(WCS) and its Modeling Extensions

choppedspleenMécanique

21 févr. 2014 (il y a 3 années et 7 mois)

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TMDL Modeling Toolbox

Watershed Characterization System
(WCS) and its Modeling Extensions

Brian Watson

Tetra Tech Inc.

TMDL Modeling Toolbox
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WCS

What Is WCS?


Customization and enhancement of EPA BASINS
for EPA Region 4


Uses ESRI ArcView
-
GIS 3.x as a platform


Desktop system


Automated characterization report using spatial databases


Differences

between BASINS and WCS


At present, WCS uses only EPA region 4 data, but can be
customized for any state


WCS supports various extensions such as Sediment tool,
Mercury tool, SWMM, NPSM and LSPC


WCS does not support

PLOAD and SWAT

TMDL Modeling Toolbox
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WCS

WCS Uses


Basic system (core)


Characterize watersheds


Evaluate water quality conditions


Assess potential sources of impairment


Enhanced system


Add Extensions which increase WCS capabilities



In general, WCS is a repository for watershed
data and assessment tools to support TMDL
and other environmental programs

TMDL Modeling Toolbox
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WCS

WCS Characterization Reports

Automated reports

Maps and Tables

Environmental Data

Tools

TMDL Modeling Toolbox
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WCS

WCS Extensions

Core watershed data

and assessment tools



Additional Menu functions



Additional Datasets



Additional System files



Supported Models

Extensions

TMDL Modeling Toolbox
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WCS

WCS Extensions

Models



Sediment tool



Mercury tool



SWMM model GIS interface



NSPM model GIS interface



LSPC model

Utilities



NHD download tool



Manual and auto delineation watershed tool



WRDB extension

TMDL Modeling Toolbox
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WCS

Sediment Tool


Overview


Input



BMP




Stream




Road




Elevation




Soil


Land Use

-

Erosion Maps

-

Sediment Delivery Maps

-

Sediment Delivery to
Assessment Points

-

Automated Reports
(Maps and Tables)


WCS Core +
Sediment Tool


Output

USLE Equation

4 Sediment Delivery
Methods

Transport Routing
Algorithm

TMDL Modeling Toolbox
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WCS

Sample Results: BMP & Erosion
-

Little River
Watershed K, GA



Before
, no BMP, erosion =
1032 US tons.

Dark orange
color indicates high Erosion.


After
, applying a BMP to row
crop areas, P = 0.65, erosion =
851 US tons
, an 18% reduction.

BMP area

TMDL Modeling Toolbox
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WCS

Algorithms in the WCS Mercury Extension

Mercury Tool: Overview

Sediment Yield

Calculation

Hydrology

Calculation

Soil Mercury

Concentration

Mercury Load



Deposition on water and impervious surfaces



Loads from runoff and sediment (pervious surfaces)



Loads from point sources

Land use and USLE

parameters

Delivery

algorithms

Local climate,

land use, and soil

Chemistry

algorithms

Dry + wet

deposition

Hydrology

algorithms

TMDL Modeling Toolbox
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WCS

Mercury Tool: Sample Results

Mercury Loading in Savannah River Basin

TMDL Modeling Toolbox
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WCS

SWMM GIS Interface: Overview

WCS GIS
+

VB Interface
+
SWMM Model
= WCS SWMM

Rainfall.dat

Runoff.dat

Transport.dat

SWMM Model

(PCSWMM)

Input Text Editor

Output Visualization

Files.ini

Land use

Stream Network

Station Rainfall

Data

WCS GIS Interface

VB Interface

PCSWMM

TMDL Modeling Toolbox
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WCS

SWMM GIS Interface: Link to PCSWMM



PCSWMM was developed by Computational Hydraulics
International
(http://www.chi.on.ca)



SWMM blocks (modules) are represented by graphic objects.

TMDL Modeling Toolbox
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WCS

WCS
-
LSPC GIS Interface: Overview



WCS
automatically prepares LSPC database (shapefiles
and MS Access tables) for delineated watersheds.



LSPC uses WCS prepared database to generate model
input files.

One
-
way

WCS (ArcView GIS)

LSPC (MapObjects and MS Access)

TMDL Modeling Toolbox
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WCS



WCS is an extremely versatile framework for
environmental databases and models



WCS (and BASINS) can be customized to many
different uses beyond just TMDLs




Conclusions:

TMDL Modeling Toolbox
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WCS

How to Obtain WCS and Its Extensions

WCS Web Site:

http://wcs.tetratech
-
ffx.com

TMDL Modeling Toolbox
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WCS

WCS Web Site

WCS Web Site

TMDL Modeling Toolbox
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WCS

WCS Web Site

Download WCS Documentation

TMDL Modeling Toolbox
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WCS

WCS Web Site

Download WCS Data by Map or HUC

TMDL Modeling Toolbox
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WCS

Demonstration of

WCS Extensions


TN
-
WCS Extension



Will show how individual states can customize WCS
(Tennessee Example)



Perform a simple watershed characterization with
Tennessee specific datasets

WCS to LSPC Extension



Use Flint Creek Watershed (Alabama) as example