期刊
VADOSE ZONE JOURNAL
卷 9, 期 2, 页码 268-277出版社
SOIL SCI SOC AMER
DOI: 10.2136/vzj2009.0099
关键词
-
资金
- University of Texas at Austin
Gravity-driven preferential flow paths (fingers) have been shown to be the result of nonmonotonic saturation profiles observed during constant-flux, one-dimensional infiltration. These nonmonotonic profiles, also known as saturation overshoot, cannot be described by traditional unsaturated continuum flow models, such as the Richards equation. Instead, continuum models require additional extensions, higher order in eithertime or space, which are still open to much question. In this study, an extensive data set was obtained on preferential flow and overshoot behavior in well-sorted sands. The overshoot behavior is the strongest evidence of dynamic effects in porous media because other reported experimental evidence can be the result of varying measuring volumes or media heterogeneities. Thus the extensive overshoot data set provides the best testing ground for the various proposed extensions, and the data set was compared with recently proposed continuum extensions to unsaturated flow models.
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