Equipment: Acquisition of the IRIS instruments FullWaver device for monitoring active landslides in Oklahoma

这笔赠款支持购买最先进的电子地球物理工具，该工具可以在不需要钻探和挖掘的情况下提供地下的3D图像。该设备的性能优于其他可用的电子地球物理工具，因为它不需要布线，并且有许多独立的发射站和接收站，从而能够进行大规模研究。该工具将在俄克拉荷马大学(OU)使用，研究人员和学生以及俄克拉荷马地质调查局(OGS)将使用该工具进行一系列研究。该文书特别重要，因为它将扩大在减轻地质灾害领域的研究。此外，它还将用于其他研究，包括1)描述地下特征以更好地了解地球表面前100米内地震的影响，2)监测山体滑坡并确定其原因和影响，3)发现淡水，4)评估基础设施基础结构的完整性，5)地下污染物迁移监测，6)关键矿物(如锂)勘探。此外，该工具将用于在夏季为期6周的野营培训计划中教育在俄亥俄州立大学攻读学位的本科生和研究生。最后，购买这一工具将有助于研究和开发新的科学方法，以解决俄克拉荷马州部落社区面临的环境和地质灾害问题。该项目将在俄克拉荷马大学地球科学学院采购一台IRIS仪器公司的FullWaver电子地球物理仪器。FullWaver设备包包括(A)多个独立的记录设备(接收器)，能够测量全波形时域激电(TDIP)、直流电阻率(DC-ER)和自然电位(SP)信号；(B)一个与接收器无线同步的电流变送器；以及(C)两个信号处理软件。每个FullWaver接收器都包括内置的GPS，并且与任何其他电阻率设备不同的是，它有自己的电源(即与电流变送器单元分开)，因此完整的测量设置不需要将各个设备(传感器)连接到主设备的任何电缆，从而允许在以下情况下使用FullWaver：(1)在较大的表面上，(2)在恶劣地形中，以及(3)经常需要传感器准确位置的地区(如容易发生地面沉陷的地区)，所有这些使FullWaver成为长期描述滑坡现场特征的完美仪器。该仪器特别重要，因为它将扩大我们在地球科学学院的地质灾害缓解领域的研究，以及其他近地表地球物理研究领域(例如，监测大范围的污染物传输)。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

This grant supports the acquisition of a state-of-the-art electrical geophysical tool that can provide 3D images of the subsurface without the requirement of drilling and excavation. The equipment outperforms other available electrical geophysical tools in that it requires no wiring and has many separate transmitter and receiver stations, enabling large-scale studies. The tool will be used at the University of Oklahoma (OU) and will be used by researchers and students and the Oklahoma Geological Survey (OGS) for a suite of research studies. The instrument is particularly important as it will expand research in the area of geohazard mitigation. Furthermore, it will be used for other research studies including 1) characterizing the subsurface for better understanding the effect of earthquakes within the first 100 m of Earth’s surface, 2) monitoring landslides and identifying their causes and effects, 3) finding fresh groundwater, 4) assessing infrastructure foundation structural integrity, 5) contaminant transport monitoring in the subsurface, and 6) critical mineral (such as lithium) exploration. Additionally, the tool will be used for educating undergraduate and graduate students who are pursuing degrees at OU during a 6-week field camp training program in the summers. Finally, the acquisition of this tool will allow for the research and development of new scientific approaches to tackle the environmental and geohazard issues facing tribal communities across the state of Oklahoma.This project will procure an IRIS Instruments FullWaver electrical geophysical instrument at the School of Geosciences at the University of Oklahoma (OU). The FullWaver device package consists of (a) multiple separate recording devices (receivers) capable of measuring full waveform time domain induced polarization (TDIP), direct current electrical resistivity (DC-ER) and self-potential (SP) signals; (b) one electrical current transmitter, which is wirelessly synchronized with the receivers and (c) two signal processing software. Each FullWaver receiver includes a built-in GPS and unlike any other resistivity devices include its own power source (i.e., separated from electrical current transmitter unit), thus a full survey setup does not require any cables connecting the individual devices (sensors) to a main device, allowing use of the FullWaver (1) on large surfaces, (2) in harsh terrains, and (3) areas that constantly require an accurate position of the sensors (e.g., areas prone to land subsidence), all of which making the FullWaver the perfect instrument for long-term landslide site characterization. The instrument is particularly important as it will expand our research in the area of geohazard mitigation at the School of Geosciences among other near-surface geophysical research areas (e.g., monitoring contaminant transport at large scales).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.