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

Description Usage Arguments Value Author(s) References See Also Examples

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

1	cooper_jacob_solution_dlogt(ptest, a, t0, t)

`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

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

Oscar Garcia-Cabrejo khaors@gmail.com

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

Other cooper_jacob functions: cooper_jacob_calculate_parameters, cooper_jacob_solution_initial, cooper_jacob_solution, cooper_jacob_well_function

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)