jacob_lohman_G_calculate_parameters

Function to calculate the hydraulic parameters for the Jacob-Lohman solution (Discharge)

jacob_lohman_G_calculate_parameters(ptest, par)

Arguments

ptest	A pumping_test object
par	A list with the slope and the intercept (a and t0) of the straight line fitted to the drawdown data using the Cooper-Jacob approach

Value

A list with

• Tr Transmissivity

• Ss Storage coefficient

• radius_influence

References

Jacob, C. E. & Lohman, S. W. Nonsteady Flow to a Well Of Constant Drawdown. American Geophysical Union, 1952, 33, 10.

See also

Other jacob_lohman functions: jacob_lohman_F_calculate_parameters, jacob_lohman_F_solution_initial, jacob_lohman_F_solution, jacob_lohman_F_well_function, jacob_lohman_G_WF_LT, jacob_lohman_G_solution_initial, jacob_lohman_G_solution, jacob_lohman_G_well_function, jacob_lohman_WF_F_LT

Examples

data(jacob_lohman)
s <- vector("numeric", length(jacob_lohman$t))
s[1:length(jacob_lohman$t)] <- 0
ptest <- pumping_test("Well1", Q = jacob_lohman$q, r = 0.0, t = jacob_lohman$t, s = s)
#> Warning: the condition has length > 1 and only the first element will be used
sol0 <- jacob_lohman_G_solution_initial(ptest)
jl.par <- jacob_lohman_G_calculate_parameters(ptest, sol0)
print(jl.par)
#> $Tr
#> [1] 1.899174e-07
#> 
#> $Ss
#> [1] Inf
#> 
#> $radius_influence
#> [1] 0
#>