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.

Gorelick0337393重建被破坏的生态系统的新兴努力通常涉及河流恢复。 这种水文生态干预旨在使每一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中开始了河流恢复，但很少有工具可以跟踪、量化和评估水文随时间和空间的变化。 该提案涉及对退化草地和为模拟北加州羽毛河流域自然环境而进行河流修复的草地进行比较分析。 羽毛河流域之所以成为目标，是因为它交通便利，并且包含单河草甸，作为恢复工作的一部分，这些河道已被重新安置。 剩下的退化草甸有深深切割的河道和干燥的草原植被。 我们的目标是开发一种定量评估小草甸河流恢复的方法。 我们计划进行实地考察并收集遥感数据，以表征我们的比较集中每个草地状态的关键方面。 我们将重点关注河岸带界面，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。 我们的预期贡献是开发和测试一套可转移的措施，可用于 1）评估河流恢复项目，2）了解恢复和退化草甸环境中水文过程的关键变化，以及 3）提供至少为成功的水文生态恢复提供了一些水文科学基础。 为了加强推广，我们启动了与 Feather River 协调资源管理小组 (FRCRM) 的互动，该小组是一个由 23 个流域利益相关者组成的非营利公共利益团体，成立于 1985 年。