Description Usage Arguments Note References Examples

The water table recharge: the response unit

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

`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. |

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);

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

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[1], D = 1, H = 1, m = 500)
val2 <- unitResponse(t, d = d[2], D = 1, H = 1, m = 500)
val3 <- unitResponse(t, d = d[3], D = 1, H = 1, m = 500)
val4 <- unitResponse(t, d = d[4], D = 1, H = 1, m = 500)
``` |

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