Vertical variation of near-saturated hydraulic conductivity in three soil profiles

Vertical distribution of soil saturated hydraulic conductivity and its influencing factors in a small karst catchment in Southwest China

“…However, the vertical distribution of Ks in the soil profile is irregular at times. For example, among three cultivated soil profiles in France, Coquet et al (2005) found that Ks increased consistently with increasing soil depth in two of their soil profiles while first increased then begun to show decrease as soil depth increased in the third profile. Schwen et al (2014) found an increasing trend in the vertical distribution of soil hydraulic conductivity in farmlands but some fluctuation with a maximum value at 50 cm depth in forestland in Austria.…”

“…Numerous previous studies focused on the spatial variability of Ks in the surface soil from hillslope scale to regional scale (Sobieraj et al 2002;Lewis et al 2011;Gao et al 2012). However, only occasionally did previous studies address the vertical distribution of Ks in the soil profile (Coquet et al 2005;Schwen et al 2014). Many hydrological modeling studies suggested that Ks decreased with increasing soil depth and, in addition, a reduction factor was used as a parameter in the model (Güntner et al 1999;Ibbitt and Woods 2004;Hwang et al 2012).…”

Qualidade físico-hídrica e rendimento de soja (Glycine max L.) e feijão (Phaseolus vulgaris L.) de um Argissolo Vermelho distrófico sob diferentes sistemas de manejo

“…A condutividade hidráulica, apesar de ser um indicador variável, pode também revelar diferenças entre sistemas de manejo (COQUET et al, 2005). O incremento da pressão aplicada por máquinas agrícolas pode reduzir os valores de condutividade hidráulica de solo saturado (HORN et al, 2003), corroborando os resultados de OSUNBITAN et al (2005).…”

Statut poral des sols cultives dans la zone cotonniere ouest du Burkina Faso

“…Cette observation est en accord avec les résultats de travaux de Vauclin et Chopart (1992), réalisés au Nord de la Côte d'Ivoire, qui ont montré que les labours contribuaient à créer un nombre plus élevé de pores fonctionnels de taille réduite, 20 -30 µm de diamètre. L'ensemble de ces modifications induites par le travail du sol dans la morphologie et la distribution du réseau des pores est également confirmé par de récents travaux (Hangen et al, 2002 ;Wahl et al, 2004 ;Coquet et al, 2005 ;. D'une façon générale, le spectre poral de toutes les parcelles labourées se caractérise par l'existence de deux familles de pores.…”