RAPID: Continuous Measurement of Sediment Transport and Hydraulic Conditions in a Mountain Stream Prior to Wood Placement

RAPID：在木材放置之前连续测量山间溪流中的沉积物输送和水力状况

• 批准号: 1247003
• 负责人: Stephen Lancaster
• 金额: $ 2.56万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-01 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1247003&HistoricalAwards=false
• 关键词: RAPID; Continuous; Measurement; Sediment; Transport; RAPID; Continuous; Measurement; Sediment; Transport

This project will study river bedload transport dynamics prior to and following placement of large woody debris (LWD) in the Siuslaw National Forest in the Oregon Coast Range. The team will instrument bedload with passive integrated transponder tags and track their movements prior to emplacement of the LWD. Recent news that no other such projects are currently scheduled or proposed in this National Forest, in addition to the accessibility of the site, creates urgency and opportunity to capture the pre-emplacement sediment dynamics under a range of conditions. The study will (a) provide fundamental, and rare, information regarding bed material sediment transport in field conditions, information that will serve as a valuable reference point for evaluating sediment transport relations based on flume and engineered-stream studies; (b) address the sensitivities of mountain stream sediment transport to downstream debris characteristics and upstream supply limitations; and (c) determine whether grain-size dependence of transport is accentuated or dampened by debris and other channel irregularities.This project will provide rarely obtained data that will inform not only theoretical understanding of sediment transport in mountain streams, but also stream restoration practitioners about the impacts of LWD placement. One application of LWD is for managing salmonid habitats. The team will interact with National Forest scientists and practitioners in the Pacific NW.

该项目将在俄勒冈州海岸山脉的Siuslaw国家森林中放置大型木质碎片（LWD）之前和之后研究河床运输动力。 该团队将使用被动集成的应答器标签来仪器床负载，并在安置LWD之前跟踪其动作。 最近的消息称，除了该网站的可及性外，目前没有其他此类项目被安排或提议，还创造了在各种条件下捕获预先置换前的沉积物动力学的机会。 该研究将（a）提供有关在田间条件下床材料沉积物传输的基本且罕见的信息，这些信息将作为评估基于水槽和工程流程研究的沉积物传输关系的宝贵参考点； （b）解决山流沉积物传输到下游碎屑特征和上游供应限制的敏感性； （c）确定是否会因碎屑和其他渠道不规则性而突出或抑制运输的差异。该项目将提供很少获得的数据，不仅可以为山流中的沉积物传输的理论理解提供信息，还可以为河流恢复从业人员提供有关LWD放置影响的影响。 LWD的一种应用是用于管理鲑鱼栖息地。 该团队将与西北太平洋地区的国家森林科学家和从业人员进行互动。