%0 Conference Proceedings
%9 ACTI : Communications avec actes dans un congrès international
%A Montoroi, Jean-Pierre
%A Bellier, Gérard
%A Larvy Delarivière, Jean
%T Détermination de la relation résistivité électrique - teneur en eau au laboratoire : application aux sols de Tunisie centrale
%S Géophysique des sols et des formations superficielles : abstracts et résumés étendus
%C Paris
%D 1997
%E Albouy, Yves
%E Montoroi, Jean-Pierre
%E Tabbagh, A.
%E Zerbib, Nicole
%L fdi:010011233
%G FRE
%I ORSTOM
%K SOL ; SALINITE ; MESURE AU LABORATOIRE ; RESISTIVITE ; HUMIDITE DU SOL
%K TUNISIE CENTRE
%P 153-159 multigr.
%U https://www.documentation.ird.fr/hor/fdi:010011233
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/geofcan/010011233.pdf
%W Horizon (IRD)
%X A laboratory experiment is carried out in order to determine the relationship electrical conductivity (R) versus water content (Hp) for 13 soils sampled in a central Tunisia watershed. As water content increases, electrical resistivity decreases following an exponential law R = a(e(exp b/Hp)). The a regression parameter is correlated with the particle size distribution allowing to classify the soil samples. This parameter decreases with clay and silt content and increases with sand content. During a field survey, soils are at different water contents and this variability must be taking in account. When the relationship R versus Hp is known, we calculate the R0,2 value which is the electrical resistivity at a reference water content proposed as 0,20 g/g. If the relationship is unknown, we can measure at two given periods two couples (R, Hp), determine a, b parameters considering an arbitrary exponential law and then obtain the R0,2 value. (Résumé d'auteur)
%B Géophysique des Sols et des Formations Superficielles : Colloque GEOFCAN
%8 1997/09/11-12
%$ 068ANASOL