Analysis of River Restoration Hydrologic Function: Meadows as Macro-Hyporheic Zones

河流恢复水文功能分析：草甸作为宏观地势带

• 批准号: 0337393
• 负责人: Steven Gorelick
• 金额: $ 29.68万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-02-15 至 2008-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0337393&HistoricalAwards=false
• 关键词: Analysis; River; Restoration; Hydrologic; Function

Gorelick0337393The emerging effort to rebuild spoiled ecosystems often involves river restoration. Such hydroecological intervention aims to return each degraded terrestrial environment to a more natural state. Although river restoration has been initiated in various environments in recent years, there are few tools to track, quantifying, and evaluate hydrologic changes over space and time. This proposal involves a comparative analysis of degraded meadows and those in which river restoration has been conducted to mimic the natural environment in the Feather River watershed in northern California. The Feather River watershed was targeted because it is accessible and contains single-river meadows where the channels have been relocated as part of restoration efforts. The remaining degraded meadows have deeply incised river channels and dry grassland vegetation. Our goal is to develop an approach to quantitatively assess river restoration in small meadows. We plan to conduct fieldwork and collect remote sensing data to characterize the key aspects of the state of each meadow in our comparison set. We will focus on the riparian-zone interface where mass and energy exchanges occur between the river and aquifer as well as between vegetation and the connected vadose-phreatic zone. Our analysis will rely on physically-based simulation models that describe water and energy fluxes. Our intended contribution is to develop and test a set of transferable measures that might be used to 1) assess river-restoration projects, 2) gain an understanding of the key changes in hydrologic processes in restored and degraded meadow environments, and 3) provide at least some of the hydrological-science basis for successful hydroecological restoration. To enhance outreach, we have initiated interaction with the Feather River Coordinated Resource Management Group (FRCRM), a non-profit public interest group consisting of 23 watershed stakeholders that was formed in 1985.

重建被破坏的生态系统的新努力往往涉及河流恢复。这种水生态干预旨在使每个退化的陆地环境恢复到更自然的状态。尽管近年来在各种环境下开始了河流恢复，但很少有工具来跟踪、量化和评估水文在空间和时间上的变化。这项建议涉及对退化草地和那些已进行河流恢复以模拟加利福尼亚州北部羽毛河流域自然环境的草地进行比较分析。羽毛河流域之所以成为目标，是因为它很容易到达，而且只有一条河的草甸，作为恢复工作的一部分，那里的河道已经被重新安置。剩下的退化草甸有深深的河道和干燥的草原植被。我们的目标是开发一种方法来定量评估小草地上的河流恢复。我们计划进行实地调查并收集遥感数据，以确定我们比较组中每一种草地状况的关键方面。我们将重点放在河岸带界面上，在那里河流和含水层之间以及植被和相连的渗流-潜水带之间发生质量和能量交换。我们的分析将依赖于描述水和能量通量的基于物理的模拟模型。我们的目标是开发和测试一套可转让的措施，这些措施可用于1)评估河流恢复项目，2)了解恢复和退化的草甸环境中水文过程的关键变化，以及3)至少为成功的水生态恢复提供一些水文科学基础。为了加强外展，我们已开始与羽毛河协调资源管理小组(FRCRM)互动，FRCRM是一个非营利性公共利益组织，由23个流域利益攸关方组成，成立于1985年。