Collaborative Research: Sediment connectivity and its morphologic and vegetative controls: Linking soils and streams in mountain landscapes of the northern Rockies

合作研究：沉积物连通性及其形态和植物控制：连接落基山脉北部山地景观中的土壤和溪流

基本信息

批准号：
1644624
负责人：
Jean Dixon
金额：
$ 29.63万
依托单位：
Montana State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-01-01 至 2022-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1644624&HistoricalAwards=false
关键词：
Collaborative Research Sediment connectivity its

项目摘要

Sediment movement across mountain watersheds influences landscape evolution, ecosystem function, and resource management, yet quantitative understanding of sediment connectivity between hillslopes, streams, and downstream is limited. This project will advance understanding of the pace and patterns of and controls on sediment routing and connectivity in mountain watersheds. The resulting process knowledge will be relevant to management and restoration in forested, fire-prone mountain landscapes, as well as to assessment of aquatic habitat in mountain streams and vulnerability to sediment-related disturbances and climate change. Outreach efforts will include development and delivery of webinars targeted toward K-12 teachers, an interactive science-museum exhibit, and dissemination via digital educational resources. The project will also educate and train university students at the undergraduate and graduate levels.This project will investigate the influences of topography and vegetation on sediment transfer, residence time, and connectivity between hillslopes, streams, and downstream through river networks. Semiarid, snowmelt-dominated, fire-prone landscapes will be targeted. Measurements of erosion and sediment transport at different scales, using isotopic and physical tracers, will be combined with high-resolution topographic data and modeling of sediment storage, mixing, and routing. The project will fill knowledge gaps surrounding multi-scale erosion rates and processes in mountain landscapes by bridging hillslope and fluvial analyses, combining diverse and cutting-edge tools, and incorporating ecogeomorphic perspectives about the influence of vegetation on sediment transfer.

山区流域的沉积物运动影响景观演变、生态系统功能和资源管理，但对山坡、溪流和下游之间沉积物连通性的定量了解有限。该项目将增进对山区流域沉积物路径和连通性的速度、模式和控制的了解。由此产生的过程知识将与森林覆盖、易发生火灾的山地景观的管理和恢复相关，以及对山间溪流中的水生栖息地的评估以及对沉积物相关干扰和气候变化的脆弱性的评估。外展工作将包括开发和举办针对 K-12 教师的网络研讨会、互动科学博物馆展览以及通过数字教育资源进行传播。该项目还将教育和培训本科生和研究生。该项目将研究地形和植被对沉积物转移、停留时间以及山坡、溪流和下游通过河流网络之间的连通性的影响。半干旱、融雪为主、易发生火灾的地区将成为目标。使用同位素和物理示踪剂测量不同尺度的侵蚀和沉积物输送，将与高分辨率地形数据和沉积物储存、混合和路径建模相结合。该项目将通过连接山坡和河流分析，结合多样化和尖端的工具，并结合植被对沉积物转移影响的生态地貌观点，填补有关山地景观多尺度侵蚀率和过程的知识空白。