Hydraulic relationships and depth measurements in the model evaluation of Stage 0 treatment on juvenile spring Chinook in the South Fork McKenzie River, Oregon

Low-tech river habitat restoration techniques, including Stage 0 treatments, are increasingly applied but often lack robust evaluation of their effects and benefits. In 2018, one kilometer of the South Fork McKenzie (SFMK) River OR was modified to Stage 0 conditions for the benefit of ESA-listed Chinook salmon by raising the incised channel to the geomorphic grade line, reconnecting relic side channels, increasing floodplain connectivity, and distributing large wood throughout the reach. Field observations indicated depths and velocities were lower at the treated site than at the untreated site. To understand how these changes in physical habitat may translate into changes in juvenile Chinook length, abundance, and emigration timing, this study combined field observations with the individual-based model inSALMO. This dataset provides the field observations of HOBO depth measurements and their locations, as well as hydraulic relationships of discharge and depth, and discharge and velocity. The relationships were developed based on both point measurements of velocity with an ADV and point measurements of depth using a staff gauge and continuous HOBO depth data.

低技术河流生境修复技术（包括Stage 0修复方案）的应用日益广泛，但相关研究往往缺乏对其实施效果与生态效益的严谨评估。2018年，美国俄勒冈州麦肯齐河南支流（South Fork McKenzie, SFMK）一段长1公里的河段被改造为Stage 0生境，以服务于列入《濒危物种法案》（Endangered Species Act, ESA）的奇努克鲑鱼保护：通过将下切河道抬升至地貌基准线，重新连通残存的支汊，提升河漫滩连通性，并在全河段投放大型枯木。野外监测结果显示，修复河段的水深与流速均低于未修复的对照河段。为厘清物理生境的上述变化将如何作用于奇努克幼鲑的体长、种群丰度以及入海洄游时间，本研究将野外监测数据与基于个体的模型inSALMO相结合。本数据集涵盖霍博（HOBO）水深测量数据及其对应监测点位的野外记录，同时包含流量-水深、流量-流速两类水力关系数据。上述水力关系的构建依托声学多普勒流速仪（Acoustic Doppler Velocimeter, ADV）的单点流速测量、水位尺的单点水深测量，以及连续式HOBO水深监测数据。