general_radial_flow_calculate_parameters

Calculates the hydraulic parameters form general_radial_flow model

general_radial_flow_calculate_parameters(ptest, par, hydraulic = TRUE)

Arguments

ptest	A pumping_test object
par	A list with the slope and intercept (a and t0) of the straight line fitted to the drawdown data using the Cooper-Jacob approach
hydraulic	Logical flag to indicate if hydraulic parameters are calculated. If False, the the statistcal parameter (a and t0) are calculated.

Value

A list with

• Tr: Transmissivity

• Ss: Storage coefficient

References

Barker, J. A. A generalized radial flow model for hydraulic tests in fractured rock Water Resources Research, 1988, 24, 1796-1804.

See also

Other general_radial_flow functions: general_radial_flow_WF_LT, general_radial_flow_solution_dlogt, general_radial_flow_solution_initial, general_radial_flow_solution, general_radial_flow_well_function

Examples

data("general_radial_flow1")
ptest.grf1 <- pumping_test("Well1", Q= 0.02322, r = 26.2, t = general_radial_flow1$t,
                           s = general_radial_flow1$s)
par <- list(rw = 0.1, rc = 0.1, rd = 1)
ptest.grf1$additional_parameters <- par
sol0 <-  general_radial_flow_solution_initial(ptest.grf1)
grf1.par <- general_radial_flow_calculate_parameters(ptest.grf1, sol0)
print(grf1.par)
#> $Tr
#> [1] 0.005315041
#> 
#> $Ss
#> [1] 0.0001559432
#> 
#> $n
#> [1] 2
#>