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Browsing by Author Qiao, J.

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  • Capacity and Distribution of Water Stored in the Vadose Zone of the Chinese Loess Plateau

    • Authors: Zhu, Y.;  Advisor: -;  Participants: Jia, X.; Qiao, J.; Binley, A.; Horton, R.; Hu, W.; Wang, Y.; Shao, M. (2019)

  • Water stored in the vadose (unsaturated) zone provides the majority of water required by plants and buffers water resources; thus, it is central to understanding ecological and hydrological processes in the Chinese Loess Plateau (CLP) with its thick loess deposits. We used multisource data on soil water content (SWC) and vadose zone thickness, combined with a spatial interpolation method, to quantify the vadose zone water and further deduce the water resource composition in the CLP. Vadose zone water is approximately 3.1 × 1012 m3 (±27.5%) in the CLP, 92.4% of which is stored in the deep vadose zone (>5 m and above the groundwater table). The water resources composition of the CLP com...
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  • Factors that Influence the Vertical Distribution of Soil Water Content in the Critical Zone on the Loess Plateau, China

    • Authors: Qiao, J.;  Advisor: -;  Participants: Zhu, Y.; Jia, X.; Huang, L.; Shao, M. (2018)

  • The results showed that the SWC variations at the five sampling sites tended to become weak as the depth increased. The mean SWC of all sampling sites exhibited a decreasing trend from south to north, with a significant difference (P < 0.01). Stepwise multiple regression analysis and state‐space modeling showed that the BD was an important factor that affected the variations in the SWC in the deep soil layer. The trend of vertical distribution of the SWS was similar to that of the SWC. The results of this study deepen our understanding of the water conditions in deep soil layers, as well as the evaluation of SWS on the Loess Plateau in China.