hydReng (version 0.1.0)

flow_max: Maximum Flow

Description

Calculates the maximum discharge of a CSarbitrary or CScircle object for a given bottom slope under uniform flow conditions.

Usage

flow_max(object, J, method = "Strickler", ret = "all", plot = FALSE)

Value

A list containing the following hydraulic variables:

Qmax

Maximum discharge [m3/s].

hmax

Maximum flow depth [m].

v

Flow velocity [m/s].

kSt_m

Mean roughness [m^(1/3)/s] (if method = "Einstein").

A

Wetted area [m2].

Arguments

object

A CSarbitrary or CScircle object.

J

Bottom slope [-].

method

Method to calculate the roughness. Allowed are "Strickler" (equal roughness) "Einstein" (mean roughness) and "Prandtl-Coolebrook-White".

ret

Defines the result returned by the function.

plot

Logical; if TRUE, plots the results.

Examples

# Example for CSarbitrary object
x <- c(0, 4, 9, 13)
z <- c(2, 0, 0, 2)
cs <- CSarbitrary(
  x = x, z = z, xb_l = 4, xb_r = 9,
  kSt_B = 35, kSt_l = 45, kSt_r = 45
)
flow_max(cs, J=0.0001, method="Einstein",ret="Qmax")
flow_max(cs, J=0.0001, method="Einstein",plot=TRUE)

# Example for CScircle object
csC <- CScircle(Di = 0.7, ks = 1.5, kSt = 75)
flow_max(csC, J=0.004)
flow_max(csC, J = 0.004, method = "Prandtl-Coolebrook-White", plot = TRUE)