Temporal stability of soil water storage in diverse soil layers

Auteur(s) et Affiliation(s)

GAO, L.

State Key Lab. of Soil Erosion and Dryland Farming on the Loes Plateau, Inst. of Soil and Water Conservation, CAS, Univ., Yangling, Chine

Graduate Univ. of Chinese Academy of Sciences, Beijing, Chine

SHAO, M.

Key lab. of Ecosystem Network Observation and Modeling, Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing, Chine

Description :
Knowledge of soil water storage (SWS) within soil profiles is crucial when selecting appropriate practices for the restoration of vegetation. To study the temporal stability of SWS and identify representative locations in diverse soil layers, an analysis of temporal stability was performed using Spearman rank correlation coefficients and relative differences. From July 2008 to October 2010, the SWS of 3 soil layers (0-1, 1-2, and 2-3 m) were measured using a neutron probe at 91 locations on a hillslope on the Loess Plateau, China. The results showed that the variability of SWS decreased over time and increased over space with the increase in soil depth. With increasing soil depth, more locations were able to estimate the mean SWS of the area. None, however, represented the mean values for all three soil layers separately.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2012, vol. 95, p. 24-32, nombre de pages : 9, Références bibliographiques : 49 ref.

Date :
2012

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais