U_parm: U_parm Function to calculate groundwater velocity This...

In dpphat/partFilt: Particle Filtration

Description

U_parm Function to calculate groundwater velocity This function calculates the U-parameter grounwdater velocity from Table 1 of Tobiason and O'Melia (1988). The U-parameter is based on the Kx (hydraulic conductivity), GRAD (hydraulic gradient), and POR (porosity). The default units are cm/s but can be changed with K_units. Only ft/day are accepted as alternative units. The units of the output are cm/s.

Usage

U_parm(Kx = 0.02, GRAD = 7e-04, POR = 0.21, K_units = "cm/s")

Arguments

Kx	Hydraulic conductivity. Defaults to a value of 0.02 cm/s
GRAD	Hydraulic gradient. Defaults to a value of 0.0007
POR	porosity. Defaults to a value of 0.21. The value of 0.21 is the average for medium sand as reported by Johnson (1967)
K_units	Units of hydraulic conductivity. Defaults to cm/s but also accepts ft/day. Units should be surrounded by quotation marks to ensure it is treated as a string of text.

Examples

U <- U_parm(Kx = 0.02, GRAD = 0.0007, POR = 0.21, K_units = "cm/s")
U
[1] 6.666667e-05

dpphat/partFilt documentation built on May 15, 2019, 1:47 p.m.