balance in urban river. But, the process of water cycle and water balance have not been made clear in the hydrologic system, because many factors are each other influenced complicatedly and that it is not elucidated in real basin.<BR>In this study, we attempt to clarity the process of water cycle in a watershed of the Ishikawa river with a discharge area of 220 km<SUP>2</SUP> by environmental isotope tracers. Both geochemical data which are EC, δ<SUP>18</SUP> O etc. and river discharge are directly measured at many points.<BR>As result, it is obvious that cyclic process of river water and water balance are grasped through geochemical data and field observation from macroscopic point.

DOI

Cost efficiency of subsurface remediation using soil vapor extraction and groundwater extraction

T. Hirata, N. Egusa, O. Nakasugi, S. Ishizaka, M. Murakami

Water Science and Technology ( Elsevier Sci Ltd )  37 ( 8 ) 161 - 168   1998  [Refereed]

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The groundwater pollution due to volatile organochlorines like trichloroethylene and tetrachloroethylene has been a great environmental issue in Japan. The nation wide survey revealed on the basis of up to fifty-nine thousand samples collected until 1995 that 1.5% for trichloroethylene and 2.3% for tetrachloroethylene cannot meet the drinking water standard. In order to repair subsurface pollution and to establish the integrated procedure for cost-benefit remediation measure, physical remediation technologies of soil vapor extraction and groundwater extraction were applied to a study site contaminated with trichloroethylene. The results showed that the trichloroethylene amounts of 472 kg by soil vapor extraction and 1764 kg by groundwater extraction were removed during three-year operation. In addition experience with both technologies has demonstrated that the soil vapor extraction has been successful in removing 1 kg hr-1 of trichloroethylene at the initial stage of remediation, which shows one order as high as the groundwater extraction. However, the removal rate due to soil vapor extraction declines much earlier than groundwater extraction, and consequently the removal rates of both technologies develop inversely with the progress of remediation. Such remediation behavior of technologies raised the relative cost for soil vapor extraction 15 times as high as groundwater extraction.

DOI

地下水中へ注入された空気による水質回復の影響について

江種伸之, 平田健正, 福浦清, 松下孝 （Part： Lead author,　Corresponding author )

地下水学会誌   40 ( 4 ) 417 - 428   1998  [Refereed]

降雨浸透の影響を考慮した不飽和土壌中における有機塩素化合物の鉛直輸送特性について

江種伸之, 平田健正, 唐常源 （Part： Lead author,　Corresponding author )

水工学論文集   41   569 - 574   1997  [Refereed]

Numerical simulation for transport of chlorinated hydrocarbons with gas advection and diffusion in unsaturated zone

N.Egusa, K.Jinno （Part： Lead author )

Journal of Hydroscience and Hydraulic Engineering   14 ( 2 ) 97 - 104   1996  [Refereed]

土壌ガス吸引と地下水揚水を併用した地下環境汚染の修復

平田健正, 江種伸之, 中杉修身, 石坂信也

環境工学研究論文集   33   47 - 55   1996  [Refereed]

不飽和土壌中でのガス流動を考慮した有機塩素化合物の輸送特性解析

江種伸之, 神野健二 （Part： Lead author )

水工学論文集   39   349 - 354   1995  [Refereed]

土壌ガス吸引時における有機塩素化合物ガスの挙動について

江種伸之, 神野健二 （Part： Lead author )

地下水学会誌   37 ( 4 ) 245 - 254   1995  [Refereed]

ガス拡散を考慮した有機塩素化合物の不飽和-飽和領域における輸送特性解析

江種伸之, 神野健二, 鷲見栄一 （Part： Lead author )

土木学会論文集   ( 502/II-29 ) 167 - 176   1994  [Refereed]

A HYDROGEOLOGICAL STUDY OF GROUNDWATER POLLUTION BY TETRACHLOROETHYLENE

N EGUSA, K JINNO, K NAKAMUTA, H HIRONAKA, Y MATSUFUJI, T ISHIBASHI （Part： Lead author )

IAHS Red Book Series "TRACERS IN HYDROLOGY” ( INT ASSOC HYDROLOGICAL SCIENCES )  ( 215 ) 125 - 134   1993  [Refereed]

トリクロロエチレンの自然河床区間から地下水系への浸透特性について

江種伸之, 神野健二, 籾井和朗, 鷲見栄一 （Part： Lead author )

水工学論文集   36   391 - 396   1992  [Refereed]