ROLE OF ROCK POROSITY IN WATER TRANSFER A ND SOIL-MOISTURE REGIME

Authors
BRUCKERT S GAIFFE M
Citation
S. Bruckert et M. Gaiffe, ROLE OF ROCK POROSITY IN WATER TRANSFER A ND SOIL-MOISTURE REGIME, Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre, 316(10), 1993, pp. 1455-1461
Citations number
15
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre → ACNP
ISSN journal
07644450
Volume
316
Issue
10
Year of publication
1993
Pages
1455 - 1461
Database
ISI
SICI code
0764-4450(1993)316:10<1455:RORPIW>2.0.ZU;2-P
Abstract
The field saturated hydraulic conductivity Ks and the water matric pot ential of two soil-rock systems were studied in relation to the porosi ty of rocks. High Ks (35 to 65 x 10(-6) ms-1) were observed on the two sites, the calcareous bedrocks being fractured. Large variations of m atric potential were observed between wet and dry periods within subso il near rocks with high fine porosity and little variation near rocks without fine porosity. The first rocks induce high suction (pF > 4.5) and water movement from soil to bedrock; the second rocks do not induc e suction, so that profiles dried from the soil surface.