Transcript Bernie Engel Purdue University Web-based DSS Tools • Online Watershed Delineation • L-THIA & L-THIA LID • Watershed Management Systems – Burns Ditch (Indiana) – Swan.

Bernie Engel
Purdue University
Web-based DSS Tools
• Online Watershed Delineation
• L-THIA & L-THIA LID
• Watershed Management Systems
– Burns Ditch (Indiana)
– Swan Creek (Ohio)
• Flow and Load Duration Curves
L-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
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)
 Conservation
 Storage, Detention & Filtration
 Forest/Woods
 Rain gardens
 Infiltrable Soils
 Drainage swales
 Minimization
– Reduce imperviousness
 Green roofs
 Porous Pavement
– Soil Compaction
https://engineering.purdue.edu/mapserve/LTHIA7/lthianew/lidIntro.htm
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
Purdue University is an Equal Opportunity/Equal Access institution.
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.
Enter / Upload Flow and WQ Data for LDC
100 cfs
Flood
Conditio
ns
FDC
LDC
WQ Target
(0.10 ppm)
Target Concentration
FDC, LDC and Target Concentration (2002-2007) for USGS Gauge 04180000, Cedar Creek, IN
Retrieve USGS Flow Data and Enter /Upload WQ
Data for LDC
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
Click this button to
Generate FDC only
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:
https://engineering.purdue.edu/~ldc