Web-based Watershed Decision Support and Planning Tools

Bernie EngelPurdue University

Web-based DSS ToolsWeb-based DSS Tools

• Online Watershed DelineationOnline Watershed Delineation

• L-THIA & L-THIA LIDL-THIA & L-THIA LID

• Watershed Management SystemsWatershed Management Systems– Burns Ditch (Indiana)Burns Ditch (Indiana)– Swan Creek (Ohio)Swan Creek (Ohio)

• Flow and Load Duration CurvesFlow and Load Duration Curves

L-THIA ModelL-THIA Model

• Long-Term Hydrologic Impact Assessment– Average annual runoff– NPS pollution

• An overview / screening model

• User friendly tool

• Does not require detailed data input

• Identifies need for more detailed modeling

• Provides "What-If" alternatives evaluation scenarios

Minimization– Reduce imperviousness

– Soil Compaction

Storage, Detention & Filtration Rain gardens Drainage swales Green roofs Porous Pavement

Conservation Forest/Woods

Infiltrable Soils

https://engineering.purdue.edu/mapserve/LTHIA7/lthianew/lidIntro.htm

L-THIA LID (Low Impact Development)

Major Components

1. Conservation (Watershed and Site Level)

2. Minimization (Watershed and Site Level)

3. Integrated Management Practices (Site Level)

Purdue University is an Equal Opportunity/Equal Access institution.

LTHIA-Web with Online Watershed Delineation

Region 5 States, visible on Google Maps ™.Flowshed is calculated from point and landuse and soil characteristics are loaded into model.

https://engineering.purdue.edu/~lthia/

Purdue University is an Equal Opportunity/Equal Access institution.

Purdue University is an Equal Opportunity/Equal Access institution.

Landuse and Soil are automatically entered into spreadsheet

Tabular and Graphic results

Purdue University is an Equal Opportunity/Equal Access institution.

Web-based Tool for Flow and Load Duration Curve Development

Web-Based Flow Duration and Load Duration Curve Tool

https://engineering.purdue.edu/~ldc

Google Maps-Based Models

Purdue University is an Equal Opportunity/Equal Access institution.

Flood Conditions

100 cfs

FDC, LDC and Target Concentration (2002-2007) for USGS Gauge 04180000, Cedar Creek, IN

WQ Target (0.10 ppm)

FDC LDC

Target Concentration

Enter / Upload Flow and WQ Data for LDC

Click this button to Generate FDC only

You can enter USGS gauge number to retrieve flow data Select beginning and

Ending dates

You can select and click here to retrieve USGS flow data

Retrieve USGS Flow Data and Enter /Upload WQ Data for LDC

Summary These tools enable decision makers to formulate

watershed management plans to meet goals

Allows stakeholders to understand impacts of water quantity and quality resulting from land use change

For more information:For more information:

https://engineering.purdue.edu/~ldchttps://engineering.purdue.edu/~ldc