Module 5: WinSLAMM v 9.1 Model Features Robert Pitt, P.E., Ph.D. Dept. of Civil, Construction and Environmental Engineering University of Alabama John Voorhees, PE, PH Earth Tech, Inc.

To Enter the Program or

To Review Current File Data

Select the Edit Buttons to Enter or Change values

Parameter Files and Drainage System Data

To Review Current File Data Status

Output Options Input Data Printout

Combine.dat Files or Access Cost Data

Parameter File Editors

Only Enter Data Here

To convert hourly rainfall data to.ran data:

Main Menu Total acreage in each Land Use Current Land Use and Source Area that User is working on Control Practices I – Infiltration Device W – Wet Detention P – Porous Pavement O – Other Device S – Street Sweeping B – Biofiltration

Name of current.dat file name loaded in model Source Area Parameters. Double-click to change or review Source Area Number – increments by 30 for each Land Use Source Area Acreage. Double-click to enter or change

Defining the Drainage System

Pre-Development Areas and Curve Numbers (CN)

Source Area Parameters

Street Dirt Accumulation Plots

Control Devices

To Execute the Program

Go to: Run/Calculation Module

Output Summary

Runoff Volume Tab Source Areas The runoff volume is listed for each event, for each source area. The model also calculates the land use runoff coefficient (Rv), the total losses, and the SCS Curve Number for each event.

The runoff statistics are summarized for each source area below the event- by-event list.

The model also summarizes the output for the total area, before and after the drainage system, and at the outfall.

Runoff Volume Tab Outfall Additional Output – Runoff coefficient (Rv) Total losses SCS Curve Number With an Outfall Detention Pond - Peak Reduction Factor Pond Flushing Ratio Outlet structure failure

Runoff Volume Source Area Percent Contribution Summary Percentage contribution of runoff volume from each source area, for each land use.

Particulate Solids Concentration Tab Source Areas Particulate solids concentration of each source area, by rainfall event

Particulate Solids Concentration Tab Outfall Concentration Particulate Solids in the drainage system and at the outfall, by rainfall event.

Particulate Solids Yield Tab Source Areas Particulate solids yield has the same output format

Particulate Solids Yield Tab Outfall Particulate Solids yield summary at the outfall also includes the Flow- weighted Minimum Particle Size (microns) controlled by the outfall pond, if there was one.

Particulate Solids Yield Source Area Percent Contribution Summary The model also calculates the percentage contribution of particulate solids from each source area, for each land use.

Output Option 5 One Line per Event Summary Output option 5 is a summary of the outfall results, by event, along with a number of statistics for each parameter. One Line per Event Summary Includes

Number of Events Total Equivalent Annual Total Minimum Maximum Average of All Events Median Standard Deviation Coefficient of Variation Summary Statistics

Batch Processor Options: 1) Create a land-use specific WinSLAMM.DAT format files based upon Standard Land Use files 2) Select and run a set of.dat files to compare outputs and analyze costs 3) Divide a large drainage basin into standard land use areas and then calculate the runoff volume, sediment load, and pollutant loads for each of the areas

To Access the Batch Processor

Questions?