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Title: INSTABILITY CHARACTERIZATION OF THE GEOLOGICAL FORMATION "AREIAS E ARGILAS DE TAVEIRO" IN THE CONDEIXA AND COIMBRA AREAS (CENTRAL-WESTERN PORTUGAL)
INSTABILITY CHARACTERIZATION OF THE GEOLOGICAL FORMATION "AREIAS E ARGILAS DE TAVEIRO" IN THE CONDEIXA AND COIMBRA AREAS (CENTRAL-WESTERN PORTUGAL)

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Beatriz Neto; Pedro Santarem Andrade; Antonio Neves Trota
10.5593/sgem2024/1.1/s02.24
10.5593/sgem2024/1.1
1314-2704
978-619-7603-67-5
English
24
1.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
2.Hydrogeology, Engineering Geology and Geotechnics
The work aims to characterize the slope instabilities present in the Taveiro Sand and Clay - Areias e Argilas de Taveiro - Formation, which occurs in the municipalities of Condeixa and Coimbra, in central-western Portugal. The Areias e Argilas de Taveiro Formation, of Upper Cretaceous – Campanian - age, is made up of successions of metric layers of red, and brownish or pinkish pelites, interbedded with coarse arkosic sandstones. It has as maximum thickness of about 170 m. A total of 27 slopes with stability problems were counted in both municipalities, 16 in Coimbra and 11 in Condeixa. Several information was collected, as morphometrics, the lithological type, the existence of vegetation, the presence of erosive processes, the probable age of occurrence and the type of instability movement. The characterized slopes correspond entirely to excavation slopes. They vary in length from 18 to 180 meters, in height from 1.5 to 7 meters, and in dip from 31° to near vertical. The type of instability found corresponds mainly to shallow landslides (48.4%), and with a significant number of rotational landslides (29.0%) and earth flows (12.9%). Regarding the possible consequences of instability, most of the situations related to instability movements can reach roads with permanent traffic (81.5% of the slopes).
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The financial support of FCT-MEC through national funds and, when applicable, co-financed by the ERDF within the PT2020 partnership, through the research projects UID/Multi/00073/2020 of the Geosciences Centre and UID/Multi/00308/2020 is acknowledged.
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https://doi.org/10.5593/sgem2024/1.1/s02.24
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Proceedings of 24th International Multidisciplinary Scientific GeoConference SGEM 2024
24th International Multidisciplinary Scientific GeoConference SGEM 2024, 1 - 7 July, 2024
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
169-176
1 - 7 July, 2024
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Slopes, Stability, Clay, Central Portugal

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