Equipment: EA: Acquisition of Electrical Resistivity Instrumentation to Elucidate Hydrologic Processes in the Critical Zone

设备： EA：购买电阻率仪器以阐明关键区域的水文过程

• 批准号: 2243545
• 负责人: Pamela Sullivan
• 金额: $ 10.17万
• 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: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2243545&HistoricalAwards=false
• 关键词: Equipment; EA; Acquisition; Electrical; Resistivity; Equipment; EA; Acquisition; Electrical; Resistivity

Water in the ground is an important resource that humans rely on but it is hard to measure. Geophysical measurements, like electrical resistivity tomography (ERT), provides a way to understand differences in things like how much water is in the soil and rock without having to dig or drill holes in the ground which can be destructive and expensive. We propose to obtain a new ERT unit to measure how moisture in the ground is impacted by changes in land cover and geology. We plan to train undergraduate and graduate students in at least two field courses using this new equipment. Our goal is to provide students with skills that prepare them for the workforce.Non-destructive imaging of subsurface properties through ERT provides a means of scaling point measurements of subsurface moisture across larger spatial and temporal domains. Mapping moisture dynamics in 2-3D allows us to address ecohydrologic questions at the heart of the National Academy of Science’s Earth and Time report, such as: What influences the spatial patterns of land cover change such as woody encroachment, species establishment, and ecosystem productivity? How will changing water resources and vegetation dynamics interact in a warming climate? How do vegetation and hydrological interactions impact carbon and nutrient turnover and transport? The acquisition of more ERT equipment will help to expand the number of studies that can integrate larger spatial domains, allowing us to address these questions.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

地面上的水是人类所依赖的重要资源，但很难衡量。地球物理测量（例如电抗性断层扫描（ERT））提供了一种理解诸如土壤和岩石中有多少水的差异的方法，而不必在地面上挖掘或钻孔，这可能具有破坏性和昂贵。我们建议获得一个新的ERT单元，以衡量地面上的水分如何受到土地覆盖和地质变化的影响。我们计划使用此新设备在至少两个实地课程中培训本科和研究生。我们的目标是为学生提供为员工做准备的技能。通过ERT对地下属性的无损成像提供了一种在较大的空间和临时域中地下水分的缩放点测量方法。在2-3D中绘制水分动力学使我们能够在国家科学院地球和时间报告的核心问题上解决生态问题，例如：什么影响着土地覆盖的空间模式，例如木质加密，物种建立和生态系统生产力？在变暖的气候下，改变水资源和蔬菜动态将如何相互作用？蔬菜和氢相互作用如何影响碳和营养转移和运输？获得更多的ERT设备将有助于扩大可以整合较大空间领域的研究数量，从而使我们能够解决这些问题。该奖项反映了NSF的法定任务，并通过使用基金会的智力优点和更广泛的影响来审查标准，通过评估来诚实地支持支持。