Repeat microgravity data from the Hualapai Valley, Mohave County, Arizona, 2008-2019
Dates
Publication Date
2021-09-17
Time Period
2008-04
Time Period
2009-06
Time Period
2017-08
Time Period
2018-09
Time Period
2019-09
Citation
Kennedy, J.R., and Bucci, L.B., 2021, Repeat microgravity data from the Hualapai Valley, Mohave County, Arizona, 2008-2019: U.S. Geological Survey data release, https://doi.org/10.5066/P9MJRMSQ.
Summary
This dataset contains absolute-gravity measurements made using an A-10 absolute gravity meter (Micro-g Lacoste, Inc.) in 2008, 2009, 2017, 2018, and 2019 in the Hualapai Valley, Mohave County, Arizona. Measurements were made at 9 different stations. Data are presented in tabular form, including relevant parameters used for processing. Data were output by g software (Micro-g Lacoste, Inc.) version 9.12.04.23. A correction for laser-frequency drift was applied to data collected in 2009 and 2017 to account for changes in laser wavelength during these periods. The correction is based on linear interpolation in time between regular calibrations of the HeNe laser used in the A-10 against an iodine-stabilized laser. Any use of trade, firm, [...]
Summary
This dataset contains absolute-gravity measurements made using an A-10 absolute gravity meter (Micro-g Lacoste, Inc.) in 2008, 2009, 2017, 2018, and 2019 in the Hualapai Valley, Mohave County, Arizona. Measurements were made at 9 different stations. Data are presented in tabular form, including relevant parameters used for processing. Data were output by g software (Micro-g Lacoste, Inc.) version 9.12.04.23. A correction for laser-frequency drift was applied to data collected in 2009 and 2017 to account for changes in laser wavelength during these periods. The correction is based on linear interpolation in time between regular calibrations of the HeNe laser used in the A-10 against an iodine-stabilized laser.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Knight, J.E., Gungle, B., and Kennedy, J.R., 2021, Assessing potential groundwater-level declines from future withdrawals in the Hualapai Valley, northwestern Arizona: U.S. Geological Survey Scientific Investigations Report, https://doi.org/10.3133/sir20215077.
Data were collected to evaluate aquifer-storage change. Using the horizontal infinite-slab approximation, gravity data (in units of acceleration, for example, m/s^2) can be converted to a thickness of free-standing water, regardless of the depth to or porosity of the interval at which storage-change occurs. Data are not corrected for soil-moisture variation (that is, estimated storage changes include all storage change between the land surface and the aquifer).
