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Collaborating Authors
Abomey
The Bénin project is a collaborative effort apart of the Geoscientists Without Borders program. The team conducting the study is comprised of students, scientists, and professors from Boise State University, Gonzaga Univeristy, Université of Nice Sophia Antipolis, and L'Université d'Abomey-Calavi--the principal university in Bénin, West Africa. The coastal city of Cotonou in Bénin, West Africa, with approximately 1.5–2.0 million people, is facing a serious threat to the sustainability of its fresh water supply. Cotonou relies on the Godomey aquifer for domestic water supply. An aquifer is a body of permeable rock that can contain or transmit groundwater.
- North America > United States > Idaho > Ada County > Boise (0.29)
- Africa > Benin > Zou > Abomey (0.29)
- Information Technology > Knowledge Management (0.40)
- Information Technology > Communications > Collaboration (0.40)
The main goals of this project were to develop a pool of low-cost, open-source geophysical instruments; obtain critical hydrogeophysical data for improving understanding of the Godomey Aquifer system; distribute knowledge and instrumentation across a large regional network of hydrogeophysicists; and help launch a newly proposed CSM Humanitarian Engineering and Science: Geophysics Masters degree program. The project team used DC Resistivity – CSM-developed system for Vertical Electrical Soundings (VES) in Wenner array geometries, DC Resistivity – Sting R1 system used in the same way as Seismic reflection – up to 48-channel Geometrics Geode system with 14 Hz geophones and 5 m takeout cables. A sledgehammer striking a seismic plate was used as the seismic source. Teams of Université d'Abomey-Calavi (UAC) and CSM students built instruments and conducted geophysical surveys with both the low-cost and comparable commercial equipment in a field-camp investigation of the Ouédo Pumping Area site, which supplies water to Cotonou and several nearby cities.
- North America > United States > North Dakota > McKenzie County (0.30)
- Africa > Benin > Zou > Abomey (0.30)
Development and validation of a low-cost direct current resistivity meter for humanitarian geophysics applications
Sirota, Dana (Colorado School of Mines, Pacific Northwest National Labs) | Shragge, Jeffrey (Colorado School of Mines) | Krahenbuhl, Richard (Colorado School of Mines) | Swidinsky, Andrei (Colorado School of Mines) | Yalo, Nicaise (Université d’Abomey-Calavi) | Bradford, John (Colorado School of Mines)
ABSTRACT Insufficient access to safe drinking water is one of the most challenging global humanitarian issues. The development of low-cost microcontrollers and the widespread availability of cheap electronic components raise the possibility of developing and using low-cost geophysical instrumentation with open-source designs and software solutions to circumvent geophysical instrumentation capital cost issues. To these ends, we alter an existing low-cost direct current (DC) resistivity meter design and develop an optional modular Raspberry Pi data-logging system to improve the unit’s functionality and usability and to ensure data integrity. Numerical modeling and physical testing demonstrate that the system is more robust than previously published low-cost designs and works in a more diverse range of geologic scenarios — especially conductive environments. Our instrument was tested in a Geoscientists Without Borders project jointly run between researchers from Colorado School of Mines (CSM) and Université d’Abomey-Calavi (UAC), Cotonou, Benin. A key project component involved CSM and UAC students constructing and validating two low-cost DC resistivity meters and then using these instruments for fieldwork aimed at better characterizing and monitoring the health of a local aquifer used as a groundwater source for communities in the Cotonou region. The low-cost instruments were successfully used alongside a commercial resistivity meter to acquire data for 2D inversion of aquifer hydrostratigraphy, indicating the presence of a clay-sand contact. The costs of the redesigned instrument and data logger, respectively, are $177 and $108 (in 2021 USD) with future cost reductions possible, which are fractions of the price of commercial resistivity meters.
- North America > United States > Colorado (0.49)
- Africa > Benin > Zou > Abomey (0.24)
- Geology > Geological Subdiscipline > Environmental Geology (0.46)
- Geology > Rock Type (0.46)
- Water & Waste Management > Water Management > Water Supplies & Services (1.00)
- Energy > Oil & Gas > Upstream (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Exploration, development, structural geology (1.00)
- Health, Safety, Environment & Sustainability > Sustainability/Social Responsibility (1.00)
- Data Science & Engineering Analytics > Information Management and Systems (1.00)
- Information Technology > Software (1.00)
- Information Technology > Hardware (1.00)
- Information Technology > Data Science > Data Quality (0.34)