Dissertation Research: Landscape Controls on Stream ChannelResponse to Floods in a 5th Order Watershed in the Western Oregon Cascades

俄勒冈州立大学的博士论文研究将使用来自H.J. Andrews LTER站点的独特长期数据集来测试关于山间溪流形态控制的主要假设。分层研究设计包括通过表征河道形态，将河道响应与河流过程联系起来，以及在与地貌背景相关的横截面上解释河道形态和对洪水的响应，从河道单位尺度扩大。这项工作还将评估地貌阈值作为渠道响应类型和大小的预测因子。将利用现有的数据库，其中包括1978年至1996年期间的1400多个横截面测量值。额外的工作将补充这个数据库。观察到的河道/谷底响应与景观结构和条件指数之间的关系将使用GIS分析进行探讨。结果将提供一个更好的理解山溪流的渠道动力学，这是在理论意义上至关重要的，也为工程结构的选址和设计。

John M Faustini Oregon State University The doctoral dissertation research will test dominant hypotheses about controls on mountain stream channel morphology using unique long term data sets from the H.J. Andrews LTER site. The hierarchical study design involves scaling up from the channel unit scale by characterizing channel morphology, relating channel response to fluvial processes, and interpreting channel morphology and response to floods at cross-section sites in relation to geomorphic context. The work will also evaluate geomorphic thresholds as predictors of the type and magnitude of channel response. Use will be made of an existing data base of over 1400 cross section measurements spanning the period from 1978 to 1996. Additional work will supplement this data base. The relationship between observed channel/valley floor responses and indices of landscape structure and condition will be explored using a GIS analysis. The results will provide an improved understanding of mountain stream channel dynamics which is critical in a theoretical sense but also for siting and design of engineered structures.