storm water management model, version 4: user's manual

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Figures (continued)II-1. Sinusoidal interpolation of hourly temperatures ............................................................. 353II-2. Typical gage catch deficiency correction ........................................................................ 357II-3. Subcatchment schematization with and without snowmelt simulation........................... 359II-4. Redistribution of snow during continuous simulation .................................................... 361II-5. Seasonal variation of melt coefficients ........................................................................... 367II-6. Typical areal depletion curve for natural area................................................................. 371II-7. Effect on snow cover on areal depletion curves.............................................................. 372II-8. Schematic of liquid water routing through snow pack.................................................... 375IV-1. Flows into, through, and out of a storage/treatment unit................................................. 388IV-2. Time varying inflow and outflow rates for a reservoir.................................................... 389IV-3. Well-mixed, variable-volume reservoir .......................................................................... 393IV-4. Reduction in volatile solids in raw sludge ...................................................................... 398IV-5. Camp’s sediment trap efficiency curves.......................................................................... 403IV-6. Limiting cases in sediment trap efficiency...................................................................... 404V-1. Horton infiltration curve and typical hyetograph ............................................................ 410V-2. Cumulative infiltration, F, is the integral of f, i.e., the area under the curve .................. 410V-3. Regeneration (recovery) of infiltration capacity during dry time steps........................... 413V-4. Subcatchment schematization for overland flow calculations ........................................ 419V-5. Non-linear reservoir model of subcatchment .................................................................. 420V-6. Depth parameters for trapezoidal channel and circular pipe........................................... 423V-7. Richardson extrapolation as used in the runoff block..................................................... 425VI-1. Shield’s diagram for definition of incipient motion ....................................................... 420VI-2. Linear and parabolic approximation of Shield’s diagram ............................................... 431VI-3. Particle size distribution for a pollutant .......................................................................... 434VI-4. Truncation of particle size distribution during scour and deposition.............................. 435VII-1. Flow and quality data for Seattle, Washington, View Ridge I catchment.............................VII-2. Flow and quality data for Seattle, Washington, South Seattle catchment.............................VII-3. Flow and quality data for Seattle, Washington, Southcenter catchment...............................VII-4. BOD load vs. flow.................................................................................................................VII-5. TSS load vs. flow ..................................................................................................................VII-6. NO 2 -N + NO 3 -N load vs. flow ..............................................................................................VII-7. Log 10 BOD load vs. log 10 flow..............................................................................................VII-8. Log 10 TSS load vs. log 10 flow ...............................................................................................VII-9. Log 10 NO 2 -N + NO 3 -N load vs. log 10 flow............................................................................VII-10.Log 10 load vs. log 10 flow for all events..................................................................................VII-11.Log 10 load vs. log 10 runoff for all events BOD, TSS and NO 2 -N + NO 3 -N..........................VII-12.Log 10 load/area vs. log 10 runoff for all events BOD, TSS, and NO 2 -N + NO 3 -N .................VII-13.Flow and quality data for Stevens Avenue catchment ..........................................................xviii
Figures (continued)VII-14.BOD concentration vs. flow, event 1, event 2, event 6.........................................................VII-15.TSS concentration vs. flow, event 1, event 2, event 6 ..........................................................VII-16.NO 3 -N concentration vs. flow, event 1, event 2, event 6......................................................VII-17.BOD load vs. flow, event 1, event 2, event 6........................................................................VII-18.TSS load vs. flow, event 1, event 2, event 6 .........................................................................VII-19.NO 3 -N load vs. flow, event 1, event 2, event 6.....................................................................VII-20.Log 10 concentration vs. log 10 flow for all events, TSS, NO 3 -N ............................................VII-21.Log 10 load vs. log 10 flow for all events, BOD, TSS, NO 3 -N.................................................X-1. GROUND Parameters and conceptualization ................................................................. 473X-2. Tension, PSI, and hydraulic conductivity, K, versus moisture content........................... 479X-3. Tension, PSI, and hydraulic conductivity, K, versus moisture content........................... 479X-4. Tension, PSI, and log 10 of hydraulic conductivity, K, versus moisture content.............. 479X-5. Model representation of and measured hydraulic conductivity curves for three typesof soil............................................................................................................................... 480X-6. Kinds of water in soil ...................................................................................................... 482X-7. Hydrograph of total flow and its two major components................................................ 484X-8. Definition sketch for Dupuit-Forcheimer approximation for drainage to adjacentchannel ............................................................................................................................ 485X-9. Definition sketch for Hooghoudt’s method for flow to circular drains........................... 486X-10. Flowchart of subsurface and directly connected surface calculations............................. 488X-11. Map of Cypress Creek watershed in Pasco County, Florida ........................................... 490X-12. Subsurface input data for Cypress Creek calibration ...................................................... 491X-13. Continuity check for surface and subsurface for Cypress Creek calibration................... 492X-14. Predicted groundwater flow hydrograph and total measured flow hydrograph forCypress Creek calibration ............................................................................................... 494X-15. Total predicted flow hydrograph and total measured flow hydrograph forCypress Creek calibration ............................................................................................... 495X-16. Predicted and measured stages for Cypress Creek calibration........................................ 496X-17. Predicted and measured stages for Cypress Creek verification....................................... 496X-18. Predicted groundwater flow hydrograph and total measured flow hydrograph forCypress Creek verification .............................................................................................. 497X-19. Total predicted flow hydrograph and total measured flow hydrograph forCypress Creek verification .............................................................................................. 498X-20. Hyetograph for hypothetical subcatchment..................................................................... 499X-21. Hydrographs of surface flow and simulated water table stage from hypotheticalsubcatchment................................................................................................................... 499xix
Page 1: EPA/600/3-88/001aNTIS PB88-236641/A
Page 4 and 5: are not severe, the model is very e
Page 7 and 8: ContentsDisclaimer ................
Page 9 and 10: Contents (continued)Discretization
Page 11 and 12: Contents (continued)Pollutant Remov
Page 13 and 14: Contents (continued))Quality.......
Page 15 and 16: Contents (continued)Particle Size D
Page 17: Figures (continued)4-32. Time histo
Page 22 and 23: Tables (continued)VIII-1. Average M
Page 24 and 25: Changes for October 1992 Second Pri
Page 26 and 27: Heaney and Nix, 1977) and others: H
Page 28 and 29: All three original contractors have
Page 30 and 31: 4) The effect (receiving waters):SW
Page 32 and 33: Table 1-1. Summary of EPA Storm Wat
Page 34 and 35: Table 1-1. ContinuedComputational S
Page 36 and 37: Table 1-1. ContinuedCosts(1) Model
Page 38 and 39: sequencing of input data is still p
Page 40 and 41: available, SWMM may also be used as
Page 42 and 43: Figure 2-1. Relationship among SWMM
Page 44 and 45: Table 2-1. Example SWMM Input with
Page 46 and 47: printed either under the graph or a
Page 48 and 49: 6) the number of pollutants found o
Page 50 and 51: Table 2-2. Detailed Organization of
Page 52 and 53: Table 2-3. FORTRAN Statements Requi
Page 54 and 55: Table 2-5. SWMM Parameter Statement
Page 56 and 57: I/O DeviceLogical UnitCard Reader 5
Page 58 and 59: Here, JIN(K+1) = I refers to an inp
Page 60 and 61: Runoff Block, such a run would be m
Page 62 and 63: Table 2-9. Executive and Graph Bloc
Page 64 and 65: Table 2-9. ContinuedVariable Descri
Page 66 and 67: Table 2-9. ContinuedVariable Descri
Page 68 and 69:
Section 3Combine BlockBlock Descrip
Page 70 and 71:
Figure 3-1. Combination of SWMM run
Page 72 and 73:
can be used to combine the two netw
Page 74 and 75:
Table 3-1. Combine Block Input Data
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