SWMM5 - Stormwater Management Model
SWMM 5, Watersheds, Water Quality,Hydrology, Hydraulics - Watersheds
Expanded View Variables
SWMM 5 View Variables
There are four types of graphical variables in SWMM 5: (1) Subcatchements, (2) System, (3) Nodes and (4) Links. The SWMM 5 Hydrology binary graphics file consists of 21 view variables for each subcatcment simulation in SWMM 5. The variables are:
| Subcatchment Variables | Description |
| SUBCATCH_RAINFALL | rainfall intensity |
| SUBCATCH_SNOWFALL | snowfall intensity |
| SUBCATCH_RUNOFF | total runoff flow rate |
| SUBCATCH_RUNOFF_IMPZero | runoff flow rate from zero imp area feb 2007 |
| SUBCATCH_RUNOFF_IMP | runoff flow rate from imp area feb 2007 |
| SUBCATCH_RUNOFF_Pervious | runoff flow rate from pervious area feb 2007 |
| SUBCATCH_LOSSES | total losses (infil) |
| SUBCATCH_EVAP | watershed evaporation loss |
| SUBCATCH_DEPTH | watershed depth |
| SUBCATCH_GW_FLOW | groundwater flow rate to node |
| SUBCATCH_GW_FLOW_A1 | groundwater flow rate to node |
| SUBCATCH_GW_FLOW_A2 | groundwater flow rate to node |
| SUBCATCH_GW_FLOW_A3 | groundwater flow rate to node |
| SUBCATCH_GW_ELEV | elevation of saturated gw table |
| SUBCATCH_GW_THETA | soil moisture |
| SUBCATCH_GW_PERCOLATION | aquifer deep percolation |
| SUBCATCH_SNOWMELT | watershed snow melt |
| SUBCATCH_SNOWDEPTH | watershed snow depth |
| SUBCATCH_FREEWATER | watershed snow depth |
| SUBCATCH_COLD | watershed cold content |
| SUBCATCH_SNOWAREA | watershed snow coverage |
| SUBCATCH_UL | soil thickness |
| SUBCATCH_FTOT | infiltration during an event |
| SUBCATCH_FU | current value of F |
| SUBCATCH_FUMAX | maximum value of F |
| SUBCATCH_MOISTURE | current soil mositure (less than porosity) |
| SUBCATCH_IMD | current IMD (Porisity - Moisture) |
| SUBCATCH_IMDbyEvent | IMD at the beginning of an event |
| SUBCATCH_SAT | Flag for saturation (1 is saturated) |
| SUBCATCH_INFIL_TIME | GA infiltration time |
| SUBCATCH_WLMAX | current infiltration RATE |
| SUBCATCH_NETPRECIP | rainfall intensity |
| SUBCATCH_BUILDUP | pollutant buildup concentration |
| SUBCATCH_WASHOFF | pollutant washoff concentration |
The SWMM 5 system binary graphics file consists of 25 variables on one line for each system variable simulated in SWMM 5. The variables are:
| System Variables | Description |
| SYS_TEMPERATURE | air temperature |
| SYS_WINDSPEED | wind speed |
| SYS_RAINFALL | rainfall intensity |
| SYS_SNOWFALL | snow depth |
| SYS_RUNOFF | runoff flow |
| SYS_LOSSES | evap + infil |
| SYS_EVAP | evap |
| SYS_DWFLOW | dry weather inflow |
| SYS_GWFLOW | ground water inflow |
| SYS_IIFLOW | RDII inflow |
| SYS_EXFLOW | external inflow |
| SYS_INFLOW | total lateral inflow |
| SYS_FLOODING | flooding outflow |
| SYS_OUTFLOW | outfall outflow |
| SYS_STORAGE | storage volume |
| SYS_CE | continuity error for the basin |
| SYS_ITERATIONS | average iterations over the basin |
| SYS_SNOWDEPTH | snow depth |
| SYS_COLD | cold storage for the basin |
| SYS_SNOWMELT | snowmelt for the basin |
| SYS_RAINMELT | rainmelt for the basin |
| SYS_TS | time steps during the simulation |
| SYS_DWFLoad | total K3 line DWF load |
| SYS_WWFLoad | total K3 line WWF load |
| SYS_WWFLoadExtra | agency extra WWF Load |
The SWMM 5 Node graphics binary file consists of 20 variables on one line for each junction/storage/outfall/divider simulated in SWMM 5. The variables are:
| Node Variables | Description |
| NODE_DEPTH | water depth above invert |
| NODE_HEAD | hydraulic head |
| NODE_VOLUME | volume stored & ponded |
| NODE_LATFLOW | lateral inflow rate |
| NODE_IIFLOW | total rdii inflow rate |
| NODE_UH1 | total rdii inflow rate from UH 1 |
| NODE_UH2 | total rdii inflow rate from UH 2 |
| NODE_UH3 | total rdii inflow rate from UH 3 |
| NODE_DWFFLOW | total DWF inflow rate |
| NODE_INFLOW | total inflow rate |
| NODE_OUTFLOW | total outflow rate |
| NODE_OVERFLOW | overflow rate |
| NODE_CE | node ce |
| NODE_AREA | node surface area |
| NODE_DQDH | node surcharge dqdh |
| NODE_DENOM | node surcharge dqdh |
| NODE_ITERATIONS | node iterations to this time step |
| NODE_TIMESTEP | node iterations to this time step |
| NODE_CONVERGENCE | node iterations to this time step |
| NODE_QUAL | concentration of each pollutant |
Link Variables
Last updated by Robert E Dickinson Apr. 21, 2008.
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