subunit_head_diameter: Pressure and diameter on the manifold line

In joaobtj/hydirrig: Hydraulic design of irrigation systems

Pressure and diameter on the manifold line

Description

subunit_head_diameter calculates manifold line diameter and pressure for a given average flow rate and a given flow rate variation

Usage

subunit_head_diameter(
  q_req_subunit,
  q_var_subunit = 10,
  s_manifold,
  s_ini_manifold = s_manifold,
  n_manifold,
  dec_manifold,
  d_lateral,
  s_lateral,
  s_ini_lateral = s_lateral,
  n_lateral,
  dec_lateral,
  coef_em,
  exp_em,
  q_unit = q_unit
)

Arguments

q_req_subunit	Average flow required on the subunit, m3/s
q_var_subunit	Subunit maximum variation in flow rate, peq_unit=q_unitentage
s_manifold	Spacing between lateral lines in the manifold line, meter
s_ini_manifold	Spacing of the initial section of the manifold line, meter
n_manifold	Number of lateral lines in the manifold line
dec_manifold	Slope of the manifold line, decimal
d_lateral	Diameter of the lateral line, milimeter
s_lateral	Spacing between emitters on the lateral line, meter
s_ini_lateral	Spacing of the initial stretch of the lateral line, meter
n_lateral	Number of issuers on the lateral line
dec_lateral	Lateral line slope, decimal
coef_em	Coefficient of the flow-pressure equation of the emitter
exp_em	Exponent of the flow-pressure equation of the emitter

Examples

args_subunit_head_diameter <- list(
  q_req_subunit = 2.2222e-6*3600000, q_var_subunit = 10,
  s_manifold = c(0.3, 0.3, 2), s_ini_manifold = 10, n_manifold = 12, dec_manifold = 0.02,
  d_lateral = 16, s_lateral = 1, s_ini_lateral = 4, n_lateral = 40, dec_lateral = -0.01,
  coef_em = 6.41e-7*3600000, exp_em = 0.54, q_unit="l/h"
)
do.call(subunit_head_diameter, args_subunit_head_diameter)

joaobtj/hydirrig documentation built on Oct. 2, 2023, 2:08 p.m.