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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Post-fire bedload sediment delivery across spatial scales in the interior western United States
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Post-fire bedload sediment delivery across spatial scales in the interior western United States

机译：美国内陆地区火后的床载沉积物在空间尺度上的传递

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Post-fire sediment yields can be up to three orders of magnitude greater than sediment yields in unburned forests. Much of the research on post-fire erosion rates has been at small scales (100m~2 or less), and post-fire sediment delivery rates across spatial scales have not been quantified in detail. We developed relationships for post-fire bedload sediment delivery rates for spatial scales up to 117 ha using sediment yield data from six published studies and two recently established study sites. Sediment yields and sediment delivery ratios (SDRs; sediment delivered at the catchment scale divided by the sediment delivered from a plot nested within the catchment) were related to site factors including rainfall characteristics, area, length, and ground cover. Unit-area sediment yields significantly decreased with increasing area in five of the six sites. The annual SDRs ranged from 0.0089 to 1.15 and these were more closely related to the ratio of the plot lengths than the ratio of plot areas. The developed statistical relationships will help quantify post-fire sediment delivery rates across spatial scales in the interior western United States and develop process-based scaling relationships. Published in 2013. This article is a U.S. Government work and is in the public domain in the USA.
机译：火灾后的沉积物产量可能比未燃烧森林中的沉积物产量高三个数量级。关于火灾后侵蚀率的研究大多是小规模的（100m〜2或更小），并且尚未详细量化整个空间尺度的火灾后泥沙输送速率。我们使用来自六个已发表的研究和两个最近建立的研究地点的沉积物产量数据，为空间尺度高达117公顷的火后床载沉积物输送速率建立了关系。沉积物产量和沉积物输送比（SDR;以流域规模输送的沉积物除以从嵌套在流域内的样地输送的沉积物）与场地因素有关，包括降雨特征，面积，长度和地表覆盖率。六个地点中有五个地点的单位面积沉积物产量随面积的增加而显着下降。年度特别提款权的范围从0.0089到1.15，这与地积长度的比率比地积面积的比率更紧密相关。发达的统计关系将有助于量化美国西部内部各个空间尺度上的大火后泥沙输送速率，并建立基于过程的尺度关系。 2013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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