cooper_jacob_solution_dlogt: cooper_jacob_solution_dlogt

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

cooper_jacob_solution_dlogt

Description

Function to calculate the derivative of the drawdown with respect to log of time of the Cooper-Jacob solution

Usage

cooper_jacob_solution_dlogt(ptest, a, t0, t)

Arguments

ptest	A pumping_test object
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
t	Numeric vector with the time at which measurements were taken

Value

A numeric vector with the values of the derivative of drawdown with respect to log of time

Author(s)

Oscar Garcia-Cabrejo [e-mail]

References

Cooper, H. & Jacob, C. A generalized graphical method for evaluating formation constants and summarizing well field history. Transactions of the American Geophysical Union, 1946, 27, 526-534

See Also

Other cooper_jacob functions: cooper_jacob_calculate_parameters, cooper_jacob_solution_initial, cooper_jacob_solution, cooper_jacob_well_function

Examples

data(theis)
ptest <- pumping_test("Well1", Q= 1.3e-3, r = 200, t = theis$t, s = theis$s)
sol0 <- cooper_jacob_solution_initial(ptest)
sol_dlogt <- cooper_jacob_solution_dlogt(ptest, sol0$a, sol0$t0, ptest$t)
print(sol_dlogt)

khaors/pumpingtest documentation built on June 10, 2025, 4:53 a.m.