GSTDTAP  > 资源环境科学
DOI10.1029/2020WR028343
The Influence of Local and Nonlocal Factors on Soil Water Content in a Steep Forested Catchment
Karla M. Jarecke; Kevin D. Bladon; Steven M. Wondzell
2021-04-24
发表期刊Water Resources Research
出版年2021
英文摘要

Surface topography can influence flow pathways and the location of runoff source areas and water transport in steep headwater catchments. However, the influence of topography on spatial patterns of residual soil moisture is less well understood. We measured soil volumetric water content (VWC) on 14 dates at 0–30 and 30–60 cm depth at 54 sites on a steep, 10‐ha north‐facing forested slope in the west‐central Cascades Mountains of Oregon, USA. Spatial patterns in VWC were persistent over time, and contrary to expectations—VWC at 30–60 cm depth was greater on divergent than convergent slopes, especially during wet periods (R2 = 0.27, p < 0.001). Vegetation characteristics were assessed for all VWC monitoring locations and soil properties were determined for 13 locations as local factors that affect spatial patterns in VWC. Mean VWC over all dates was negatively correlated to gravimetric rock content (R2 = 0.28, p = 0.03) and positively correlated to water storage at field capacity (R2 = 0.56, p < 0.01). The variability in rock content in quick‐draining soils influenced soil‐water retention, and by extension, created spatially heterogenous but temporally persistent patterns in VWC. While spatial patterns were persistent, they were not easily explained by surficial topography in a steep, mountainous landscape with rocky, well‐drained soils. Further research is needed to understand if combined soil‐terrain metrics would be a more useful proxy for VWC than terrain‐based wetness metrics alone.

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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/324023
专题资源环境科学
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GB/T 7714
Karla M. Jarecke,Kevin D. Bladon,Steven M. Wondzell. The Influence of Local and Nonlocal Factors on Soil Water Content in a Steep Forested Catchment[J]. Water Resources Research,2021.
APA Karla M. Jarecke,Kevin D. Bladon,&Steven M. Wondzell.(2021).The Influence of Local and Nonlocal Factors on Soil Water Content in a Steep Forested Catchment.Water Resources Research.
MLA Karla M. Jarecke,et al."The Influence of Local and Nonlocal Factors on Soil Water Content in a Steep Forested Catchment".Water Resources Research (2021).
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