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TitleEstudio de los flujos ocurridos en el 2007 en Chalala y Coquena, Purmamarca, provincia de Jujuy
AuthorGonzalez, M A; Baumann, V; Jackson, L E, Jr.
SourceRevista Asociacion Geologica Argentina vol. 65, no. 4, 2009 p. 791-804
LinksOnline - En ligne
Alt SeriesEarth Sciences Sector, Contribution Series 20080655
Mediapaper; on-line; digital
File formatpdf; xml
AreaJujuy Province; Chalala; Coquena; Purmamarca; Argentina
Lat/Long WENS-72.0000 -71.0000 22.0000 21.0000
Subjectsengineering geology; surficial geology/geomorphology; landslides; landslide deposits; mudflows; flow velocities; flow mechanisms; debris flows; debris flow deposits
Illustrationslocation maps; photographs; tables; graphs
Released2009 01 01
AbstractThis work presents the results of the investigation of mudflows from Quebrada de Coquena of 7 March, 2007 and from Quebrada de Chalala of 29 March of the same year. These stream basins are tributary to the Quebrada de Purmamarca located in the Cordillera Oriental, Jujuy Province, Argentina. The studies focussed on the classification of the type of mass flow type and quantification of the magnitude of these events. Flow velocity was calculated using two different equations. Both methods produced similar results. Flow volume was measured directly in the field. The relationship between the total discharge (V) and the peak flow (Qp) was estimated by using equations for similar flows from the geotechnical literature. Maximum erosional yield was estimated using the JICA method. The probability of large destructive mudflows inundating the fans of these streams is very high (>1/20) and their magnitude is class 5: a volume greater than 105 m3. The flow velocity, volume and frequency calculated in this study are valuable for hazard mapping, the creation and placement of infrastructure, and land use planning.

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