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Medida entre un punto en la zona de desgarre y un punto a lo largo de la vía, la pendiente porcentual es de 33,66%. Los datos topográficos permitieron determinar la pendiente media de la zona fracturada. El análisis de los datos provistos por el penetrómetro ha permitido predecir que la interfaz de superficie fracturada entre el basamento y los sedimentos está a una profundidad entre 2,00 y 12,20 m. El propósito del trabajo es conocer nuevos rasgos topográficas del sitio, y con el penetrómetro predecir la profundidad a la que está la potencial superficie de ruptura debajo del área afectada. Se hicieron un levantamiento topográfico y un ensayo con penetrómetro dinámico de cono (DCPT) sobre el área de deslizamiento Kekem. Keywords: Landslide, national road N★, kekem, topographic, penetrometer test Considering the steepness ofthe slope and the thickness ofthe sediments, the site remains dangerous for the populations especiallyduringthe rainyseason. 2D contours map drawn with the Surfer software, over an area of 35 hectares has enabled the observation of a step gradient oriented NNE-SSW. The slope percentage gives 33.66% from a point taken over the tearing niche and a point along the road. The topographic data was used to determine the average slope percentage over the broken area. The analysis of penetrometer data has led to the supposition that the fracturedsurface interface connectingthe basement andsediments has adepthofbetween 2.00 mand 12.20 m. The aim ofthe work was to unveil new topographic features ofthe site, and with the penetrometer soundings predict the depth of the potential rupture surface beneath the damaged area. Box 6052 Yaoundé-Cameroon E-mail: received: 20 -05- 2010 Accepted for publication: 30-11-2010Ītopographicalsurveyandadynamiccone penetrometertesting(DCPT)wereconductedoverthe Kekemlandslide area. Box 812 Yaounde-CameroonĢ Geotech-Consulting Cameroon, Office of Geophysical Studies and Services, P.O. Jean Jacques Nguimbous-Kouoh 1,2 andEliezer Manguelle-Dicoum 1,2ġ Department of Physics, Faculty of Science, University of Yaounde I, P.O. Contribution of topographic and penetrometric measurements to a site characterization, case of the Kekem Landslide, National Road N★ (Western Cameroon)