The hydraulic description of vegetated river channels: the weaknesses of existing formulations and emerging alternatives
The hydraulic description of vegetated river channels: the weaknesses of existing formulations and emerging alternatives
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DOI：
10.1002/wat2.1044
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发表时间：
2014-11
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影响因子：
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通讯作者：
T. Marjoribanks;R. Hardy;S. Lane
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文献类型：
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作者：
T. Marjoribanks;R. Hardy;S. Lane
目前，许多用于预测植被对河流流量影响的方法都存在以下一个或两个问题：（1）对物理基础较差且只能通过经验手段轻易确定的参数的强烈依赖； (2) 就其表示植被对流量的影响的方式而言，概念基础较差，尤其是在高维数值模型中。这限制了它们对超出基本水力预测（例如水位）到生态系统理解的问题的贡献。在这项研究中，我们展示了耦合生物力学-水力模型的使用如何可以大大改进对一系列明渠流动过程的表示。对假设植被冠层的初步实验正在产生非常令人鼓舞的结果，并且可能为在更高维度的数值模型中改进植被的表示提供手段，这可能会导致更好的论证和更可靠地识别洪水识别和栖息地特征所需的输送参数。电线水 2014 年，1：549–560。 doi：10.1002/wat2.1044
Currently, many of the methods used to predict the effect of vegetation on river flow suffer from one or both of the following problems: (1) a strong dependence on parameters that have a poor physical basis and which are only readily determined using empirical means; and (2) a poor conceptual basis, in terms of the way they represent the effects of vegetation on the flow, especially in higher dimensionality numerical models. This limits their contribution to problems that extend beyond basic hydraulic prediction (e.g., of water levels) to ecosystem understanding. In this study, we show how use of coupled biomechanical–hydraulic models may lead to a much‐improved representation of a range of open‐channel flow processes. Preliminary experiments over hypothetical vegetation canopies are producing very encouraging results and may provide the means for an improved representation of vegetation in higher dimensionality numerical models that may result in a better justification and more reliable identification of the conveyance parameters needed for both flood identification and the characterization of habitat. WIREs Water 2014, 1:549–560. doi: 10.1002/wat2.1044