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step_aquifer_constant_drawdown

step_aquifer_constant_drawdown.Rd

Estimates the flows of a constant drawdown test using Jacob-Lohman 1952.

Usage

step_aquifer_constant_drawdown(
  .rec,
  time,
  drawdown = 1,
  thickness = 1,
  radius_well = 0.15,
  specific_storage = 1e-06,
  hydraulic_conductivity = 1e-04,
  n_terms = 16L,
  role = "predictor",
  ...
)

Arguments

.rec

the R6 recipe object.

time

the time for evaluation (t)

drawdown

drawdown at the well (L)

thickness

the aquifer thickness (L)

radius_well

the radius of the well (L)

specific_storage

specific storage of aquifer (L/L)

hydraulic_conductivity

the hydraulic conductivity (L/t)

n_terms

number of terms for laplace solution inversion

role

character - the name of the role

...

additional arguments

Value

an updated recipe

References

Jacob, C.E. and S.W. Lohman, 1952. Nonsteady flow to a well of constant drawdown in an extensive aquifer, Trans. Am. Geophys. Union, vol. 33, pp. 559-569.

See also

Other aquifer: step_aquifer_grf(), step_aquifer_leaky(), step_aquifer_patch(), step_aquifer_theis(), step_aquifer_theis_aniso(), step_aquifer_wellbore_storage()

Examples

time <- 10^seq(-5, 2, 0.1)
form <- formula(time~.)
dat <- data.frame(time = time)

jl = recipe(formula = form, data = dat) |>
  step_aquifer_constant_drawdown(time = time,
                                 drawdown = 10,
                                 thickness = 10,
                                 radius_well = 0.15,
                                 specific_storage = 1e-6,
                                 hydraulic_conductivity = 1,
                                 n_terms = 12L) |>
  plate()