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

Contents (continued)Energy Budget..................................................................................................... 380Short Wave Radiation, H rs .................................................................................. 381Heat Conduction Through Ground, H g ............................................................... 381Net Long Wave Radiation, H rl ............................................................................ 381Convective Heat Transfer, H c .............................................................................. 382Condensation Heat Transfer, H e .......................................................................... 383Heat Advection by Rain, H p ................................................................................ 383Combined Equations ........................................................................................... 384Numerical Example............................................................................................. 384IV Storage/Treatment Simulation................................................................................... 386Objectives............................................................................................................ 386Program Development and Overview ................................................................. 386Development ................................................................................................. 386Overview ....................................................................................................... 387Simulation Techniques........................................................................................ 387Introduction ................................................................................................... 387Flow Routing................................................................................................. 389Pollutant Routing .......................................................................................... 393Pollutant Characterization............................................................................. 396Pollutant Removal......................................................................................... 396Cost Calculations .......................................................................................... 406Summary ............................................................................................................. 407V Runoff Block Evaporation, Infiltration and Routing................................................. 408Evaporation ......................................................................................................... 408Infiltration............................................................................................................ 408Introduction ................................................................................................... 408Integrated Horton’ Equation.......................................................................... 408Green-Ampt Equation ................................................................................... 415Subcatchment Runoff Calculations..................................................................... 418Overland Flow............................................................................................... 418Channels and Pipes ....................................................................................... 422Variable Time Step ....................................................................................... 423Extrapolation Technique ............................................................................... 424VI Transport Block Scour and Deposition ..................................................................... 426Introduction ......................................................................................................... 426Methodology and Assumptions........................................................................... 427Overview ....................................................................................................... 427Assumptions.................................................................................................. 427Shield’s Criterion ................................................................................................ 428xiv