Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR029170 |
Dynamic hillslope soil moisture in a Mediterranean montane watershed | |
Salli F. Dymond; Joseph W. Wagenbrenner; Elizabeth T. Keppeler; Kevin D. Bladon | |
2021-11-02 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | Variations in hillslope soil moisture control forest hydrologic fluxes and storage pools, yet sparse observations combined with the complexity and heterogeneity of water movement and storage in the vadose zone can make temporal and spatial patterns and processes difficult to predict. We used two years of field observations of volumetric soil moisture at three depths (15, 30, and 100 cm) across five topographic positions (riparian, toeslope, sideslope, shoulder, and ridge) along three hillslope transects to better understand how soil moisture changes with hillslope position and through time. As expected, we found higher values of soil moisture at all depths at the riparian and toeslope positions. Unexpectedly, we found that ridges were particularly wet during the wet winter months and dried quickly during the summer months, indicating that topography alone cannot account for mean wet season soil moisture in our Mediterranean-climate field site. The variability in soil moisture across all soil depths and topographic positions was greatest when soils were dry and decreased under wet soil conditions; this variability remained high in the deeper soil horizons, regardless of season. Lastly, event-analysis suggests that the response to early-season rainfall was highly variable along the hillslopes and was likely dominated by localized controls such as micro-topography and vegetation as well as soil texture, antecedent moisture conditions and rainfall characteristics. Our results suggest that the drivers of wet and dry season soil moisture dynamics can vary across topographic positions along a hillslope and do not always follow topographic controls. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/341154 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Salli F. Dymond,Joseph W. Wagenbrenner,Elizabeth T. Keppeler,et al. Dynamic hillslope soil moisture in a Mediterranean montane watershed[J]. Water Resources Research,2021. |
APA | Salli F. Dymond,Joseph W. Wagenbrenner,Elizabeth T. Keppeler,&Kevin D. Bladon.(2021).Dynamic hillslope soil moisture in a Mediterranean montane watershed.Water Resources Research. |
MLA | Salli F. Dymond,et al."Dynamic hillslope soil moisture in a Mediterranean montane watershed".Water Resources Research (2021). |
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