2002_05_10_BASINS_b3docs_PLOAD_v3

2002_05_10_BASINS_b3docs_PLOAD_v3 - PLOAD version 3.0 An...

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PLOAD version 3.0 An ArcView GIS Tool to Calculate Nonpoint Sources of Pollution in Watershed and Stormwater Projects User’s Manual JANUARY 2001
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WDC010120001.ZIP/1/HSQ
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WDC010120001.ZIP/1/HSQ Acknowledgements The PLOAD application was developed by a team of CH2M HILL water resource engineers and GIS analysts. The conceptual design of the application was prepared by Laurens van der Tak and Cheri Edwards. The detailed design and programming was completed by Cody Zook and Mike Miller. Andrea Ryon and Fernando Pasquel tested and reviewed the application. Recent revisions and enhancements were done by Sayedul Choudhury, John Tully, and Tim Hare.
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WDC010120001.ZIP/1/HSQ iii Table of Contents Topic Page GIS Pollutant Loading Application— Users Manual. ................................................................. 1 1. Pollutant Loading Application Overview . ................................................................... 1 2. Input Data. ......................................................................................................................... 2 2.1 GIS Data. ............................................................................................................ 2 2.2 Tabular Data . .................................................................................................... 2 3. Pollutant Loading Calculation Equations. .................................................................... 4 3.1 Export Coefficient Method . ............................................................................ 4 3.2 Simple Method . ................................................................................................ 4 3.3 BMP Computations . ........................................................................................ 5 4. User Input Parameters. .................................................................................................... 6 5. Output Product Options . ................................................................................................ 6 6. PLOAD Input Data . ......................................................................................................... 6 7. Setup and Executing PLOAD. ........................................................................................ 9 7.1 Starting PLOAD . .............................................................................................. 9 7.2 Running PLOAD via New Session. ............................................................. 10 7.3 Running PLOAD via Open Session. ............................................................ 19 7.4 Viewing Output . ............................................................................................ 20 7.5 Creating Layouts and Data Post Processing . ............................................. 20 Appendices Glossary of Terms. ............................................................................................................................. 24 Graphic and Tabular Product Examples . ....................................................................................... 25 Description of PLOAD Scripts. ........................................................................................................ 32 Event Mean Concentrations (EMCs) and Export Coefficients . ................................................... 37
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WDC010120001.ZIP/1/HSQ 1 GIS Pollutant Loading Application— Users Manual 1. Pollutant Loading Application Overview PLOAD is a simplified, GIS-based model to calculate pollutant loads for watersheds 1 . PLOAD estimates nonpoint sources (NPS) of pollution on an annual average basis, for any user-specified pollutant. The user may calculate the NPS loads using either the export coefficient or the EPA’s Simple Method approach 2 . Optionally, best management practices (BMPs), which serve to reduce NPS loads, and point source loads, may also be included in computing total watershed loads. Finally, there are several product alternatives that may be specified to show the NPS pollution results as maps and tabular lists, and to compare multiple sessions. The PLOAD application requires pre-processed GIS and tabular input data as listed below: GIS land use data GIS watershed data GIS BMP site and area data (optional) Pollutant loading rate data tables Impervious terrain factor data tables Pollutant reduction BMP data tables (optional) Point source facility locations and loads (optional). PLOAD was designed to be generic so that it can be applied as a screening tool in a wide range of applications including NPDES stormwater permitting, watershed management, or reservoir protection projects. The application’s organization and structure facilitates modification and customization. It was designed to be an analytical tool for end users.
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This note was uploaded on 12/24/2011 for the course CEE 5734 taught by Professor Moglen during the Spring '11 term at Virginia Tech.

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2002_05_10_BASINS_b3docs_PLOAD_v3 - PLOAD version 3.0 An...

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