Descloitres Marc auteur aut IRD Robain Henri auteur aut IRD Dabas M. auteur aut IRD Camerlynck C. auteur aut IRD Albouy Yves auteur aut IRD text conferencePaper fre text/pdf reformatted digital access The tropical soils systems cover more than 1/3 of the emerged earth. The knowledge of the shallow structures is crucial for the understanding of global pedological functioning of soils. Multifrequency radar and pole-pole multi-electrode DC resistivity surveys were conducted here along the 950 meters long main traverse of Nsimi watershed to delineate the main pedological horizons. The results of pole-pole survey are interpreted using RES2DINV software, which allows a rapid 2-D inversion. The resulting image shows the main structures from shallow depth to more than 80 meters deep. Features like major fault, bedrock topography or altered zones are clearly defined. In order to image the shallower part of the section, the radar and a more detailed electrical section are presented together and compared to dense pedological observations available on this traverse. In the first ten meters, the main radar reflectors at 25 MHz and iso-resistivity curves correlate themselves. This allows to give precise indications to the pedologist who can locate more accurately observation pits or borehole investigations as well as to give precise geometrical limits to pedo-hydrogeologic models. (Résumé d'auteur) specialized GEOPHYSIQUE RADAR PROFIL PEDOLOGIQUE HORIZON TYPOLOGIE CAMEROUN 066GPHGEN 068PROSOL Géophysique des Sols et des Formations Superficielles : Colloque GEOFCAN, Bondy (FRA), 1997/09/11-12 33-37 multigr. Albouy Yves ed. edt IRD Montoroi Jean-Pierre ed. edt IRD Tabbagh A. ed. edt IRD Zerbib Nicole ed. edt IRD Paris ORSTOM 1997 https://www.documentation.ird.fr/hor/fdi:010011223 [F A010011219] https://www.documentation.ird.fr/hor/fdi:010011223 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/geofcan/010011223.pdf IRD - Base Horizon / Pleins textes 1997-10-08 2018-05-02 fdi:010011223 fre