{"title":"On the Investigation of Ground-water Veins in the Minazuki Landslid by Underground Temperatur Survey at One Meter Depth","authors":"A. Takeuchi","doi":"10.5917/JAGH1959.20.161","DOIUrl":"https://doi.org/10.5917/JAGH1959.20.161","url":null,"abstract":"","PeriodicalId":422881,"journal":{"name":"THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132925438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Numerical Analysis of Salt-Water Intrusion in Coastal Aquifer by Weighted Residuals Method","authors":"S. Tohma","doi":"10.5917/JAGH1959.22.22","DOIUrl":"https://doi.org/10.5917/JAGH1959.22.22","url":null,"abstract":"A weighted residuals method based on Galerkin's finite element technique is applied to investigate the salt—water intrusion and dispersion in the coastal aquifer. The salt-water intrusion phenomenon was treated as the density-dependent flow of two immiscible and miscible fluids. <BR> The mathematical formulation of miscible density—dependent flow consists of the coupled form of the flow equation and the convective diffusion equation. <BR> The present analysis uses two dimensional quadrilateral, isoparametric elements with a linear basis function for piezometric head, salt concentration and velocity","PeriodicalId":422881,"journal":{"name":"THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115367718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Applicability of Equations expressing Free-Surface-Groundwater Profiles","authors":"O. Iida","doi":"10.5917/JAGH1959.19.48","DOIUrl":"https://doi.org/10.5917/JAGH1959.19.48","url":null,"abstract":"This paper describes the applicability of the set of equations exprssing free-surfacegroundwater profiles over an impermeable layer. <BR> The theoretical steady free-surface-groundwater profiles are given by equation (5), (6), (7) and (10). The unsteady state profile is given by the finite difference equation (17) which was derived from equation (3). The steps in equation (17) must satisfy condition (23). <BR> The theoretical equations for free-surface-groundwater profiles satisfied the experimental data which were obtained by using a model sand slope for Re<4 and y<0.1. Re is Reynolds number and y is an average hydraulic gradient by equation (26).","PeriodicalId":422881,"journal":{"name":"THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115707522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Studies on the Salt Contamination of Groundwater at the Coastal Area in Chiba City","authors":"H. Takamura, K. Mori","doi":"10.5917/JAGH1959.18.9","DOIUrl":"https://doi.org/10.5917/JAGH1959.18.9","url":null,"abstract":"","PeriodicalId":422881,"journal":{"name":"THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121460660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Momii, K. Jinno, T. Ueda, T. Itoh, T. Hosokawa, F. Hirano
{"title":"Numerical Analysis on Saltwater Intrusion and Dispersion is an Unsaturated-Saturated Coastal Aquifer","authors":"K. Momii, K. Jinno, T. Ueda, T. Itoh, T. Hosokawa, F. Hirano","doi":"10.5917/JAGH1959.28.103","DOIUrl":"https://doi.org/10.5917/JAGH1959.28.103","url":null,"abstract":"plied to the numerical computations on saltwater intrusion , dispersion and groundwater flow movement in coastal aquifers. In the present model, unsaturated zone is taken into consideration and this makes it easy to determine the position of free surface. It is shown that the difference between the theoretical solutions of fresh-salt water interface and the salt concentration distribution by numerical method mainly depends on the upward velocity component in the mixing zone. In case of the unsteady flow due to the excavation of the underground cavern , it is shown that the free surface above the cavern is withdrawn and the saltwater begins to move into the cavern due to the flow toward it. It is also shown that the discharge into cavern rapidly decreases immediately after excavating the cavern and then gradually approaches to the constant value. It is concluded that the","PeriodicalId":422881,"journal":{"name":"THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121536121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of Urbanization on Groundwater Run-off of Small Rivers in Tama Hilly Land","authors":"Y. Ando","doi":"10.5917/JAGH1959.21.91","DOIUrl":"https://doi.org/10.5917/JAGH1959.21.91","url":null,"abstract":"This paper is a study on effects of urbanization on gronndwater runoff of small rivers in Tama Hilly Land . In winter, the authors observed groundwater discharge of small rivers in Tama Hilly Land. <BR> The basins of five rivers are natural and those of four rivers are urbanized From results of the observation, it was made clear that groundwater discharges of urbanized rivers were less than those of natural rivers, and volume of groundwater discharge of urbanized rivers depended on hydro--geological structure . 1ま えがき 1960年 以降,大 都市近効の丘陵地や台地では 急 激に都 市化が進 行 した.こ の都市化の進行の過程 で,各 地に都 市水害が頻発 し,都 市化に よる洪水流出の変化が問題 とされ,そ の方面の研究の蓄積は 着実に進んでいる.一 方,近 年,都 市化 して も,下 流の農業用水を確保す る必要性や,都 市内の小河 川を保全す るために環境維持用水を確保す る必要性 などか ら,小 河川の地下水流 出に対す る都市化の 影響の評価 も現実的な重要性が高まってい る.と ころが,こ の方面の研究はほ とん どないのが現状で ある◎ そ こで,筆 者 らは,多 摩 ニュータウンによる大規模な都市化が進行中の多摩丘陵 の西部の小河川を 対象にして,地 下水流出に対す る都市化の影響について調査,研 究を行な うことに した.","PeriodicalId":422881,"journal":{"name":"THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129750693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Yokoyama, H. Umemiya, Kohei Katsuragi, H. Abiko, Tadayasu Suzuki, Kyoichi Watanabe
{"title":"Thermal Pollution Followed with Artificial Recharge: Simultaneous Recharge and Discharge with Same Amount@@@注入.揚水同量同時の場合","authors":"T. Yokoyama, H. Umemiya, Kohei Katsuragi, H. Abiko, Tadayasu Suzuki, Kyoichi Watanabe","doi":"10.5917/JAGH1959.17.97","DOIUrl":"https://doi.org/10.5917/JAGH1959.17.97","url":null,"abstract":"","PeriodicalId":422881,"journal":{"name":"THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129479682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}