期刊
HYDROLOGICAL PROCESSES
卷 23, 期 9, 页码 1295-1312出版社
JOHN WILEY & SONS LTD
DOI: 10.1002/hyp.7237
关键词
hillslope hydrology; surface runoff generation; variable source area; landscape position; fragipan; agriculture
The variable Source area (VSA) concept provides the underlying paradigm for managing phosphorus losses in runoff in the north-eastern USA. This study sought to elucidate factors controlling runoff along two hillslopes with contrasting soils, including characterizing runoff generation mechanisms and hydrological connectivity. Runoff monitoring plots (2 m x 1 m) were established in various landscape positions. Footslope positions were characterized by the presence of a fragipan that contributed to seasonally perched water tables. In upslope positions without a fragipan, runoff was generated primarily via the infiltration-excess (IE) mechanism (96% of events) and was largely disconnected from downslope runoff. Roughly 80% of total runoff originated from the north footslope landscape position via saturation-excess (SE) (46% of events; 62% of runoff) and IE (54% of events 38% of runoff) mechanisms. Runoff from the north hillslope was substantially greater than the south hillslope despite their proximity, and apparently was a function of the extent of fragipan representation. Results demonstrate the influence Of Subsurface soil properties (e.g. fragipan) oil Surface runoff generation in variable Source area hydrology settings, which could be useful for improving the accuracy of existing runoff prediction tools. Published in 2009 by John Wiley & Sons, Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据