A new version of the computer program FLASH (Flow-Log Analysis of Single Holes) is presented for the analysis of borehole vertical flow logs to estimate fracture (or layer) transmissivities and far-field hydraulic heads. The program is written in R, an open-source environment. All previous features have been retained and new features incorporated including more rigorous parameter estimation, uncertainty analysis, and improved data import. The program has a dynamic user interface compatible with most operating systems.
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A New R Program for Flow-Log Analysis of Single Holes (FLASH-R).
Ground Water
November 2020
Office of Groundwater, Branch of Geophysics, U.S. Geological Survey, 11 Sherman Place, Unit 5015, Storrs, CT, 06269., USA.
A new version of the computer program FLASH (Flow-Log Analysis of Single Holes) is presented for the analysis of borehole vertical flow logs to estimate fracture (or layer) transmissivities and far-field hydraulic heads. The program is written in R, an open-source environment. All previous features have been retained and new features incorporated including more rigorous parameter estimation, uncertainty analysis, and improved data import.
View Article and Find Full Text PDFA computer program for flow-log analysis of single holes (FLASH).
Ground Water
March 2012
US Geological Survey, Office of Groundwater, Branch of Geophysics, 11 Sherman Place, Unit 5015, Storrs, CT 06269, USA.
A new computer program, FLASH (Flow-Log Analysis of Single Holes), is presented for the analysis of borehole vertical flow logs. The code is based on an analytical solution for steady-state multilayer radial flow to a borehole. The code includes options for (1) discrete fractures and (2) multilayer aquifers.
View Article and Find Full Text PDFNew evidence on the impact of China's New Rural Cooperative Medical Scheme and its implications for rural primary healthcare: multivariate difference-in-difference analysis.
BMJ
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Department of Agricultural and Resource Economics, University of California, Davis, USA.
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View Article and Find Full Text PDFHydraulic head applications of flow logs in the study of heterogeneous aquifers.
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January 2002
U.S. Geological Survey, P.O. Box 25046, MS 403, Denver, CO 80225, USA.
Permeability profiles derived from high-resolution flow logs in heterogeneous aquifers provide a limited sample of the most permeable beds or fractures determining the hydraulic properties of those aquifers. This paper demonstrates that flow logs can also be used to infer the large-scale properties of aquifers surrounding boreholes. The analysis is based on the interpretation of the hydraulic head values estimated from the flow log analysis.
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