RHG: Computes hydraulic geometry dimensions

In mpdougherty/RegionalCurve: A Collection of Hydraulic Regional Curve Relationships

Description

Computes hydraulic geometry dimension (cross sectional area, width, depth, discharge) from a built-in table of regional hydraulic equation coefficients.

Usage

RHG(region, drainageArea, dimensionType = c("area", "depth", "width",
  "discharge"))

Arguments

region	character; The region that a dimension will be calculated for. For a complete list of regions, see levels(regional_curve$region_name)
drainageArea	numeric; The upstream drainage area of the location of the dimension (in square miles).
dimensionType	character; Dimension type: "area", "depth", "width", "discharge"

Details

This function uses values in the regional_curve data frame to calculate hydraulic geometry dimensions. Monomial relationships of the form y=ax^m, known as power functions, appear as straight lines in a log–log graph, with the exponent (m) and constant (a) term corresponding to slope and intercept of the line (y = mx + b).

Value

The numeric value of the requested hydraulic dimension. The units of the dimensions are as follows: area: square feet, depth: feet, width: feet, discharge: cubic feet per second

Examples

# Calculate the discharge for a 200 sq mi watershed in Massachusetts.
RHG(region = "MA", drainageArea = 200, dimensionType = "discharge")

mpdougherty/RegionalCurve documentation built on Nov. 21, 2019, 8:45 p.m.