USGS Groundwater Information: Hydrogeophysics Branch
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Water Software > Groundwater Software > FLASH
FLASH (Flow-Log Analysis of Single Holes) is a computer program for the analysis of borehole vertical flow logs. The code is based on an analytical solution for steady-state multi-layer radial flow to a borehole. The code includes options for (1) discrete fractures and (2) multi-layer aquifers. Given vertical flow profiles collected under both ambient and stressed (pumping or injection) conditions, the user can estimate fracture (or layer) transmissivities and far-field hydraulic heads. FLASH is coded in Microsoft Excel with Visual Basic for Applications routines. The code supports manual and automated model calibration.
First official release is version 1.0, released March 7, 2011. FLASH v1.0 has been tested for use with Microsoft Excel 2007 with Visual Basic for Applications routines.
This USGS software has two citations associated with it.
In instances where an author is citing use of this software, it would be appropriate to cite both the report documenting the code and the specific software release version that was used.
Day-Lewis, F.D., Johnson, C. D., Paillet, F.L., and Halford, K.J., 2011, A computer program for flow-log analysis of single holes (FLASH): Ground Water, https://dx.doi.org/10.1111/j.1745-6584.2011.00798.x
Day-Lewis, F.D., Johnson, C. D., Paillet, F.L., and Halford, K.J, 2011, FLASH: A Computer Program for Flow-Log Analysis of Single Holes v1.0: U.S. Geological Survey Software Release, 07 March 2011, https://dx.doi.org/10.5066/F7319SZC.
Support is provided for correcting bugs and clarification of how FLASH is intended to work. Only limited assistance can be provided for applying FLASH to specific problems by contacting the point of contact listed below:
Earth System Processes Division
Water Mission Area, U.S. Geological Survey
11 Sherman Place, Unit 5015
University of Connecticut
Storrs Mansfield, CT 06269
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