Prediction of soil water storage using temporal stability in different landscape positions on the northern loess plateau, China
Prediction of soil water storage using temporal stability in different landscape positions on the northern loess plateau, China
复制标题
基于不同景观位置时间稳定性的黄土高原北部土壤蓄水量预测，中国
DOI：
10.1002/hyp.14671
复制
发表时间：
2022-08
影响因子：
3.2
通讯作者：
Xuezhang Li;M. Shao;Xianli Xu
中科院分区：
文献类型：
--
作者：
Xuezhang Li;M. Shao;Xianli Xu
黄土高原等半干旱地区土壤贮水动态受多种因素的影响。由于黄土高原地形地貌的起伏性和破碎性，不同景观位置的SWS时空变化差异较大。然而，在不同的景观位置的SWS及其时间稳定性的信息是缺乏的。以黄土高原典型小流域为研究对象，选取了坡面、坝地和沟道景观位置。在每个景观位置设置28个样点的土壤水分观测带，利用12个样点的SWS数据进行时间稳定性分析。结果表明，土壤水分剖面的变化特征受景观位置的影响。不同景观位置土壤水分空间格局的持续性随土壤深度的增加而增强。在每一个景观位置上，代表性的地点可以准确地预测其SWS的时间稳定性分析的基础上。此外，在预测过程中，SWS在代表性位置的稳定性比其含量更重要。导致不同景观位置土壤时间稳定性差异的主导因素随土壤深度的变化而变化。研究结果为黄土高原小流域植被重建和水分管理提供了重要依据。
Soil water storage (SWS) dynamics are affected by many factors in semiarid regions such as the Loess Plateau. Spatiotemporal variation of SWS varies greatly with different landscape positions due to the rolling and fragmented terrain landscape of the Loess Plateau. However, information on the SWS and its temporal stability at different landscape positions is lacking. In this study, hillslope, dam land and gully landscape positions were selected in a typical small watershed in the Loess Plateau. A soil water observation belt with 28 sample locations was set up at each landscape position, and temporal stability analysis was conducted using SWS data of 12 sampling events. The results showed that the variation characteristics of profile SWS are influenced by landscape position. The persistence of spatial SWS patterns in different landscape positions increases with the increase of soil depth. On each landscape position, representative locations can accurately predict their SWS based on temporal stability analysis. Moreover, the stability of SWS at the representative locations was more important than its content during the prediction process. The dominant factors that lead to the difference of temporal stability characteristics in different landscape positions varied with the change in soil depths. The results provide an important basis for vegetation reconstruction and water management in small Loess Plateau watersheds.