# unitResponse: The water table recharge: the response unit In ecor/soilwater: Implementation of Parametric Formulas for Soil Water Retention or Conductivity Curve

## Description

The water table recharge: the response unit

## Usage

 `1` ```unitResponse(t, d = 1, D = 1, H = d, m = 100) ```

## Arguments

 `t` time coordinate `d` depth of unsaturated zone along the slope-normal direction `D` soil water diffusivity `H` soil depth `m` maximum limit of summary truncation. Default is 100.

## Note

This function calcletes the water-table recharge rate in a hillslope assuming:

1. Richards' Equation is linearized and reduced to the form of heat equation;

2. The diffusion water-table rate is connectedwith soil pressure head according with eq. 13 (Cordano and Rigon, 2008);

## References

Cordano, E., and R. Rigon (2008), A perturbative view on the subsurface water pressure response at hillslope scale, Water Resour. Res., 44, W05407, doi:10.1029/2006WR005740. http://onlinelibrary.wiley.com/doi/10.1029/2006WR005740/pdf

## Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11 12``` ```library(soilwater) t <- seq(0,2,by=0.001) d <- c(1,0.75,0.5,0.25) val1 <- unitResponse(t, d = d, D = 1, H = 1, m = 500) val2 <- unitResponse(t, d = d, D = 1, H = 1, m = 500) val3 <- unitResponse(t, d = d, D = 1, H = 1, m = 500) val4 <- unitResponse(t, d = d, D = 1, H = 1, m = 500) ```

ecor/soilwater documentation built on May 15, 2019, 10:06 p.m.