Web-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) Swan Creek (Ohio) Flow and Load Duration CurvesFlow
and Load Duration Curves
Slide 3
Slide 4
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
Slide 5
Data requirements and components for analysis in L-THIA Soils
Land use Curve Number values Daily precipitationLocation Runoff
depths NPS pollutants Runoff volumes User supplied information
Performed by L-THIA L-THIA Model
Slide 6
Slide 7
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)
Slide 8
Slide 9
Slide 10
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/
Slide 11
Slide 12
Slide 13
Purdue University is an Equal Opportunity/Equal Access
institution.
Slide 14
Landuse and Soil are automatically entered into
spreadsheet
Slide 15
Tabular and Graphic results Purdue University is an Equal
Opportunity/Equal Access institution.
Slide 16
Web-based Tool for Flow and Load Duration Curve
Development
Slide 17
Web-Based Flow Duration and Load Duration Curve Tool
https://engineering.purdue.edu/~ldc
Slide 18
Google Maps-Based Models Purdue University is an Equal
Opportunity/Equal Access institution.
Slide 19
Flood Conditio ns 100 cfs FDC, LDC and Target Concentration
(2002-2007) for USGS Gauge 04180000, Cedar Creek, IN WQ Target
(0.10 ppm) FDCLDC Target Concentration Enter / Upload Flow and WQ
Data for LDC
Slide 20
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
Slide 21
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