wetland_h_s: Calculates Hayashi-van der Kamp parameters for a Prairie...

In CentreForHydrology/CRHMr: Pre- and post- processing for CRHM

Calculates Hayashi-van der Kamp parameters for a Prairie depressions

Description

Computing pond area and depth for Prairie depressions from the Hayashi-van der Kamp method requires values of the parameters h and s. Unfortunately, these values can't be solved explicitly from the pond max area and volume. This function finds the values of the parameters by iterative solution.

Usage

wetland_h_s(
  max_volume,
  max_area,
  p,
  max_iterations = 100,
  max_error = 1e-04,
  return_stats = FALSE
)

Arguments

max_volume	Required. Maximum volume of a pond in m^3.
max_area	Required. Maximum area of a pond in m^2.
p	Required. Scaling exponent for pond depth-area relationshp. See reference.
max_iterations	Optional. Maximum number of iterations for solution. Default is 100.
max_error	Optional. Maximum error for estimation of parameters, as a fraction of max_area.
return_stats	If TRUE, then the error of solution and the number of iterations will also be returned. Default is FALSE Default is 0.001.

Value

If successful, returns a vector of the parameters h (the maximum pond depth) in m and s (the pond area for a depth of 1 m) in m^2). Optionally returns the error and number of iterations required for solution. If unsuccessful, returns FALSE.

Author(s)

Kevin Shook

References

Hayashi, M., and G. van der Kamp (2000), Simple equations to represent the volume–area–depth relations of shallow wetlands in small topographic depressions, J. Hydrol., 237(1–2), 74–85, doi:10.1016/S0022-1694(00)00300-0.

See Also

Other wetland_functions: wetland_pond_area(), wetland_pond_depth(), wetland_pond_size()

Examples

wetland_h_s(5000, 500, 1.72)

CentreForHydrology/CRHMr documentation built on April 6, 2024, 5:27 p.m.