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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Characteristics of concentrated flow hydraulics for rangeland ecosystems: Implications for hydrologic modeling
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Characteristics of concentrated flow hydraulics for rangeland ecosystems: Implications for hydrologic modeling

机译：牧场生态系统的集中流动水力特性：对水文建模的启示

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Concentrated flow is often the dominant source of water erosion following disturbance on rangelands. Because of the lack of studies that explain the hydraulics of concentrated flow on rangelands, cropland-based equations have typically been used for rangeland hydrology and erosion modeling, leading to less accurate predictions due to different soil and vegetation cover characteristics. This study investigates the hydraulics of concentrated flow using unconfined field experimental data over diverse rangeland landscapes within the Great Basin Region, United States. The results imply that the overall hydraulics of concentrated flow on rangelands differ significantly from those of cropland rills. Concentrated flow hydraulics on rangelands are largely controlled by the amount of cover or bare soil and hillslope angle. New predictive equations for concentrated flow velocity (R ~2=0·47), hydraulic friction (R ~2=0·52), and width (R ~2=0·4) representing a diverse set of rangeland environments were developed. The resulting equations are applicable across a wide span of ecological sites, soils, slopes, and vegetation and ground cover conditions and can be used by physically-based rangeland hydrology and erosion models to estimate rangeland concentrated flow hydraulic parameters. Published in 2011 by John Wiley and Sons, Ltd. This article is a US Government work and is in the public domain in the USA.
机译：在牧场受到干扰之后，集中水流通常是水蚀的主要来源。由于缺乏解释牧场集中流水力的研究，因此通常基于农田的方程式被用于牧场水文和侵蚀模型，由于不同的土壤和植被覆盖特性，导致预测准确性较差。这项研究使用美国大盆地地区内各种牧场景观的无限制现场实验数据来研究集中水流的水力。结果表明，牧场上的集中水流的总体水力与农田小溪的水力显着不同。牧场上的集中流水力很大程度上受覆盖或裸土的数量以及山坡角度的控制。建立了代表不同牧场环境的集中流速（R〜2 = 0·47），水力摩擦（R〜2 = 0·52）和宽度（R〜2 = 0·4）的新预测方程。所得方程可适用于广泛的生态场所，土壤，斜坡，植被和地面覆盖条件，并可用于基于物理的牧场水文和侵蚀模型来估算牧场集中流水力参数。约翰·威利父子有限公司（John Wiley and Sons，Ltd）于2011年出版。本文是美国政府的工作，在美国属于公共领域。

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