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首页> 外文期刊>Journal of the American Water Resources Association >A TWO-DECADE WATERSHED APPROACH TO STREAM RESTORATION LOG JAM DESIGN AND STREAM RECOVERY MONITORING: FINNEY CREEK, WASHINGTON
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A TWO-DECADE WATERSHED APPROACH TO STREAM RESTORATION LOG JAM DESIGN AND STREAM RECOVERY MONITORING: FINNEY CREEK, WASHINGTON

机译：流量恢复对数卡纸设计和流量恢复监控的十年分水岭方法：华盛顿特区芬妮克雷克

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摘要

A federal, state, and private partnership leveraged resources and employed a long-term, systematic approach to improve aquatic habitat degraded by decades of intensive forest management in Finney Creek, a tributary to the Skagit River of Northwest Washington State. After more than a decade of work to reduce sediment sources and the risk of landslides within the watershed, log jam installation commenced in 1999 and progressed downstream through 2010. Log jam design was adapted as experience was gained. A total of 181 log jams, including 60 floating log ballasted jams, were constructed along 12 km of channel. The goal was to alter hydraulic processes that affect aquatic habitat formation along 39 km of stream with emphasis on 18.5 km of lower Finney Creek. Aquatic habitat surveys over a five-year period show an increase in the area of large pools and an accompanying increase in residual and maximum pool depth in the lower river reach. Channel cross sections show a generally deeper channel at the log jams, better channel definition in the gravel deposits at the head of the log jams, and improved riffle and thalweg development below the log jams. Stream temperature in the upper river decreased Jay. 1.0°F in the first three years, and 1.1°F in the lowest treated reach over nine years. There is a trend of less stream heating over the restoration time period. Photo points show that riparian vegetation is recolonizing gravel bars.
机译：联邦，州和私人合作伙伴利用资源并采取了长期，系统的方法，以改善因芬尼河（数十年来对华盛顿州西北部斯卡吉特河的支流）的密集森林管理而退化的水生栖息地。为减少沉积物来源和流域内的滑坡风险进行了十多年的工作后，原木堵塞安装工作于1999年开始，并一直持续到2010年下游。随着经验的积累，对原木堵塞设计进行了调整。沿着12公里的航道共建造了181座原木果酱，包括60块浮动原木压载果酱。目标是改变影响39公里溪流水生生境形成的水力过程，重点是下芬尼河18.5公里。五年期间的水生生境调查显示，大型水池的面积增加了，下游河段的残余和最大水池深度也随之增加。河道横截面显示出在原木堵塞处通常较深的河道，在原木堵塞顶部的砾石沉积物中具有更好的河道清晰度，并改善了原木堵塞下方的浅滩和海藻发育。上游河流的溪流温度降低了杰伊。前三年的温度为1.0°F，而经过9年治疗的最低温度范围为1.1°F。在恢复时间段内，溪流加热的趋势是减少。照片点表明，河岸植被正在使砾石重新定殖。

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