Makapu’u-Kaiwi Coast SP map


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Resource type: Composite Resource
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Created: Oct 27, 2020 at 9:46 p.m.
Last updated: Oct 27, 2020 at 9:47 p.m.
DOI: 10.4211/hs.bc4300176d58468daa693c2c3cd469af
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Abstract

This self-potential dataset has been acquired at Makapuu/Kaiwi Coast (Oahu, Hawaii, USA)in the frame of a Summer Class entitled "Hydrogeophysics in Volcanic Environments" given at the University of Hawaii at Manoa. The data helps understanding and mapping underground water circulations in this study area.. Self Potential survey for ‘Ike Wai aim at understanding underground water circulations in the coastal area and across the High-Low divide (Big Island) as well as in valley/ridge systems and across the natural hydrogeological “dams” (O’ahu). The objective is to enhance our understanding of ground water flows and aquifer depths in the areas studied. Combined with other datasets (seismic noise and Electric Resistivity Tomography), the Self Potential method gives valuable structural and geological information (faults, lithological transitions/interfaces, etc).the self-potential is a difference of electrical potential naturally occurring in the ground, measured between two electrodes placed at the surface of the Earth or in boreholes. SP can be generated by redox potentials associated with ore bodies or contaminant plumes that are rich in organic matter. A second source of self-potential anomalies is the thermoelectric effect associated directly with a gradient of the temperature affecting the chemical potential gradient of charge carriers. A third source is related to gradients of the chemical potential of the ionic charge carriers at constant temperature. A fourth source of self-potential signals is the streaming potential contribution related to the flow of the pore water relative to the mineral grain framework in saturated and unsaturated conditions.Basic corrections have been applied to all the datasets. Detailed analysis and interpretations are ongoing for Queen Lili`uokalani Trust (Big Island) and Dole (O’ahu) datsets.The data for each study site is stored in one Excel file composed of several datasheets. Each sheet represents one profile or part of a profile or a final table (tab found under the name TOTAL in each Excel file) containing data ready to be plotted or interpolated for maps. The sheets of a file are linked together and at this stage they should not be separated because they are connected together for the processing, and together they are used to create maps- Raw data for each profile within a study site is located in each sheet corresponding to individual profiles or sections of profiles- Names of participants to field surveys are detailed at the top of each excel sheet, in each excel file

Subject Keywords

Resource Level Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal Degrees
Place/Area Name:
Makapu?u-Kaiwi Coast (O?ahu)
Longitude
-157.6565°
Latitude
21.2992°

Temporal

Start Date:
End Date:

Content

readme.md

‘Ike Wai:

In 2016, University of Hawai‘i launched the Hawai‘i EPSCoR ‘Ike Wai project supported by the National Science Foundation (Award # OIA-1557349) The five-year project uses integrated research, education, and community engagement efforts aimed to ensure Hawai‘i’s future water security and promote resource management within the state that is sustainable, responsible, and data-driven.

To save space on Hydroshare, all ‘Ike Wai project files are stored at the University of Hawai‘i and linked here. Please use the following link(s) to see the files for this resource.

Data state:

Processed

Variables

  • Self Potential (SP)

    Self_Potential(SP)

    Geology

    Unknown

    Regular Sampling

    millivolts(mV)

    Field Observation

    the self-potential is a difference of electrical potential naturally occurring in the ground, measured between two electrodes placed at the surface of the Earth or in boreholes. SP can be generated by redox potentials associated with ore bodies or contaminant plumes that are rich in organic matter. A second source of self-potential anomalies is the thermoelectric effect associated directly with a gradient of the temperature affecting the chemical potential gradient of charge carriers. A third source is related to gradients of the chemical potential of the ionic charge carriers at constant temperature. A fourth source of self-potential signals is the streaming potential contribution related to the flow of the pore water relative to the mineral grain framework in saturated and unsaturated conditions.

Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
National Science Foundation ‘Ike Wai: Securing Hawaii’s Water Future Award OIA-1557349

Contributors

People or Organizations that contributed technically, materially, financially, or provided general support for the creation of the resource's content but are not considered authors.

Name Organization Address Phone Author Identifiers
Stéphanie Barde-Cabusson

How to Cite

Barde-Cabusson, S. (2020). Makapu’u-Kaiwi Coast SP map, HydroShare, https://doi.org/10.4211/hs.bc4300176d58468daa693c2c3cd469af

This resource is shared under the Creative Commons Attribution CC BY.

 http://creativecommons.org/licenses/by/4.0/
CC-BY

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