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A study was made to determine the relation between the damage caused by the earthquake of the 22nd of May, 1960, in Valdivia, Chile, and the geology of the city. A geologic map and an investigation of the damage was made. There was no evidence in the area of fault movements produced by the earthquake. The inundation of extensive areas of Valdivia and its environs are attributed more to compaction of Recent sediments than to a general sinking of the coast. Validivia is situated in the basin of the Rio Valdivia. The geologic formations that crop out there are composed of Pleistocene and Recent sediments. Six mapable units have been selected for the preparation of this report. The great part of the damage in the city of Validivia was caused by defective construction; nevertheless, the greatest damage is observed in areas where Unit QV 6, Recent alluvium or artificial fill, crops out. More detailed geologic studies should be made upon which to base construction and future planning. The studies should be complemented by drilling, gravimetric investigations, and soil studies.

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This paper describes a system proposed by a Federal Interagency Work Group for providing access to large quantities of hydrological data. The National Water Data Exchange (NAWDEX) will be a confederation of data-acquisition organizations that are willing to make their data available to other data users. NAWDEX will take full advantage of ongoing data handling activities and will provide the means to present data in a standard format. An ultimate goal of the system will be standardization and quality control of all of the data. Management of NAWDEX will be lodged in a Systems Central, which will assure that data are made availabl e according to the time frame and the format required by the user. Access to the data will be through an index maintained by Systems Central. Full implementation of NAWDEX will require 4 to 5 years. A technical advisory group, consisting of members representing the Federal and non-Federal sectors, and topical work groups, established in response to specific needs, will provide input during the development of NAWDEX. RESUME On decrit un systeme qui a ete propose par un federal Interagency Work Group pour avoir acces aux grandes quantites de donnees hydrologiques. L'Echange National des Donnees d'Eau (NAWDEX) sera une confederation des organismes d'acquisition des donnees qui ont l'amabilite de fournir des donnees utiles aux personnes qui les utilisent. NAWDEX profitera au maximum du maniement des donnees en progres et fournira les moyens de presenter les donnees dans un style regulier. La direction de NAWDEX se situera dans un Systeme Central, qui s'assurera que toutes les donnees puissent etre accessibles suivant la forme du temps et Ie style qui sont exiges par les personnes qui les utilisent. L'acces aux donnees se fera par un index garde par les Systemes Centraux. L'equipement complet du NAWDEX exigera 4 ou 5 ans. Un groupe de conseillers techniques (constitue des membres representant les secteurs federaux et non federaux) et des groupes locaux de travail se sont etablis pour repondre aux besoins specifiques, et fournir leur aide pendant Ie developpement du NAWDEX.

No abstract