DIAGNÓSTICO DE LA RELACIÓN ENTRE RECIPITACIONES Y LA OCURRENCIA DE PROCESOS DE REMOCIÓN EN MASA, EN EL MUNICIPIO DE PEREIRA, RISARALDA (COLOMBIA). PERÍODO 1964–2000
A DIAGNOSIS OF THE RELATIONSHIP BETWEEN RAINFALL AND THE OCCURRENCE OF MASS WASTING PROCESSES IN THE MUNICIPALITY OF PEREIRA, RISARALDA (COLOMBIA). 1964–2000

Author(s): Alejandro Alzate Buitrago, Gabriel Cruz Cerón
Subject(s): Geography, Regional studies
Published by: Wydawnictwa Uniwersytetu Warszawskiego
Keywords: rain; landslides; disasters; rainfall thresholds; mass removal processes
Summary/Abstract: From the historical inventory of landslides and climatological records of theMatecaña Airport Meteorological Station and the Treatment Plant Station (Empresa Aguasy Aguas de Pereira), it was possible to establish the relationship between the behaviorof rainfall and the susceptibility of occurrence of Landslides in the urban and suburbanperimeters of the municipality of Pereira, during the period 1964–2000. The investigativeexercise was supported in the systematization, evaluation and georeferencing of 348landslides associated with the occurrence of rains in the study region, allowing to establishthe relationship between previous rains as detonating agent of landslides. Throughthe investigation, it was possible to determine for the municipality of Pereira cumulativerainfall thresholds of 158 mm, 294 mm, 418 mm and 530 mm respectively for the areaof infl uence of the Matecaña Airport station, for periods of 15, 30, 45 and 60 days. Inthe same way, and for the same intervals, values of 171 mm, 299 mm, 421 mm and 552mm were obtained for the area of infl uence of the Treatment Plant station. It was alsopossible to estimate that the highest number of landslides (177 events) was associatedwith cumulative rainfall thresholds for the 15-day interval (158 mm), according to theresults of the present investigation.

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