boulton_solution_initial: boulton_solution_initial

In khaors/pumpingtest: R Package for the analysis and evaluation of pumping tests

Description

Function to calculate the initial values of the hydraulic parameters of the Boulton model

Usage

boulton_solution_initial(ptest)

Arguments

ptest

A pumping_test object

Value

A list with:

• a: Slope of the straight line fitted to the drawdown data using the Cooper-Jacob approach

• t0: Intercept of the straight line fitted to the drawdown data using the Cooper-Jacob approach (early time)

• t1: Intercept of the straight line fitted to the drawdown data using the Cooper-Jacob approach (late time)

• phi: Delay parameter. Dimensionless parameter defined as

  φ = \frac{α_{1} r^{2} S}{T}

  where α_{1} is a fitting parameter without a physical estimation, r is the distance between the pumping and observation well, S is the storage coefficient and T is the transmissivity.

Author(s)

Oscar Garcia-Cabrejo [e-mail]

References

Boulton, N. The drawdown of the water-table under non-steady conditions near a pumped well in an unconfined formation. Proceedings of the Institution of Civil Engineers, 1954, 3, 564-579

Examples

data(boulton)
ptest <- pumping_test("Well1", Q = 0.03, r = 20, t = boulton$t, s = boulton$s)
boulton.sol <- boulton_solution_initial(ptest)

khaors/pumpingtest documentation built on Nov. 15, 2019, 8:10 p.m.