Width of streams and rivers in response to vegetation, bank material, and other factors
Width of streams and rivers in response to vegetation, bank material, and other factors
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DOI：
10.1111/j.1752-1688.2004.tb01576.x
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发表时间：
2004-10-01
影响因子：
2.4
通讯作者：
Hession, WC
中科院分区：
文献类型：
--
作者：
Anderson, RJ;Bledsoe, BR;Hession, WC
分析了一组广泛的数据集，以检查影响溪流和河流宽度的因素。结果表明，植物对河道大小的控制与尺度有关。在流域宽度大于10至100公里(2)的河道中，河岸有茂密的木本植被的河道比河岸有草或无林的河道窄。在较小的河流中则相反，这显然是由于木屑、遮阳、林下植被、根系特征和河道大小之间的相互作用。介绍了一种基于树的统计方法（回归树），并测试了它作为识别响应阈值和解释变量之间相互作用的工具。在稳定河道设计方法和区域水力几何曲线发展的背景下，讨论了尺度相关控制对河道宽度的影响。
An extensive group of datasets was analyzed to examine factors affecting widths of streams and rivers. Results indicate that vegetative controls on channel size are scale dependent. In channels with watersheds greater than 10 to 100 km(2) widths are narrower in channels with thick woody bank vegetation than in grass lined or nonforested banks. The converse is true in smaller streams apparently due to interactions between woody debris, shading, understory vegetation, rooting characteristics, and channel size. A tree based statistical method (regression tree) is introduced and tested as a tool for identifying thresholds of response and interpreting interactions between variables. The implications of scale dependent controls on channel width are discussed in the context of stable channel design methods and development of regional hydraulic geometry curves.