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Systematic reconnaissance mapping and registration of slope movements

  • Cotecchia V. 
General Report

Summary

The General Report consists of three parts. In part 1 the directions and purposes achieved with landslie mapping works so far published are briefly reviewed. In part 2 the papers contributed to Theme 1 of the Symposium are summarized.

In part 3 the Reporter gives a general picture of the forms, content and purposes necessary, in his opinion, for mass movement mapping, above all for medium scale mapping. For this purpose he points out how necessary it is to make, before drawing up the final synthetic map, a series of systematic basic studies and correlations on the different circumstances influencing slope stability (mineralogical, petrological and tectonic characters of rocks; geotechnical properties; tectonics and eustacy; neotectonics and earthquakes; hydrogeology; climatic conditions; vegetation) and how such studies should be collected in analytical maps, catalogues, etc. Next, modern methodologies for data acquisition (registration, coding and data bank; representation of landform and geodynamic processes; remote sensing and aerophotogrammetry; special techniques for investigating landslides; deterministic and statistical models) through the quick methods better suited to systematic reconnaissance of landslide phenomena are discussed.

Finally, the data which facilitate forecasting and the difficulties involved in the drawing of maps are stated.

Keywords

Clay Slope Stability Mass Movement Rock Mechanics Rock Burst 

Cartographie Systematique et Enregistrement des Mouvements de Terrain

Résumé

Le Rapport Général se compose de trois parties. La première étant une brève vue panoramique des orientations et des fins mis en évidence dans les essais de cartographie des glissements de terrain publiés jusqu’aujourd’hui.

Dans la deuxième partie sont resumées les contributions presentées au Thème 1 par les participants au Symposium. Dans la troisième partie le Rapporteur Général trace une vue d’ensemble des formes, des contenus et de l’uage d’une cartographie des mouvements de terrain en se référant surtout à la cartographie à moyenne échelle. On montre qu’il est nécessaire, pour ce dernier fin, de faire précéder le document de synthèse final par une série d’études et de corrélations systématiques de base au sujet des différentes circonstances qui influencent la stabilité des pentes (caractéristiques minéralogiques, pétrographiques et tectoniques des roches; caractéristiques geotéchniques; tectonique et eustatism; néotectonique et sismologie; hydrogéologie; conditions climatiques; végétation) et comment ces études devraient être reunies en cartes analytiques, catalogues, etc. On expose en outre les actuelles méthodologies d’acquisition-données (registration, codes et banques des données; représentation géomorphologique et processus géodynamiques; télédétection et photographies aériennes; techniques spéciales pour les études des glissements de terrain; modèles déterministes et statistiques) à travers de moyens rapides qui mieux s’indiquent pour une réconnaissance systématique des phénomènes de glissement de terrain.

Enfin sont indiqués les éléments qui mieux conduisent à la prédiction ainsi que les difficultés de tracer des cartes de risque.

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Copyright information

© International Association of Engineering Geology 1978

Authors and Affiliations

  • Cotecchia V. 
    • 1
  1. 1.Institute of Engineering Geology and GeotechnicsUniversity of BariItaly

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