SWMM 5, Watersheds, Water Quality, Technology, Hydrology, Hydraulics - Watershed

SWMM 5 Link Variables

SWMM 5 View Variables

The SWMM 5 binary graphics file consists of 46 variables for each link/pump/weir/orifice simulated in SWMM 5. The variables are:

Link Variables	Description
LINK_FLOW	flow rate
LINK_DEPTH	flow depth
LINK_VELOCITY	flow velocity
LINK_FROUDE	Froude number
LINK_CAPACITY	ratio of depth to full depth
LINK_XAREA	link x sectional area
LINK_WtdAREA	link x sectional area
LINK_WtdR	link Wtd Hydrualic radius
LINK_A1	upstream conduit area
LINK_A2	downstream conduit area
LINK_R1	upstream hydraulic radius
LINK_R2	downstream hydraulic radius
LINK_WIDTH	link mid section width
LINK_D1	upstream link water surface depth in the link
LINK_D2	downstream link water surface depth in the link
LINK_DQDH	link surcharge dqdh
LINK_ATYPE	link area type
LINK_DQ1	link dq1 term
LINK_DQ2	link dq2 term
LINK_DQ3	link dq3 term
LINK_DQ4	link dq3 term
LINK_DQ5	link dq3 term
LINK_MINOR	link minor loss terms
LINK_DQ6	link dq3 term
LINK_DQ8	link dq3 term
LINK_qNorm1	link dq3 term
LINK_qNorm2	link dq3 term
LINK_DQTOTAL	link dq4 term
LINK_H20SLOPE	water slope difference
LINK_FASNH	link iterations to this time step
LINK_AKON	link dynamic wave denom
LINK_ITERATIONS	link iterations to this time step
LINK_TIMESTEP	link iterations to this time step
LINK_SWMM3	swmm 3 cross sectional area
LINK_SWMM4	swmm 4 cross sectional area
LINK_SWMM5	swmm 5 cross sectional area
LINK_VHUP	velocity head upstream
LINK_VHMID	velocity head mid conduit
LINK_VHDN	velocity head downstream
LINK_VHHF	friction loss
LINK_BE_RHS	Bernoulli equation balance downstream node
LINK_BE_LHS	Bernoulli equation balance upstream node
LINK_CENTER_VEL	Velocity of the main channel in a natural channel section
LINK_LEFT_VEL	Velocity of the left overbank channel in a natural channel section
LINK_RIGHT_VEL	Velocity of the right overbank channel in a natural channel section
LINK_QUAL	concentration of each pollutant