Affaissement sol

Studies and reports in hydrology / Etudes et rapports d'hydFologie

8

Land subsidence

Proceedings of the Tokyo Symposium September 1969

Affaissement du sol

Actes du colloque de Tokyo Septembre 1969

Volume I

IASH / AIHS -UIICSCO

TITLES IN THIS SERIES / DANS CETTE COLLECTION

1.

2.

8.

9.

3.

4.

4.

Co-edition I A S H - Unesco / Coédition AIffS- Unesco

The use of analog and digital computers in hydrology: Proceedings of the Tucson symposium / L’utilisation des calculatrices analogiques et des ordinateurs en hydrologie : Actes du colloque de Tucson.

Water in the unsaturated zone: Proceedings of the Wageningen symposium / L’eau dans la zone non saturée : Actes du colloque de Wageningen.

Land subsidence: Proceedings of the Tokyo symposium / Affaissement du soi : Actes du colloque de Tokyo.

Hydrology of deitas: Proceedings of the Bucharest symposium / Hydrologie des deltas : Actes du colloque de Bucarest.

Co-edition IASH- Unesco- W M O / Coédition A I H S - Unesco- O M M

Floods and their computation: Proceedings of the Leningrad symposium / Les crues et leur évaluation : Actes du colloque de Leningrad.

Published by Unesco 1 Publié par l’Unesco

Representative and experimental basins: A n international guide for research and practice.

Edited by C. Toebes and V. Ouryvaev.

Les bassins représentatifs et expérimentaux : Guide international des pratiaues en matière

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de recherche. Publié sous la direction de C. Toebes et V. Ouryvaev. (Will also appear in Russian and Spanish / Paraîtra également en russe et en espagnol.)

5*. Discharge of selected rivers of the world, vol. I / Débits de certains cours d’eau du monde, vol. I.

6*. List of International Hydrological Decade Stations of the world / Liste des stations de la Décennie hydrologique internationale existant dans le monde.

7. Ground water studies: A n international guide for practice. (To be published / A paraître.)

* Quadrilingual publication : English

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Publicarion quadrilingue : anglais

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Land subsidence,

,,Proceedings of the Tokyo Symposium September 1969

Affaissement du sol

Actes du colloque de Tokyo Septembre 1969

Volume 1

A contribution to the International Hydrological Decade U n e contribution a la Décennie hydrologique internationale

IASH/AIHS - Unesco

Published jointly in 1970 by

the International Association of Scientific Hydrology (Secretary: L. J. TISON) Braamstraat 61 (rue des Ronces), Gentbrugge (Belgium),

and Unesco, Place de Fontenoy, 75 Pari~-7~

Printed by Imprimerie Ceuterick, Louvain (Belgium) Publié en 1970 conjointement par

l'Association internationale d'hydrologie scientifique (secrétaire : L. J. TISON) Braamstraat 61 (rue des Ronces), Gentbrugge (Belgique),

et l'Unesco, place de Fontenoy, 75 Pari~-7~

Imprimerie Ceuterick, Louvain (Belgique)

The selection and presentation of material and the opinions expressed in this publica- tion are the responsibility of the authors concerned and do not necessarily reflect the views of the publishers.

The designations employed an the presentation of the material do not imply the expression of any opinion whatsoever on the part of the publishers concerning the legai status of any country or territory, or of its authorities, or concerning the frontiers of any country or territory.

Le choix et la présentation du contenu de cet ouvrage et les opinions qui s'y expriment n'engagent que la responsabilité de l'auteur (ou des auteurs), et ne correspondent pas nécessairement aux vues des éditeurs.

Les dénominations employées et la présentation des divers éléments n'impliquent de la part des éditeurs aucune prise de position à l'égard du statut juridique de l'un quelconque des pays et territoires en cause, de son régime politique ou du tracé de ses frontières.

0 Unesco/IASH 19%

Printed in Belgium SC.69 XXIIAF

Preface

The International Hydrological Decade (IHD) 1965-1967 was launched by the thirteenth session of the General Conference of Unesco to promote international co-opet ation in research and studies and the training of specialists and technicians in scientific hydrol- ogy. Its purpose is to enable all countries to make a fuller assessment of their water resources and a more rational use of them as man’s demands for water constantly increase in face of developments in population, industry and agriculture. In 1970 National Com- mittees for the Decade had been formed in 104 of Unesco’s 125 Member States to carry out national activities and to contribute to regional and international activities within the programme of the Decade. The implementation of the programme is supervised by a Co-ordinating Council, composed of twenty-one Member States selected by the General Conference of Unesco, which studies proposals for developments of the pro- gramme, recommends projects of interest to all or a large number of countries, assists in the development of national and regional projects and co-ordinates international co- operation.

Promotion of collaboration in developing hydrological research techniques, diffusing hydrological data and planning hydrologieal installations is a major feature of the pro- gramme of the I H D which encompasses all aspe5ts of hydrological studies and research.

Hydrological investigations are encouraged at the national, regional and international level to strengthen and to improve the use of natural resources from a local and a global perspective. The programme provides a means for countries well advanced in hydrolog- ical research to exchange scientific views and for developing countries to benefit from this exchange of information in elaborating research projects and in implementing recent developments in the planning of hydrological installations.

As part of Unesco’s contribution to the achievement of the objectives of the I H D the General Conference authorized the Director-General to collect, exchange and disseminate information concerning research on scientific hydrology and to facilitate contacts between research workers in this field. To this end Unesco has initiated two collections of publica- tions “Studies and Reports in Hydrology” and “Technical Papers in Hydrology”.

The collection “ Studies and Reports in Hydrology” is aimed at recording data collected and the main results of hydrological studies undertaken within the framework of the Decade as well as providing information on research techniques. Also included in the collection will be proceedings of symposia. Thus, the collection will comprise the compila- tion of data, discussion of hydrological research techniques and findings, and guidance material for future scientific investigations. It is hoped that the volumes will furnish

Preface

material of both practical and theoretical interest to hydrologists and governments parti- cipating in the I H D and respond to the needs of technicians and scientists concerned with problems of water in all countries.

Unesco and the I A S H have together undertaken the implementation of several impor- tant projects of the I H D of interest to both organizations, and in this spirit a number of joint Unesco-IASH publications are envisaged.

Préface

L a Décennie hydrologique internationale (DHI) 1965-1975 a été ouverte par la Conférence générale de l’Unesco à sa treizième session pour favoriser ia coopération internationale en matière de recherches et d’études et la formation de spécialistes et de techniciens de l’hydrologie scientifique. Son but est de permettre à tous les pays d’évaluer plus complè- tement leurs ressources en eau et de les exploiter plus rationnellement, les besoins en eau augmentant constamment par suite de l’expansion démographique, industrielle et agricole. E n 1970 des comités nationaux pour ia Décennie ont été constitués dans 104 des 125 États membres de l’Unesco en vue de mener à bien les activités nationales et de participer aux activités régionales et internationales dans le cadre du programme de ia Décennie. C e programme est exécuté sous ia direction d’un Conseil de coordination composé de vingt et un États membres désignés par ia Conférence générale de l’Unesco, qui étudie les propositions d’extension du programme, recommande l’adoption de projets intéressant tous les pays ou un grand nombre d’entre eux, aide à ia mise sur pied de projets nationaux et régionaux et coordonne ia coopération à l’échelon international.

L e programme de la D H I , qui porte sur tous les aspects des études et des recherches hydrologiques, vise essentiellement à developper la collaboration dans les domaines de la mise au point de techniques de recherches hydrologiques, de la diffusion des données hydrologiques et de l’organisation des installations hydrologiques. I1 encourage les en- quêtes nationales, régionales et internationales visant à accroître et à améliorer l’utilisation des ressources naturelles, dans une perspective locale et générale. I1 offre ia possibilité aux pays avancés en matière de recherches hydrologiques d’échanger des idées, et aux pays en voie de développement de profiter de ces échanges d’informations pour I’élabo- ration de leurs projets de recherche et pour la planification de leurs installations hydrolo- giques selon les derniers progrès réalisés.

Pour permettre à l’Unesco de contribuer au succès de ia D H I , la Conférence générale a autorisé le Directeur générai à rassembler, échanger et diffuser des renseignements sur les recherches d’hydrologie scientifique et à faciliter les contacts entre chercheurs de ce domaine. A cette fin, l’Unesco publie deux nouvelles collections: ((Études et rapports d’hydrologie >) et ((Documents techniques d’hydrologie ».

L a collection ((Études et rapports d’hydrologie D a pour but de présenter les données recueillies et les principaux résultats des études hydrologiques effectuées dans le cadre de la Décennie, et de fournir des renseignements sur les techniques de recherche. O n y trou- vera aussi les Actes de colloques. Cette collection comprendra donc des données, l’exposé de techniques de recherches hydrologiques et des résultats de ces recherches, et une

Préface

documentation pour des travaux scientifiques futurs. O n espère que ces volumes fourni- ront aux hydrologues et aux gouvernements qui participent à la DHI des matériaux d’un intérêt tant pratique que théorique et qu’ils répondront aux besoins des techniciens et des hommes de science qui s’occupent, dans tous les pays, des problèmes de l’eau.

L’Unesco et I’AIHS ont entrepris de réaliser conjointement plusieurs projets impor- tants de la DHI qui les intéressent l’une et l’autre; dans cette perspective, elles ont prévu un certain nombre de publications Unesco-AIHS.

Table of contents Table des matières

TOME I

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Opening of the meeting and welcome address Dr. Kiyoo Wadati XXIII

Adress Mr. Michita Sakata, Prof. Harusada Suginorne, Prof. Léon J. Tison, Prof. L. J. XXIV Tison, Dr. Ryokichi Minobe, Dr. Fuji0 Egami and Dr. Arnold I. Johnson

Directions of Research on Land Subsidence Dr. Naotni Miyabe 1

Aquifer Systems Mr. Joseph F. Poland 1 1

Status of Present Knowledge and Needs for Additional Research on Compaction of Land Subsidence Problems in Taipei Basin Jui-Ming Huang and Chian-Min W u 21 Subsidence in the North German Coastal Region R. Dolezal and Marcus Petersen 35 Land-Surface Subsidence in the Houston-Galveston Region Texas Robert K. Gabrysch 43 Surface Deformation Associated with Oil and Gas Field Operations in the United States

Robert F. Yerkes and Robert O. Castle 55

Subsidence in the Wilmington OilField, Long Beach, Calif., U.S.A. Manuel N. Mayuga

and Dennis R. Allen 66

Land Subsidence in the Tokyo Deltaic Plain Takaniasa Nakano, Hiroshi Kadoniura Reviews of Land Subsidence Researches in Tokyo Yoshi Inaba, Shigeru Aoki, Tsuyoslii Results of Repeated Precise Levellings in the Land Subsidence Area in Tokyo Susurnu

and Iware Matsuda 80

Endo and Ryozo Kaido 87

Iwasaki, Ryozo Kaido and Naoini Miyabe 98

Land Subsidence in Osaka Sakuro Murayarna 105

Analysis of Land Subsidence in Niigata Tatsuro Okuniura 130 Niigata Ground Subsidence and Ground Water Change Takuzo Hirono 144 A Linear Relationship between Liquid Production and Oil-Field Subsidence Robert

O. Castle, Robert F. Yerkes and Francis S. Riley 162 Land Subsidence Related to Decline of Artesian Head at Baton Rouge, Lower Mississippi

Valley, U.S.A. George H. Davis and James R. Rollo 174 Tritium Dating of Land Subsidence in Niigata Shigehiko Kirniira, Masayuki Wada,

Hironao Kawasaki and Hiroshi Shiina 185

Shrinkage of Subaqueous Sediments of Lake IJssel (The Netherlands) after Reclamation

R. J. de Glopper 192

Hydrological Balance in the Land Subsidence Phenomena Shizuo Shindo, A. Kamala

and Tatsuo Shibasaki 20 1

Simulation of Groundwater Balance as a Basis of Considering Land Subsidence ir\ the Koto Deita, Tokyo Soki Yamamoto, Isarnu Kayane, Shigeru Aoki and Scietsu Fuji 21 5

Table des matières

Water Balance Investigation Based upon Measurements of Land Subsidence Caused by Geological and Geohydrological Properties of Land Subsided Areas-Case of Niigata Influence des Affaissements du Sol sur l’Hydrologie de Surface

Some Problems and Results of Laboratory and Field Investigations into Rock Movements Caused by Water Migration in Loose Granular Grounds in Hungary

O n the Variation of Artesian Head and Land-Surface Subsidence D u e to Groundwater Field Measurement of Aquifer-System Compaction, San Joaquin Valley, California, U.S.A.

Land Subsidence and Aquifer-System Compaction, Santa Clara Valley, California, U.S.A.

Land Subsidence, Earth Fissures, and Groundwater Withdrawal in South-Central Arizona, Some Problems of Time-Soil Compaction in Pumping Liquid from a Bed Z. G. Ter- Consideration about the Compaction Mechanism of Stratum Lying at the Deeper Horizon Kraenland Subsidence of Loess Soils of the Ukrainen

Ground Water Withdrawal I. Orloci

Lowland Shohuchi Takeuchi, Sadanori Kirnoto, M. Wada, K. M u k a i und H. Shinn Léon J. Tison

2s. Kesseru Withdrawal Shauzow Komaki

Ben E. Lofgren Joseph F. Poland U.S.A.

Marfirosyun und V. I. Ferronsky in Tokyo Lowland Tetsuro Shiobara

Herbert Schumann and Joseph F. Poland

V. F. Kraeyo

224 232 242 249

256 272 285 295 303 315 321

X

Foreword

The problems of land subsidence have not perhaps up till now attracted sufficient atten- tion. Yet, from the point of view of hydrology, these phenomena have had what may be called catastrophic results. The Tokyo symposium, the fruit of perseverance by Japanese and American scientists, has now shown that a handful of specialists has enabled this question to be studied very thoroughly.

Although no limit had been placed upon the type of subsidence to be studied, most of the Japanese and American authors paid particular attention to subsidence caused by the lowering of water-tables or by the exploitation of oil fields. Theory has advanced very far in these spheres, thanks to study of the compaction of strata, considered as a mechanical problem. Some of the papers, however, attributed land subsidence to other causes, such as the dissolution of limestone deposits, the working of mines, or purely tectonic movements.

The influence of soil components (sand, clay, loess, peat, etc.) interested certain researchers. The action of hurricanes and tides was also considered, particularly by Japanese specialists.

A number of contributions were confined to the effects of subsidence upon surface and sub-soil hydrology, irrespective of its causes. Finally, appropriate means of reducing subsidence were considered.

The 70 or so papers submitted do not however supply a full picture of the problem.

As already stated, the symposium was primarily the work of Japanese and American researchers. Europe might have been more largely represented, but, all the same the results of the meeting clearly indicate the present state of our knowledge; more especially they help to give an idea of the dangers caused by subsidence in areas which are among the most advanced, both industrially and agriculturally.

L. J. TISON

Avant-propos

Les problèmes que posent les affaissements du sol n’ont peut-être pas, jusqu’ici, retenu suffisamment l’attention. Pourtant ces phénomènes ont eu, du point de vue hydrologique, des résultats que l’on peut qualifier de catastrophiques. Le colloque de Tokyo, réuni grâce à la persévérance de savants japonais et américains, vient de montrer qu’un petit nombre de spécialistes ont permis de pousser très loin l’étude de ce problème.

Alors qu’aucune limitation n’avait été imposée quant à la nature des affaissements a étudier, ia plupart des auteurs japonais et américains ont particulièrement étudié les affaissements dus au rabattement des nappes aquifères ou à l’exploitation des champs pétrolifères. Dans ces domaines, les considérations théoriques ont été poussées très loin, grâce à l’étude de la compaction des couches, considérée comme un problème mécanique.

Certaines des études présentées ont cependant envisagé d’autres causes d’affaissement des sols, comme celles dues à la dissolution des calcaires, à l’exploitation des mines, à de purs mouvements tectoniques.

L’influence de la composition des sols (sables, argiles, lœss, tourbes, etc.) a retenu l’attention de certains chercheurs. L’action des ouragans et des marées n’a pas été négligée, surtout par les spécialistes japonais.

Quelques communications se sont limitées à l’action des affaissements, sur l’hydro- logie de surface et du sous-sol, indépendamment de leur origine.

Enfin l’étude des mesures propres à réduire les affaissements n’a pas été négligée.

Les quelque 70 rapports présentés ne donnent cependant pas une vue complète de la question. C o m m e on l’a dit, le colloque fut avant tout l’œuvre des chercheurs japonais et américains. L’Europe aurait pu être mieux représentée, mais, tels quels, les résultats présentés font bien le point de l’état actuel de nos connaissances; ils aident surtout à donner une idée des situations dangereuses créées par les affaissements dans des régions qui sont parmi les plus avancées tant sur le plan industriel que sur le plan agricole.

L. J. TISON

XII

Liste des participants

AUSTRALIA

~NGLES, Owen Graeme*, CSIRO, Division of Soil Mechanics, P.O. Box 54, Mt. Wauerley 3149, Vic.

B E L G I U M

TISON, Léon J.*, Secretary-General, IASH, 61 Braamstraat, Gentbrugge B U R U N D I

ALOYS, Ndenzako, Département de Géologie et Mines du Burundi, B.P. 745 à Bujumbura CANADA

ANGEL, H., Acres International Ltd., 1259 Dorchester RD, Niagara Falls CEYLON

JAYAWARDENA, A. W., Institute of industrial Science University of Tokyo, 22-1, Roppongi, 7-chome, Minato-ku, Tokyo

REPUBLIC OF CHINA

CHEN, Pei-Yuan, Department of Geology, National Taiwan University, 245, Sec. 3, Chilung Road, L u Hsian-Ku, Tokyo Kyoiku University, 5-29. Komaba 4-chome, Meguro-ku, Tokyo

YANG, Wan-Chuan, Tokyo Kyoiku University, 5-29, Komaba 4-chome, Meguro-ku, Tokyo FEDERAL R E P U B L I C OF G E R M A N Y

PETERSEN, Marcus*, Der Minister, für Ernähung, Landwirtschaft und Forsten, des Landes Schleswig-Holstein

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Taipei, Taiwan

WOHLRAB, Botho*, Universität Bochum, 463 Bochum-Linden, A m Hohwege 5 HUNGARY

SÁRVÁRY, Istvan, Research Institute for Water Resources Development, Budapest VIII.

Rákóczi-U. 41 IRAN

MIR-AFZALI, Abolghassem, Faculty of Engineering, Teheran University, No. 1 Koecheh Mohssenin, Khiahan Malek, Khiahan, Rootazad, Teheran

I T A L Y

BIANCHI, Alberto, Public Work Ministry, R o m a R E P U B L I C OF SOUTH AFRICA

BEZUIDENHOUT, Carolus A.*, Government Department of Mines Republic of South Africa, P.O. Box 1132, Johannesburg

ENSLIN, Johan F.*, Geological Survey of the Republic of South Africa, Private Bag 112, Pretoria USA

ALLEN, Dennis R.*, Department of OilProperties, City of Long Beach, P.O. Box 570, Long Beach, Calif., 90801

Lisi of participants

CALLAHAN, Joseph T., U. S. Geological Survey, H a n River Basin Survey Team, Tong Dae M u n CASTLE, Robert O.*, U.S. Geological Survey, 345 Middle Field Road, Menlo Park, Calif., 94025 CHILINGAR, George V.*, Petrol Engineering Department, University Southern California, 101 JOHNSON, Arnold I.*, Water Resources Division, U. S. Geological Survey, Denver, Colorado, LEE, Kenneth L.*, Department of Engineering, University of California, Los Angeles, Calif., LOFGREN, Ben E.*, U. S. Geological Survey, R m . W-2528, 2800, Cottage Way, Sacramento, MAWGA, Manuel N.*, Department of OilProperties, City of Long Beach, P.O. Box 570, Long PETERSON, F. L.*, Department of Geosciences, University of Hawaii, Honolulu, Hawaii, 96822 POLAND, Joseph F.*, U. S. Geological Survey, R m . W-2528, 2800, Cottage Way, Sacramento, PROKOPOVICH, Nikola P.* U.S. Department of the Interior; Bureau of Reclamation, Region 2, ROBERTS, James E.*, San Jose State College, 18570 Decatur Road, Monte Sereno, Calif., 95030 SAWABINI, C.ï., University of Southern California, 1831 So. 5th St., Alhambra, Calif., 91803 SCHUMANN, Herbert H.*, U.S. Geological Survey, Rm. 5017, Federal Building, 230 N. First STEPHENS, John C.*, U. S. Department of Agriculture, P. O. Box 469, Athens, Georgia, 30601 YERKES, Robert F.*, U. S. Geological Survey, Menlo Park, California, 345 Middle Field Road,

Ku, Shin Sol Dong 101, 3rd Floor, Seoul, Korea S. Windsor Blvd., Los Angeles, 90004, Calif.

80225 90024 Calif., 95825 Beach, Calif., 90801 Calif., 95825

2800, Cottage Way, Sacramento, Calif., 95825

Avenue, Phoenix, Arizona, 85025 Menlo Park, Calif., 94025 USSR

FERRONSKY, V. I.*, All-Union Scientific Research Institute of Hydrogeology and Engineering KRAEV, K.*, Institute of Geology, Academy of Science, Kiev

KOROBAINIKOV, V. A., Division of Hydrogeology and Special Work, Ministry of Geology, Moscow MURASHKO, A. I.*, The Byelorussian Drainage and Irrigation Research Institute, Lenin Avenue, OKHINCHENKO, A. I., State Hydrological Institute, Leningrad

Geology, Moscow

68, Minsk, BSSR

VENEZUELA

MENDEZ, Jose G., Venezuelan Society of Geologists, CIA. Shell de Venezuela (EPEX), P. O. Box 809, Caracas

JAPAN

ABE, Iwao, Tokyo Institute of Civil Engineering; Tokyo Metropolitan Government, 1-18, Konan AIHARA, Shigeru*, Capital City Development Bureau; Tokyo Metropolitan Government, 1,

AKI, Koichi, Kanto Gakuin University, Yokomaha City, Kanagawa

AOKI, Shigeru*, Tokyo Institute of Civil Engineering; Tokyo Metropolitan Government, 1-18, ARAI, Kunio, Faculty of Engineering; Tokyo Metropolitan University, 1-1, Fukazawa 2-chome, ARAMAKI, Makoto, Senshu University, 8, Kanda Jinbo-Cho 3-chome, Chiyoda-ku, Tokyo CHUMA, Kaoru, Mayor of Osaka, 4, Nakanoshima 1-chome, Kita-ku, Osaka City, Osaka DEGUCHI, Katsumi, Agricultural Engineering Research Station, Nakahara 1519, Hiratsuka City, ENDOH, Kazuo, Western Osaka High Tide Prevention Works Office, Osaka Prefectural Govern- ENDOH, Takeshi*, Tokyo Institute of Civil Engineering; Tokyo Metropolitan Government, 1-1 8,

1-chome, Minato-ku, Tokyo

Marunouchi 3-chome, Chiyoda-ku, Tokyo Konan 1-chome, Minato-ku, Tokyo Setagaya-ku, Tokyo

Kanagawa

ment, 53, Enokoshima Kaminomachi, Nishi-ku, Osaka City, Osaka Konan 1-chome, Minato-ku, Tokyo

XIV

FUJI, Shizuetsu*, Capital City Development Bureau; Tokyo Metropolitan Government, 1, FUJITA, Naomi, Geographical Survey Institute; Ministry of Construction, 24-13, Higashiyama FUJIYAMA, Masuji, Capital City Development Bureau; Tokyo Metropolitan Government, 1, FUKUO, Yoshiaki*, Disaster Prevention Research Institute; Kyoto University, Gokasho, Uji City, GOTO, Ken, Kyushu University, Hakozaki, Fukuoka City, Fukuoka

HAGA, Chikara, Capital City Development Bureau; Tokyo Metropolitan Government, 1.

HANAZONO, Sosuke, Entreprise Bureau, Ministry of International Trade and Industry, 3-1, HAKEDA, Kiyosi, Planning Department, Kanagawa Prefectural Government, 1, Nihon-Odori, HARADA, Nobuaki, Development Bureau, Economic Planning Agency, 1-1, Kasumigaseki HASECIAWA, Kazuo, Ministry of Agriculture and Forestry, Sendai City, Miyagi Prefecture HASHIMOTO, Michio, High Tide, Countermeasure Section; Civil Engineering Department; Osaka HAYAMI, Shoichiro, Tokai University, 1000, Orido, Shimizu City, Shizuoka Prefecture

HAYASHI, Hisato, National Institute of Industriai Health, Ministry of Labour, 2051, Kitsuki HAYASHI, Tetsuro, Geographical Survey Institute, Ministry of Construction, 24-1 3, Higashiyama HONMA, Akira, Construction Bureau, Niigata City Office Rokuban-Cho, Nishihori-Dori, Niigata HRONO, Takuzo*, Meteorological Research Institute; Meteorological Agency, 35, Koenji-kita INABA, Yoshi*, Tokyo Institute of Civil Engineering; Tokyo Metropolitan Government, 1-18, TNOKUTI, Syohei, Institute of Industriai Science; University of Tokyo, 22-1, Roppongi 7-chome, TSHIGAKI, Akira*, Planning Department, Kanagawa Prefectural Government, Nihon-odori, ISHII, Okiyoshi, Capital City Development Bureau; Tokyo Metropolitan Government, 1, Maru- ISHIWADA, Yasufumi, Geological Survey of Japan, Ministry of International Trade and Industry, ITOH, Koichi, Secretariat, Science Council of Japan, Ueno Park, Daito-ku, Tokyo

IWAI, Motoo, High Tide Countermeasure Section; Civil Engineering Department; Osaka IWAKI, Masayuki, High Tide Countermeasure Section; Civil Engineering Department; Osaka IWASAKI, Susumu, Tokyo Institute of Civil Engineering; Tokyo Metropolitan Government, IZAWA, Shoichi, Planning Department, Saitama Prefectural Government, 15-1, Takasago 3-chome, KADOMURA, Hiroshi*, Faculty of Science, Tokyo Metropolitan University, 1-1, Fukazawa KAIDO, Ryozo*, Tokyo Institute of Civil Engineering; Tokyo Metropolitan Government, 1-18, KAITO, Syunichi, Public Nuisance Division, Comprehensive Planning Bureau, Osaka City Office, KAMATA, A., Kokusai Aerial Surveys Co., Ltd., 2, 6-Bancho, Chiyoda-ku, Tokyo

KANEKO, Ryo, Agricultural Engineering Research Station, 1943, Yawata, Hiratsuka City, KANNO, Tatsuo*, Bureau of Port and Harbour; Tokyo Metropolitan Government, 1, Marunouchi

Marunouchi 3-chome, Chiyoda-ku, Tokyo 3-chome, Meguro-ku, Tokyo

Marunouchi 3-chome, Chiyoda-ku, Tokyo Kyoto

Marunouchi 3-chome, Chiyoda-ku, Tokyo Kasumigaseki 1 -chome, Chiyoda-ku, Tokyo Naka-ku, Yokohama City, Kanagawa 3-chome, Chiyoda-ku, Tokyo

Prefectural Government, Otemaenomachi, Higashi-ku, Osaka City, Osaka Sumiyoshi-Cho, Kawasaki City, Kanagawa

3-chome, Meguro-ku, Tokyo City, Niigata

4-chome, Suginami-ku, Tokyo Konan I-chome, Minato-ku, Tokyo Minato-ku, Tokyo

Naka-ku, Yokohama City, Kanagawa nouchi 3-chome, Chiyoda-ku, Tokyo 8, Kawada-Cho, Shinjuku-ku, Tokyo Prefectural Government

Prefectural Government, Otemaenomachi, Higashi-ku, Osaka City 1-18, Konan 1-chome, Minato-ku, Tokyo

Urawa City, Saitama 2-chome, Setagaya-ku, Tokyo Konan 1-chome, Minato-ku, Tokyo

4, Nakanoshima 1-chome, Kita-ku, Osaka City, Osaka Kanagawa

3-chome, Chiyoda-ku, Tokyo

List of participants KASAMA, Kiyomi, River Bureau, Ministry of Construction, 1-3, Kasumigaseki 2-chome, Chiyoda- KATO, Takeo, Faculty of Pedagogics, Yamagata University, 4-12, Koshirakawa-Cho, 1-chome, KATSUMATA, Takazi, Hokuriku Regional Office, Ministry of Agriculture and Forestry, 6800, KAWAGOE, Tatsuo, Public Works Research Institute, Ministry of Construction, 28-32, Honkoma- KATO, Masakazu,

KAWAKAMI, Naoko, Institute of Industrial Science, University of Tokyo, 22-1, Roppongi 7-chome, KAWASAKI, Hironao*, Agricultural Engineering Research Station, 1943, Yawata, Hiratsuka City, KAYANE, hamu*, Faculty of Science, Tokyo Kyoiku University, 29-1, Otsuka 3-chome, Bunkyo- KIKKAWA, Kyozo, Faculty of Science, Kyoto University, Noguchihara, Beppu City, Ohita KIMURA, Shigehiko*, Agricultural Engineering Research Station, 1943, Yawata, Hiratsuka City, KINO, Yoshito, Geological Survey of Japan, Ministry of International Trade and Industry, KINOSHITA, Takeo, Public Works Research Institute, Ministry of Construction, 28-32, Honkoma- KODAIRA, Yoshio, Faculty of Physics, Meisei University, 337, Hodokubo, Hino, Tokyo KOMABAYASHI, Yukihiro, Niigata City Office, Robukan-Cho, Nishihori-Dori, Niigata City, KOMAKI, Shauzow*, Faculty of Science and Technology, Saitama University, 255, Shimo Okubo, KOJIMA, Akio, Ministry of Agriculture and Forestry, 6800, Uchino-Cho, Niigata City

KOMATSU, Naomoto, Alaska Petroleum Development Co., Ltd., 11, Akefune-Cho, Sliiba Nishi- KONO, Koryu*. River Division, Bureau of Construction; Tokyo Metropolitan Government, KOYAMA, Shosuke, River Division, Bureau of Construction; Tokyo Metropolitan Government, KUDOH, Hiroshi, Kanto Regional Office, Ministry of Agriculture and Forestry, 20, Kanda KUMAI, Hisao*, Kanto Regional Office, Ministry of Agriculture and Forestry, 20, Kanda Jinbo- KURAMOCHI, Fumio, Tokyo Institute of Civil Engineering; Tokyo Metropolitan Government, KURODA, Kazuo, Geological Survey of Japan, Ministry of International Trade and Industry, KUWAKI, Osamu, Public Nuisance Division, Comprehensive Planning Bureau, Osaka City MAKINO, Fumio, Civil Engineering Department, Osaka Prefectural Government, Otemaenoma- MARUYAMA, Fumiyuki, National Research Center of Disaster Prevention, Science and Techno- MATSUDA, Lware*, Faculty of Science and Engineering, Tokyo Metropolitan University, 1-1, MATSUI, Tomatsu, Faculty of Civil Engineering, Osaka University, 9, Higashinoda-Cho, Miyako- MATSUI, Yoshiaki, Agricultural Land Bureau, Ministry of Agriculture and Forestry, 2-1, Kasu- MATSUMOTO, Hiroshi, Kanzaki River Improvement Office, Osaka Prefectural Government, MATSUMOTO, Tadashi, Public Enterprise Bureau; Osaka Prefectural Government, Otemaenoma-

ku, Tokyo

Yamagata City, Yamagata Uchino-Cho, Niigata City, Niigata gome 2-chome, Bunkyo-ku, Tokyo Minato-ku, Tokyo

Kanagawa ku, Tokyo Kanagawa

135, Hisamoto-Cho, Kawasaki City, Kanagawa gome 2-chome, Bunkyo-ku, Tokyo

Niigata

Urawa City, Saitama kubo, Minato-ku, Tokyo

5, Marunouchi 3-chome, Chiyoda-ku, Tokyo 1, Marunouchi 3-chome, Chyioda-ku, Tokyo Jinbo-Cho, 2-chome, Chiyoda-ku, Tokyo Cho 2-chome, Chiyoda-ku, Tokyo 1-18, Konan I-chome, Minato-ku, Tokyo 135, Hisamoto-Cho, Kawasaki City, Kanagawa

Office, 4, Nakanoshima 1-chome, Kita-ku, Osaka City, Osaka chi, Higashi-ku, Osaka City, Osaka

logy Agency, 1, Ginza-Higashi 6-chome, Chuo-ku, Tokyo Fukazawa 2-chome, Setagaya-ku, Tokyo

jima, Osaka

migaseki 1-chome, Chiyoda-ku, Tokyo

50, Niitaka Kitadori 3-chome, Higashi-Yodogawa-ku, Osaka City, Osaka chi, Higashi-ku, Osaka City, Osaka

x VI

MATSUMOTO, Teiji, Teikoku OilCo., Ltd. Exploration Department, 3-10, Hatagaya 1 -chome, MATSUOKA, Isao, Ministry of Agriculture and Forestry, 2-1, Kasumigaseki, 1-chome, Chiyoda-ku, MATSUO, Kazuo, Kawasaki City Office, 1, Miyamoto-Cho, Kawasaki City, Kanagawa

MATSUYAMA, Iwao, High Tide Countermeasure Section Civil Engineering Department, Osaka MAYAMA, Noboru, Kawasaki City Office, 1, Miyamoto-Cho, Kawasaki City, Kanagawa

MIKI, Gosaburo, Institute of Industrial Science, University of Tokyo, 22-1, Roppongi 7-chome, MINOBE, Ryokichi, Governor of Tokyo, 1, Marunouchi 3-chome, Chiyoda-ku, Tokyo

MIYABE, Naomi*, Komazawa University, 1, Komazawa, Setagaya-ku, Tokyo

MIYAHARA, Toshio, Tokyo Metropolitan Government, 1, Marunouchi 3-chome, Chiyoda-ku, MIYAKO, Junichi, Railway Technical Research Institute; Japanese National Railways, 180, MIYAMOTO, Noboru, Nihon-Koei Co., Ltd., L-1 1, Uchisaiwai-Cho 2-chome, Chiyoda-ku, MIYAZAWA, Katsuo, Niigata Prefectural Government, 5290, Ichiban-Cho, Gakko-machi, Niigata MOMIKURA, Yoshimasa, Kyushu Regional Agricultural Office, Ninomaru, Kumamoto City, MOMOTAKE, Matsuji, 237, Sekiya Hamamatsu-Cho, Niigata City, Niigata

MORIHIRA, Yoshitada, Water-Way Department, Aichi Prefectural Government, 1-2, Sannomaru MORIKAWA, Rokuro, Saitama University, 24-22, Motomachi 1-chome, Urawa City, Saitama MOTOJIMA, Daizo, River Division Bureau of Construction; Tokyo Metropolitan Government, MUKAI, Hisaichi*, Agricultural Land Bureau, Ministry of Agriculture and Forestry, 2-1, Kasumi- MATSUSHITA, Toshio, Geological Survey ot Japan, Ministry of International Trade and Industry, MURAYAMA, Sakuro*, Disaster Prevention Research Institute, Kyoto University, Yokooji MURAKAMI, Masashi, Nara Womens’ College

MORIMOTO, Ryohei, Earthquake Research Institute, University of Tokyo, 1-1, Yayoi 1-chome, MUROMACHI, Tadahiko, Railway Technical Research Institute, Japanese National Railways, MUSHIAKE, Katsumi, Faculty of Engineering, University of Tokyo 3-1, Hongo 7-chome, Bunkyo- MUTO, Mamoru, Kawaguchi City Office, 1-189, Aoki-Cho, Kawaguchi City, Saitama Prefecture NACHI, Toshio, High Tide Countermeasure Section; Civil Engineering Department; Osaka NAGASAWA, Mikio, Faculty of Culture, Osaka Prefectural University, Mozu Ume-Cho, Sakai NAKAGAWA, Seishi*, Faculty of Engineering, Kanazawa University, 40-20, Kotatsuno 2-chome, NAKAMATA, Yasushi, Nippon Gas Chemical Industrial Co., Ltd., lino Building, 2-2, Uchisaiwai- NAKAMURA, Kazuo, Bureau of Port and Harbour; Tokyo Metropolitan Government, 5, Maru- NAKANISHI, Toyoji, Niigata Prefectural Government, 5290, Ichiban-Cho, Gakko-machi, Niigata NAKANO, Takamasa*, Faculty of Science, Tokyo Metropolitan University 1-1, Fukazawa NAKAYAMA, Toshio, Tokyo Institute of Civil Engineering; Tokyo Metropolitan Government,

Shibuya-ku, Tokyo Tokyo

Prefectural Government, Otemaenomachi, Higashi-ku, Osaka City, Osaka Minato-ku, Tokyo

Tokyo

Hikari-Cho 2-chome, Kokubunji, Tokyo Tokyo

City, Niigata Kyushu

3-chome, Naka-ku, Nagoya City, Aichi Prefecture

1, Marunouchi 3-chome, Chiyoda-ku, Tokyo gaseki I-chome, Chiyoda-ku, Tokyo

135, Hisamoto-Cho, Kawasaki City, Kanagawa Shimomisu Higashinokuchi, Fushimi-ku, Kyoto Bunkyo-ku, Tokyo

2-180, Hikari-Cho, Kokubunji, Tokyo ku, Tokyo

Prefectural Government, Otemaenomachi, Higashi-ku, Osaka City, Osaka City, Osaka

Kanazawa City, Ishikawa Cho, 1 -chome, Chiyoda-ku, Tokyo nouchi 3-chome, Chiyoda-ku, Tokyo City, Niigata

2-chome, Setagaya-ku, Tokyo

1-18, Konan 1-chome, Minato-ku, Tokyo

List of participants NAKAYAMA, Yasushi, Agricultural Land Bureau, Ministry of Agriculture and Forestry, 2-1, NIIDATE, Masao, Capital City Development Bureau, Tokyo Metropolitan Government, 1, Maru- NISHIDA, Shoichi, Faculty of Science, Niigata University, 5214, Nishi-Ohata-Cho, Niigata City, NISHIDA, Tadashi, Kyushu University, 3576, Hakozaki, Fukuoka City, Fukuoka Prefecture NISHIDA, Yoshichika*, Faculty of Engineering, Kanazawa University, 3-6, Heiwa Machi I-chome,

Kanazawa City, Ishikawa Prefecture

NISHIZIMA, Teruyuki, Agricultural Land Bureau, Ministry of Agriculture and Forestry, 2- 1, Kasumigaseki i -chome, Chiyoda-ku, Tokyo

NODA, Koji, Bureau of Port and Harbour, Tokyo Metropolitan Government, 5, Marunouchi 3-chome, Chiyoda-ku, Tokyo

NOGUCHI, Shozo, Faculty of Agriculture, Tokyo Kyoiku University, 19-1, Komaba 2-chome, Meguro-ku, Tokyo

NOGUCHI, Takashi*, Faculty of Engineering, Kyushu University, 3576, Hakozaki, Fukuoka City, Fukuoka Prefecture

OHARA, Kosuke, Capital City Development Bureau, Tokyo Metropolitan Government, 1, Maru- nouchi 3-chome, Chiyoda-ku, Tokyo

OCHIAI, Toshiro, Agricultural Engineering Research Station, 1943, Yawata, Hiratsuka City, Kanagawa Prefecture

OHTA, Hideki*, Faculty of Engineering, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto City, Kyoto

OKAMOTO, Ryuichi, Public Works Research Institute, Ministry of Construction, 28-32, Honko- magome 2-chome, Chiyoda-ku, Tokyo

OKUBO, Dai, Asahi Glass Co., Ltd., 14, Marunouchi 2-chome, Chiyoda-ku, Tokyo

OKUMURA, Tatsuro*, Port and Harbour Research Institute, Ministry of Transportation, 1-1, ONODERA, Toru, Saitama University, 255, Shimo Okubo, Urawa City, Saitama Prefecture OZAKI, Tsugio, Geological Survey of Japan, Ministry of International Trade and Industry, SAITO, Sho, Geographical Survey Institute, 14-1 3, Higashiyama 3-chome, Meguro-ku, SAITO, Toshiki, Agricultural Land Bureau, Ministry of Agriculture and Forestry, 2-1, Kasumi- SAITO, Shimao, Kawaguchi City Office, 1-1 89, Aoki-Cho, Kawaguchi City, Saitama Prefecture SAKAI, Tadafumi, Resources Survey Institute, Science and Technology Agency, 2-2, Kasumigaseki SANO, Shigeo, Planning Department, Saitama Prefectural Government, i 5-1, Takasago 3-chome, SANO, Shunichi,*, Geological Survey of Japan, Ministry of International Trade and Industry, SASAGAWA, Akio, Teikoku Oil Co., Ltd., 31-10, Hatagaya I-chome, Shibuya-ku, Tokyo SATO, Gizen, Governor of Osaka, Otemaenomachi, Higashi-ku, Osaka City

SATO, Konosuke, Geological Survey of Japan, Tokyo Branch, Ministry of International Trade SATO, Kazushige, Nishimatsu Const. Co., Ltd., 13, Sakuragawamachi, Shiba-nichikubo, Minato- SAYAMA, Mitsuo*, Kyushu Regional Office, Ministry of Agriculture and Forestry, 2, Ninomaru- SEKITO, Yoshiaki, Science Council of Japan, Ueno Park, Daito-ku, Tokyo

SHIBASAKI, Tatsuo*, Research Institute for Natural Resources, 400, Hyakunin-Cho 4-chome, SHIDA, Isamu, Faculty of Pedagogics, Yamagata University, 4-12, Koshirakawa-Cho 1 -chorne, SHIMIZU, Keisuke, Bureau of Port and Harbour; Tokyo Metropolitan Government, 1, Marunou- SHIMIZU, Ryosaku, National Institute of Resources, Science and Technology Agency, 2-2, Kasu-

Kasumigaseki 1 -chome, Chiyoda-ku, Tokyo nouchi 3-chome, Chiyoda-ku, Tokyo Niigata Prefecture

Nagase 3-chome, Yokosuka City, Kanagawa Prefecture 135, Hisamoto-Cho, Kawasaki City, Kanagawa Prefecture Tokyo

gaseki I-chome, Chiyoda-ku, Tokyo 3-chome, Chiyoda-ku, Tokyo Urawa City, Saitama Prefecture

Hisamoto-Cho, Kawasaki City, Kanagawa Prefecture

and Industry, 8, Kawada-Cho, Ichigaya, Shinjuku-ku, Tokyo ku, Tokyo

Cho, Kumamoto City, Kumamoto Prefecture Shinjuku-ku, Tokyo

Yamagata City, Yamagata Prefecture chi 3-chome, Chiyoda-ku, Tokyo migaseki 3-chome, Chiyoda-ku, Tokyo XVIII

SHINDO, Shizuo*, Faculty of Engineering, Tokyo University, 2, 100, Nakanodai, Kujirai, Kawa- SHIOBARA, Tetsuro*, Faculty of Pedagogics, Hirosaki University, 1, Bunkyo-Cho, Hirosaki City, SHIRAI, Tsuneyuki, Public Health Department; Chiba Prefectural Government, 2, Ichiba-cho.

SOGABE, Hiroshi, Bureau of Sewerage; Tokyo Metropolitan Government, 5, Marunouchi 3-chome, SUDA, Kozi, Niigata Prefectural Government, 5290, Ichiban-Cho, Gakko-machi, Niigata City, SUGAWARA, Toshio, Ministry of Agriculture and Forestry, Ninomaru, Kumamoto City. Kuma- SUGIYAMA, Takashi, Kawasaki City Office, 1, Miyamoto-Cho, Kawasaki City, Kanagawa SUKEGAWA, Noboru, Faculty of Engineering, Tokyo University, 7-3-1 Hongo, Bunkyo-ku, Tokyo SUZUKI, Tadao, National Capital Region Development Commission, 6, Nagata-Cho 1-chome, TADA, Fumio, Faculty of Literature, Komazawa University, I, Komazawa, Setagaya-ku, Tokyo TAGAMI, Hazime*, River Division, Bureau of Construction; Tokyo Metropolitan Government, TAKAMURA, H., Geographical Institute, Rissho University, 4-2-16, Ohsaki-Cho, Shinagawa-ku, TAKEDA, Fumio, High Tide Countermeasure Section ; Civil Engineering Department; Osaka TAKEI, Yoshiyuki, Geological Survey of Japan, Ministry of International Trade and Industry, TAKEUCHI, Shohachi*, Hokuriku Regional Office, Ministry of Agriculture and Forestry, 153, TAKIGAMI, Juichi, Planning Department, Saitama Prefectural Government, 15-1, Takasago TAMAI, Nobuyuki, Faculty of Engineering, University of Tokyo, 3-1, Hongo 1-chome, Bunkyo- TANABE, Yoshizo, Capital City Development Bureau; Tokyo Metropolitan Government, 1, TANAKA, Kyoichi, Ministry of Agriculture and Forestry, 4-9, Izumi-Cho, Okayama City, Okayama TANAKA, Makoto, Industriai Water Division; Bureau of Sewerage; Tokyo Metropolitan Govern- TANAKA, Yasuji, Nishinomiya City Office, 3, Rokutanji-Cho 10-chome, Nishinomiya City, Hyogo TANAKA, Yutaka*, Capital City Development Bureau; Tokyo Metropolitan Government, 1, TANIGAWA, Toshio, Public Nuisance Division; Comprehensive Planning Bureau; Osaka City TOMODA, Masahiko, High Tide Countermeasure Section; Civil Engineering Department; Osaka TOSAKA, Michitaka, Tokyo Institute of Civil Engineering, 1-1-18, Kohnan, Minato-ku, Tokyo TOYODA, Takeichi, Kawasaki City Office, 1, Miyamoto-Cho, Kawasaki City, Kanagawa Prefecture TSUCHIDA, Sadao, Kawasaki City Office, 1, Miyamoto-Cho, Kawasaki City, Kanagawa Prefecture TSUKANO, Hiroe, Niigata Prefectural Government, 5290, 1-bancho, Gakko-machi, Niigata City, UEKI, Kazuo, Niigata Prefectural Government, 5290, 1-bancho, Gakko-machi, Niigata City, UEYAMA, Kenyoshi, Western Osaka High Tide Prevention Works Office, Osaka Prefectural UGATA, Hiroshi*, Capital City Development Bureau; Tokyo Metropolitan Government, 1, UKENA, Kazutoshi*, Bureau of Port and Harbour; Tokyo Metropolitan Government, 5, Maru-

goe City, Saitama Prefecture Aomori Prefecture

Chiba City, Chiba Prefecture Chiyoda-ku, Tokyo

Niigata Prefecture moto Prefecture Prefecture

Chiyoda-ku, Tokyo

1, Marunouchi 3-chome, Chiyoda-ku, Tokyo Tokyo

Prefectural Government, Otemaenomachi, Higashi-ku, Osaka City, Osaka 135, Hisamoto-Cho, Kawasaki City, Kanagawa Prefecture

Shichikuyama, Niigata City, Niigata Prefecture 3-chome, Urawa City, Saitama Prefecture ku, Tokyo

Marunouchi 3-chome, Chiyoda-ku, Tokyo Prefecture

ment, 5, Marunouchi 3-chome, Chiyoda-ku, Tokyo Prefecture

Marunouchi 3-chome, Chiyoda-ku, Tokyo

Office, 4, Nakanoshima I-chome, Kita-ku, Osaka City, Osaka

Prefectural Government, Otemaenomachi, Higashi-ku, Osaka City, Osaka

Niigata Prefecture Niigata Prefecture

Government, 53, Kaminomachi, Enokoshima, Nishi-ku, Osaka City, Osaka Marunouchi 3-chome, Chiyoda-ku, Tokyo

nouchi 3-chome, Chiyoda-ku, Tokyo

List of parriciparzts

UNO, Kazuharu', Kyushu Regional Office, Ministry of Agriculture and Forestry, 2, Ninomaru.

USUI, Shigenobu, Institute of Industrial Science, University of Tokyo, 22- 1, Roppongi 7-chome, WADA, Akio, High Tide Countermeasures Section; Civil Engineering Department; Osaka WADA, Masayuki*, Hokuriku Regional Office, Ministry of Agriculture and Forestry, 153, WADATI, Kiyoo, President of Saitama University, 255, Shimo-okubo, Urawa City, Saitama WATANABE, Kotaro, Mayor of Niigata, Rokubancho, Nishihori-dori, Niigata City, Niigata WATANABE, Ryuzi, River Bureau, Ministry of Construction i -3 Kasumigaseki 2-chome, Chiyoda- WATANABE, Satoshi, Capital City Development Bureau; Tokyo Metropolitan Government, WATANABE, Takeshi, River Division, Bureau of Construction; Tokyo Metropolitan Government, WATARI, Shiro, Governor of Niigata Prefecture, Ichibancho, Gakko-machi, Niigata City, Niigata YABE, Masahiro, Public Works Research Institute, Ministry of Construction, 28-32, Hon-Koma- YAGI, Norio, Disaster Prevention Research Institute, Kyoto University, (Home) Yokooji Shimo- YAMAKAMI, Hideo, Kanto Natural Gas Development Co., Ltd. Mobara Kogyosho, 661, Mobara, NAKAOKA, Saburo, Asahi Glass Co., Ltd., 14, Marunouchi 2-chome, Chiyoda-ku, Tokyo YAMAMOTO, Eitaro, Kanzaki River Improvement Office; Osaka Prefectural Government, 50, YAMAMOTO, Soki*, Tokyo Kyoiku University, 29-1, Otsuka 3-chome, Bunkyo-ku, Tokyo YAMAMOTO, Yasuharu, Industriai Water Division; Bureau of Sewerage, Tokyo Metropolitan YAMAZAKI, Hisao, Development Bureau, Economic Planning Agency 1-1, Kasumigaseki 3-chome, YAZIMA, Ikushi, Industrial Water Division; Bureau of Sewerage, Tokyo Metropolitan Govern- YOSHIDA, Kishichiroh, High Tide Countermeasure Section; Civil Engineering Department; Osaka YOSHINAKA, Ryunoshin, Faculty of Engineering, Saitam University, Shimo Okubo, Urawa City, YOSHINO, Fumio, Institute of Industrial Science, University of Tokyo, 22-1, Roppongi 7-chome, YOSHITANI, Susumu*, Faculty of Engineering, Kyoto University, Yoshidahonmachi, Sakyo-ku, YUHARA, Kazo, National Research Center for Disaster Prevention, Science and Technology

Cho, Kumamoto City, Kumamoto Prefecture Minato-ku, Tokyo

Prefectural Government, Otemaenomachi, Higashi-ku, Osaka City, Osaka Shichikuyama, Niigata City, Niigata Prefecture

Prefecture Prefecture ku, Tokyo

1, Marunouchi 3-chome, Chiyoda-ku, Tokyo 1, Marunouchi 3-chome, Chiyoda-ku, Tokyo Prefecture

gome 2-chome, Bunkyo-ku, Tokyo

misu Higashino Kuchi, Fushimi-ku, Kyoto City, Kyoto Mobara City, Chiba Prefecture

Niitaka Kitadori 3-chome, Higashiyodogawa-ku, Osaka City, Osaka Government, 5, Marunouchi 3-chome, Chiyoda-ku, Tokyo

Chiyoda-ku, Tokyo

ment, 5, Marunouchi 3-chome, Chiyoda-ku, Tokyo

Prefectural Government, Otemaenomachi, Higashi-ku, Osaka City, Osaka Prefecture Saitama Prefecture

Minato-ku, Tokyo

Kyoto City, Kyoto Prefecture

Agency, i, Ginza-higashi 6-chome, Chuo-ku, Tokyo ORGANIZING C O M M I T T E E Chairman: WADATI, Kiyoo

Vice-chairmen: AKI, Koichi and MIYABE, Naomi Secretary-Generai: YAMAMOTO, Soki

Chairman, Science Sub-committee: MIYABE, Naomi

AKAGI, Toshinobu, Japanese Society of Soil Mechanics and Foundation Engineering AKI, Koichi, Member of Japanese National Commission for UNESCO

CHUMA, Kaoru, Mayor of Osaka

HAGIWARA, Takahiro, Professor of University of Tokyo HAYAMI, Shoichiro, Member of Science Council of Japan

Members:

xx