cooper_solution_dlogt: cooper_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 the log of time for the Cooper solution for slug tests

1	cooper_solution_dlogt(ptest, cd, t0, t)

`ptest`	A pumping_test object
`cd`	Value of the dimensionless storage coefficient (cd)
`t0`	Intercept of the straight line fitted to the drawdown data using the Cooper-Jacob approach
`t`	A numeric vector with the time values

A numeric vector with the values of the drawdown

Oscar Garcia-Cabrejo khaors@gmail.com

Cooper, H. H.; Bredehoeft, J. D. & Papadopulos, I. S. Response of a finite-diameter well to an instantaneous charge of water Water Resources Research, 1967, 3, 263-269

Other cooper functions: cooper_WF_LT, cooper_calculate_parameters, cooper_solution_initial, cooper_solution, cooper_well_function

data(cooper_slug)
ptest <- pumping_test("Well1", Q = 0, r = 0, t = cooper_slug$t, s = cooper_slug$s)
sol0 <- cooper_solution_initial(ptest)
sol_dlogt <- cooper_solution_dlogt(ptest, sol0$cd, sol0$t0, ptest$t)
print(sol_dlogt)