THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY最新文献

{"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":"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":"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":"Heat Exchange of Storage Type through Underground Strata by Artificial Recharge","authors":"T. Yokoyama, H. Umemiya, H. Abiko","doi":"10.5917/jagh1959.17.55","DOIUrl":"https://doi.org/10.5917/jagh1959.17.55","url":null,"abstract":"In the heavy snow fall area, Yonezawa, Nagaoka, etc. , they have taken a good use of snow melting pipes. But these are not sufficiently familiar to that district, for the water supply is poor. And so we have had an idea of a use of a stratum for a regenerator by artificial recharge and a reuse of repumped water for snow melting pipes. Injecting cooling waste water has been investigated since before, but water surface up-lift effects when restoration of injection and quantitative analysis for heat storage are not successfully studied. <BR> We have injected at rate of 0. 7m<SUP>8</SUP>/min for a month, and examined ( i ) the reason why we could inject, (ii) the up-lift effect near wells, and (iii) the regenerating effect, from isotrapy of the peameable, comparing the experimental piezometric surface with the ideal, and water quality and temperature change. <BR> The experimental field is situated in a southern part in Yarnagata basin. The aquifers are 40m and 80m in depth. The injection, the observation and the discharge wells are drilled at the corners of the 22. 4m equilateral triangle. In isotrapic confined aquiefers if the flow is subject to Darcy's law and the deficiency of the boreholes is negligible, thg steady state piezometric surface is given by equation ( 4 ) s — Q0/ 471-71 • In (r2/r2) = Q0/4r T. InC((x — a) 2 +y9/( (x+ a) 2 -+-y2)) . ........ .................. ( 4 ) where Q0 is the rate of both recharge and discharge, T is the coefficient of transmissibity, and 2a is a distance betweer the injection well and the discharge one, and a is 11. 2m. As the results, we have reached the following conclusions. ( i ) The effective path between the injection well and the discharge well cannot be formed, because transmisibities near the wells are almost uniform during 20 days of successful pumping test. So we may say that water was injected in natural state. (i i) The total amount of injected water in a month is 2. 4 x 104m8, nevertheless we observed *山 形大学工学部 **日 本地下水開発株式会社 (昭和49年11月18日 受理.昭 和50年3月9日 再受理) onlytheslighttrans至entde{iclencyoftheboreho1esbyprec圭pitationo{lron.Thenatthe injectionweU,theobservedplezomenticsurface圭shigherthanthetheoretica藍va茎ue,butat theotherweUstheobservedandthetheoretica霊valuesarenear董yequaLSimiarly,judging fromthechangeofwaterquahtyit圭struethattheequat董on(4)canshowthepiezometric surface圭nthecaseofs量multaneousrechargeanddischarge. (111)Thoughwe1nject2.4×10`m3waterat3.C,thed董schargetemperature気snotlower thanlloC.Itisrevealedthattheabove賛mentionedsystemcanbesufficiendyapPliedtothe snowmelt薫ngPlpedroadof6minwidthand100min三engththroughwinter. 1.緒 論 東北,北 陸地方 の豪雪地帯で は表流水 お よび地 下水利用 の消雪 パ イプが冬期交通確保に活躍 してい る.し か し,都 市化 に伴 な う水需要増大 のため,表 流水 は減少 し地下水位は低下 して,消 雪 パ イプの 普 及が困難 となっている. 水不足は む しろ全 国的 な ものであ り,特 に工 業地帯 においては,過 剰揚水に ともな う塩水化お よび 地盤沈下が広範 囲にわ た って発生 してい る.し たが って,こ れ ら工業用 水の節約 を 計 る た め,再 使 用(1)や造水(2).(3)および帯 水層での還元再使用く4)一(8)が研究.実 施 され て きた.こ れ ら深 層地下水は, 短期間では涌養 され ないため,揚 水を抑 え るか何 らか の方法 で洒養す る必要 があ るが,実 行 され てい る例9は少 ","PeriodicalId":422881,"journal":{"name":"THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY","volume":"94 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":"126421888","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}

{"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}

{"title":"霞ケ浦北岸台地.出島地域における地下水流動系の解析(第一報)","authors":"浩子 岡崎, 力山 石川, 静夫 新藤","doi":"10.5917/JAGH1959.27.157","DOIUrl":"https://doi.org/10.5917/JAGH1959.27.157","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":"128692305","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":"Experiments on Characteristics of Soil Water Movement during Drainage","authors":"M. Taniguchi, Y. Sakura","doi":"10.5917/JAGH1959.25.139","DOIUrl":"https://doi.org/10.5917/JAGH1959.25.139","url":null,"abstract":"It has been pointed out that the capillary fringe plays an important role in the infiltration process. In the drainage process, characteristics of the capillary fringe has not been elucidated yet, notwithstanding it significantly influences the flood recession curve. <BR> The purpose of this study is to make clear characteristics of soil water movement during drainage and the influence of groundwater recharge upon the flood recession curve. <BR> Experiments were carried out using a soil column with a water table maintained at 140 cm below the surface. The soils used in the present study are two kinds of glass beads. Artificial steady rainfall were supplied to the top of the soil column for six hours. The experiments on the drainage process started when the steady rainfall stopped. Discharge, matric suctions and water flux were measured continuously. <BR> The results and conclusions of this study are summarized as follows ; <BR> 1. After the steady rainfall, the drainage front began to move faster downward than the wetting front in the infiltration process. When the drainage front reached the upper boundary of the saturated capillary water zone, it disappeared and the recession of discharge began instantaneously. <BR> 2. The soil water zone above the water table is divided into two zones during drainage. One is the water zone that the gradient of the total head maintains unity, and the other is that the gradient approaches zero. A break point in the profiles of total head moved upward with advancing of the drainage process from the upper boundary of the saturated capillary water zone to the upper boundary of the unsaturated capillary water zone. <BR> 3. It was found that the flood recession curve can be estimated from the equation of soil water movement considering gravitational term without diffusion term, if we determine hydraulic conductivity, water content in the suspended water zone and the depth of a break point in the profile of total head changed with time. 本稿は1983年度日本地理学会春季学術大会にて発表した内容に加筆 ・修正をしたものである. 筑波大学大学院地球科学研究科 千葉大学理学部地学教室 Graduate Student, Institute of Geoscience, University of Tsukuba Department of Earth Sciences, Faculty of Science, Chiba University","PeriodicalId":422881,"journal":{"name":"THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY","volume":"31 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":"128811305","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":"Explanation) The evaluation of granular aquifer fron geophysical well logging","authors":"Keiichi Kodai","doi":"10.5917/JAGH1959.17.84","DOIUrl":"https://doi.org/10.5917/JAGH1959.17.84","url":null,"abstract":"1.は じめ に 地下水調査に利用す るすべ ての検層技術は,油 層工学 か ら発展 して きてい る.し か しなが ら,油 井 検層 の対象流 体は石 油 とガ スなので,淡 水層 の評価は,検 層解析上,特 殊な問題 としてあつかわれ て い る.こ れに対 して,水 井戸検層では多 くの場合,水 だけを対 象にす れば よい点で単純であ るが,油 層 と地 下水層 とでは地層や水質に大 きな相違が あ り,油 層工学で発展 してきた解析 技術をその まま踏 襲で きな い部分 も多 い.例 えば,油 層解析にお いて,間 隙率は産油層 とよ く比 例す るので重要視 され るが,砂.礫 か らな る未 固結 の堆積物が お もな対象に な る帯 水層の場合 には,有 効間隙率が透 水性 と 関係す るので,必 らず しも比例 しない◎砂.礫 か らな る帯 水層中には,程 度 の差は あ るが,砂 に比 べ て粒径 の小 さいあ る量の シル ト.粘 土 を一般に含有す る場合が多 い.粘 土成分は 全ての検層図に,あ る度 合で影響す る.粘 土鉱物 は,粘 土層 にだけでな く,ご く一般 に存在 し,多 くの不均一な透 水性地 層中に も存 在す る.こ の粘土.シ ル ト自体,非 常 に大 きな間隙率 を有す るに もか かわ らず,こ の間隙 水分 の多 くは,産 出可能 な水 と無関係で流動 しない水で あ る.透 水性は,間 隙率か らだけでな く,鉱 物組 成の粒 度お よび セ メンテーシ ョンに関係す るが,坑 井物理検層か らは直接的に透 水性を測 ること が で きない ので,検 層か ら間隙率を計算 し,こ れに地域的な他 のデータを加えた経験式を工夫 し,透 水性を推測す ることにな る. 地 下水調査 の最終 目標 は,正 確 で安全 な水量算定 を行な うことにあ るが,そ の前に,物 理検 層に よ る正確 かつ 詳細な地下地質 構造 を把握 し,特 に帯水層の識別評価 を行な うことが必要であ る.そ れに 臆,透 水性に関係 した幾つか の変数 の測定 が水理学的 に必要 とな る. 未 固結帯水 層の場 合,土 質試験 か ら得 られ る正確 な データは,お もに シル ト.粘 土に限 られ,帯 水 層 に最 も関係のあ る砂.礫 の層につい ては,概 乱試料 か ら自然状態を推察す るに とど まるか,悪 くす れぽ採取不能 にな る.ま た,採 取 可能 な シル ト.粘 土 の試料 において も,経 済的な理 由か ら,オ ー.ル コア リングを行な うことの方 がむ しろ稀であ るので,と て も連続 的な情報を得 ることので きな いのが","PeriodicalId":422881,"journal":{"name":"THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY","volume":"392 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":"121788285","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":"Study of Longitudinal Dispersion Coefficient in a Homogeneous and Isotropic Porous Media","authors":"K. Jinno","doi":"10.5917/JAGH1959.21.55","DOIUrl":"https://doi.org/10.5917/JAGH1959.21.55","url":null,"abstract":"This paper is concerned with the study of the longitudinal dispersion coefficient in a homogeneous and isotropic porous media. Experimental data in the range of laminar flow where Darcy's law is valid are obtained and compared: with the experimental formula given by D. R. F. Harleman et al. (1963) . <BR> Abstract of the theoretical derivation for permeability, average velocity in pore systems and longitudinal dispersion coefficient shown by P. G. Saffman (1959) are explained briefly, and compared with the experimental data. 1.序 論 浸透層 内の分 散現象 は層 内の流速,構 成土粒子 の粒度分 布,形 状,空 げ き率,流 体 の粘性・密 度・ 分 子拡散 な どに よ り支配 され るが,こ れ らの物理量 相互 の関係 を把握す る ことは塗近年 問題 とな って い る地下水 の汚染 お よび塩水 化 の予 測あ るい は トレーサ ーに よって地下 水流 の調査 を行 な う上 で重 要 な課題 であ る◎ 浸透 層 内の分散係数 を流 速,構 成土粒子,空 げ ぎ率 な どで理論的 に表現 しよ うとす る研究 にはSch eidegger(1958),JosselindeJong(1958),Saffman(1959),武 内(1971)な どが あ る.Sche ideggerは 浸透層 内の流れ の場 が均一 等方性 で層流 状態の流れ の とき,分 散係 数が水 頭勾配 に比 例す るとい う結果 をえてい る.JossehndeJongは 浸透 層 内の流 れの場 を等半径,等 長の細管 が樹枝 状 に連 結 した細管 モ デル と考 え,こ れ らの細管 の方 向を確 率変数 とし分 散係数 を評価 した◎ SaffmanはJorrelindeJongの 細管 モデルに新 たに細管 内の分 子拡散 を考慮 した理 論 を考 え,Josse lindeJongの 理論 がその特別 の場 合 であ るこ とを示 してい る.武 内はJosselindeJongの 細管 モ デルを拡 張 し細管径 が対数正規 分布 をす ると してモ ソテ カル ロ法 に よ り分散係 数を シ ミュ レー トして *九 州大学工学部 Kyushu University いる.こ れ らの研究の うち,Schideggerは ラソダムウォー・クモデルを仮定 していて,浸 透層固有の 分散現象の解析 とは言い難い ようである.ま た,武 肉のシ ミ議ぴ一ションでは構成土粒子の粒度分布 か ら細管の樹枝状結合体モデルを表現 し,そ の中を移流分散す る拡散物質の挙動をモンテカル ロ法に よ り追跡 しえた点で評価できるが,実 験値 との比較によ ゆ末定係数20決定が必要となっていることお よび分子拡散 との関係があま り論 じられていない点などが陶鳳 藍と考 えられる.し たがって本論 では Slaffrmの 理論が解析的あ りよく物理的な機構を説輿していると考え,こ の理論の主に縦方向(流 れ方向)分 散係数の概要を述べ本論で行 った実験結果 と比較 し分散璽象の機構を考察した. 忽 実験装置および実験方法について 図一1に 実験装置を示す.ま た表一1に は実験に用いたぽぼ球形の濾材試料を示 している.実 験は 浸透 層を最初に十分 うすい塩 水 で飽 和 し静 置 し た後,下 部 のバル ブを開 き上部 よ り淡水 を一定 流量 で流 し濃度変化 をx=50.5cm 及 び炉80.c皿 の地点に設置 した 白金線 プロー ブで測定す る手 順を とった. さて,浸 透 層 内の流れ は レイ ノル ズ数 の増 加 に ともない層流域か ら定 常慣 性領域 を経 て乱流 域へ と遷移 す るので,こ れに と もない分散 現象 の機構 も異 って くることが考 え られ る.し たが って本論 では レイ ノルズ数Reと 摩擦損失係数 C1と を測 定 した.こ こにRe,Cノ はRe=u dm/v,Cノ ・:〔ρgid犠/ρ(λu)212〕であ り u:浸 透 層 内の実質平均 流速,dm:濾 材粒子 の 平均粒径,ン:流 体 の動 粘性係数,ρ=流 体密度 9:重 力の加速度,i:水 頭勾 配,λ:空 げ き率. 次 に縦 方向(主 流 方向)の 分散 係数 の測定 法 につ いて述ぺ よ う.Harlemanら(1963)の 実","PeriodicalId":422881,"journal":{"name":"THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY","volume":"22 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":"121908831","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}