ENgetlinkvalue {epanet2toolkit}

Retrieve parameter value for a link

Description

ENgetlinkvalue retrieves the value of a specific link parameter for a link.

Usage

ENgetlinkvalue(linkindex, paramcode)

Arguments

linkindex

index of the link

paramcode

requested parameter type either as name or number

Value

The parameter value of a specified link.

Note

Link indexes are consecutive integers starting from 1. Link parameter codes consist of the following constants:

EN_DIAMETER	0	Diameter
EN_LENGTH	1	Length
EN_ROUGHNESS	2	Roughness coeff.
EN_MINORLOSS	3	Minor loss coeff.
EN_INITSTATUS	4	Initial link status (0 = closed, 1 = open)
EN_INITSETTING	5	Initial pipe roughness
		Initial pump speed
		Initial valve setting
EN_KBULK	6	Bulk reaction coeff.
EN_KWALL	7	Wall reaction coeff.
EN_FLOW	8	Flow rate
EN_VELOCITY	9	Flow velocity
EN_HEADLOSS	10	Head loss
EN_STATUS	11	Actual link status (0 = closed, 1 = open)
EN_SETTING	12	Pipe roughness
		Actual pump speed
		Actal valve setting
EN_ENERGY	13	Energy expended in kwatts

Parameters 8 - 13 (EN_FLOW through EN_ENERGY) are computed values. The others are design parameters.

Flow rate is positive if the direction of flow is from the designated start node of the link to its designated end node, and negative otherwise.

Values are returned in units which depend on the units used for flow rate in the EPANET input file.

See Also

ENgetlinkindex ENgetflowunits

Examples

# path to Net1.inp example file included with this package
inp <- file.path( find.package("epanet2toolkit"), "extdata","Net1.inp")  
ENopen(inp, "Net1.rpt")
ENgetlinkvalue(1, "EN_DIAMETER")
ENgetlinkvalue(1, "EN_LENGTH")
ENgetlinkvalue(8, "EN_DIAMETER")
ENgetlinkvalue(8, "EN_LENGTH")
ENclose()