Profile characteristics of temporal stability of soil water storage in two land uses
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ORIGINAL PAPER
Profile characteristics of temporal stability of soil water storage in two land uses She Dongli & Liu Dongdong & Liu Yingying & Liu Yi & Xu Cuilan & Qu Xin & Chen Fang
Received: 10 October 2012 / Accepted: 11 January 2013 # Saudi Society for Geosciences 2013
Abstract Information on soil water storage (SWS) within soil profiles is essential in order to characterize hydrological and biological processes. One of the challenges is to develop low cost and efficient sampling strategies for area estimation of profile SWS. To test the existence of certain sample locations which consistently represent mean behavior irrespective of soil profile wetness, temporal stability of SWS in ten soil layers from 0 to 400 cm was analyzed in two land uses (grassland and shrub land), on the Chinese Loess Plateau. Temporal stability analyses were conducted using two methods viz. Spearman rank correlation coefficient (rs) and mean relative differences. The results showed that both spatial variability and time stability of SWS increased with increasing soil depth, and this trend was mainly observed at above 200 cm depth. High rs (p
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