@article{fdi:010012047,
  title = {{A} multiscale electrical survey of a lateritic soil system in the rain forest of {C}ameroon},
  author = {{R}obain, {H}enri and {D}escloitres, {M}arc and {R}itz, {M}ichel and {A}tangana {Q}.{Y}.},
  editor = {},
  language = {{ENG}},
  abstract = {{R}esistivity investigations were carried out on an elementary watershed in {SW} {C}ameroon, firstly to assess the applicability of direct-current ({DC}) resistivity methods to solve various pedological problems in intertropical regions, and subsequently to determine the relation ships between electrical resistivities and pedological properties of lateric soil systems. {T}he survey included measurements in pits with a small {W}enner fixed-spacing array ({SWA}), vertical electrical soundings ({VES}) and using a conventional multilayer inversion program to obtain best-fit models. {C}onstraints to the interpretation of these data were provided by {SWA} and pedological information from existing observation pits. {T}he results of the interpretation reveal five distinct geoelectrical layers overlying a resistive bedrock. {T}he first is a thin organo-mineral upper layer with low resistivities in the range 250-450 ohmm. {T}he second layer correspond to micro-aggregated clayey materials and is more resistive (1300-1800 ohmm). {T}he third represents the main part of ferruginous materials and is even more resistive (2000-4500 ohmm). {T}he fourth corresponds to unsaturated saprolite and the last to saturated saprolite (ground water) with resistivities ranging from 800 to 1500 ohmm and from 150 to 250 ohmm, respectively. {E}stimates of soil volumes for the entire study area were obtained from {VEQS} interpretations. {M}ost of the soil cover corresponds to saprolite (74%, 1/4 being saturated by ground water), while topsoil and ferruginous materials represent 14 and 12%, respectively. {F}inally, geophysical results based upon 1-{D} inversion provide a satisfactory approximation of the various lateritic components' 3-{D} geometry over the watershed. {T}he study provides original quantitative results concerning the behaviour of intertropical soil systems as well as some geomorphological keys for soil mapping at a regional scale. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{GEOPHYSIQUE} ; {SOL} ; {FORET} {DENSE} ; {LATERITE} ; {RESISTIVITE} ; {SONDAGE} {ELECTRIQUE} ; {RESULTAT} {ANALYTIQUE} ; {CAMEROUN} {SUD}},
  booktitle = {},
  journal = {{J}ournal of {A}pplied {G}eophysics},
  volume = {34},
  numero = {},
  pages = {237--253},
  ISSN = {0926-9851},
  year = {1996},
  DOI = {10.1016/0926-9851(95)00023-2},
  URL = {https://www.documentation.ird.fr/hor/fdi:010012047},
}