n_direct: Compute total channel roughness via direct field measurement

In HYDROCAL: Hydraulic Roughness Calculator

Compute total channel roughness via direct field measurement

Description

n_direct calculate Manning's n using direct measurements

Usage

n_direct(radius, slope, velocity, restrict = TRUE)

Arguments

radius	hydraulic radius (R) in meters
slope	channel slope (S) in m/m
velocity	average velocity (U) in meters per second
restrict	allows for function parameters to restrict certain values. Type bool. Default TRUE.

Value

Manning's n

Examples

# Result: Manning's n of 0.710 
n_direct(2,0.05,0.5)

# Result: Manning's n of 3.216
n_direct(10,0.03,0.25)

# Result: Manning's n of 5.440
n_direct(22,0.12,0.5)

# Result: Hydraulic radius cannot be negative.
n_direct(-2,0.12,0.5)

HYDROCAL documentation built on Feb. 16, 2023, 10:11 p.m.