Web-Based GIS and Decision Support Systems for Hydrological/Water Quality Impact Analysis FAQ
Online Tools Developed or Enhanced by Agricultural and Biological Engineering,
Purdue University with various cooperators and funders
Group 1: Landuse Change Impact on Runoff - Models for EPA Region 5:
(LTHIA variants, LID variant, BMP tools)
Group 2: Hydrologic Models
( load duration curve, groundwater withdrawl)
Group 3: Pesticide interactions (NAPRA)
Group 4: Environmental Managment (EQIP, BeAware, RARE, IWQA)
Group 1 30m LTHIA Select your state
Online: Watershed Delineation and Landuse Change:
Web-GIS tools (Online LTHIA) for Spatial Hydrologic Analysis
NEW - Google Maps Interface:
[ Wisconsin ] [ Minnesota ] [Ohio ] [ Michigan ]
[ Swan Creek, OH ] [ Burns Ditch-Trail Creek ]
"LTHIA 3 " tab runs "SWAT curve number" LTHIA
"LTHIA 2" tab runs "Midwest US calibrated curve number" LTHIA
"LTHIA 1" tab uses standard (adapted TR-55) curve numbers
Indiana uses 2001 NLCD Landuse, SSURGO soils, NHD High Resolution water features, and 10 meter USGS DEM for delineation.
Illinois uses 2001 NLCD Landuse, NHD High Resolution water features, 30 meter DEM
The other models use 1992 Landuse, STATSGO soils, NHD Medium Resolution water features and 30 meter DEM for delineations.
NOTE: If you see a gray box, instead of the usual map display, read FAQ for instruction.
Help Videos, FAQ, Tutorials:
http://cobweb.ecn.purdue.edu/~watergen/owls/htmls/intro0.htm
Online Delineation and LTHIA - High Resolution Version for portion of Indiana Lake Rim
Burns Ditch & Trail Creek Watershed Management System for hydrologic and erosion modeling and BMP assessment
Sediment and Erosion Control Planning, Design and Specification Information and Guidance Tool
Web-based Preliminary Tool for Total Maximum Daily Loading
Long-Term Hydrologic Impact Assessment
Documentation:
http://www.ecn.purdue.edu/runoff/documentation/doc_index.html
Tutorial:
http://www.ecn.purdue.edu/runoff/documentation/tutorial.htm
Spreadsheet Versions:
LGEAN: L-THIA (Local Government Environmental Assistance Network)
Detailed Spreadsheet input http://cobweb.ecn.purdue.edu/runoff/lthia/detailed_input.htm
Advanced LTHIA - Spreadsheet with your EMC (curve numbers) http://www.ecn.purdue.edu/runoff/lthia/advanced_input.htm
LTHIA Impervious - Spreadsheet Model http://www.ecn.purdue.edu/runoff/lthianew/toolim.htm
These models use 30 years of rainfall data, landuse and soil properties
to calculate the change in runoff volume and chemistry due to projected changes in landuse
.
EPA Region 5 Midwest Spatial Decision Support System Partnership
Low Impact Development (LID) LTHIA Spreadsheet Version
http://cobweb.ecn.purdue.edu/~sprawl/LTHIA7/lthianew/lidIntro.htm
http://cobweb.ecn.purdue.edu/~sprawl/LTHIACOMPDAILY/
Welcome to the spreadsheet tool for assessing the long-term hydrological and nonpoint source (NPS) pollution impact of urban sprawl and agricultural land use transitions for any location in the United States. Daily Computation version.
Landuse footprint and wateruse / withdrawal projections
Sponsors include Indiana - Illinois SeaGrant :: http://www.iisgcp.org/
Prototype Load Duration Curve and Flow Duration Curve made from USG data:
https://engineering.purdue.edu/~ldc/JG/duration/main.cgi
Web-based Wellhead Protection Area Defining Tool
Web-based National Agricultural Pesticide Risk Analysis
Farm Management and Pesticide Interactions
Group 4: Environmental Management (EQIP, BeAware, RARE )
RARE
Environmental Sensitivity Index Model
EPA Region 5 Midwest Spatial Decision Support System Partnership
Indiana Water Quality Atlas - with LTHIA link
IUPUI Polis Center - ABE Purdue Project. 
This map is a method of facilitating voluntary communications between the pesticide applicator, the specialty crop grower and stewards of surrounding at-risk habitat to help ensure sensitive areas are protected, while encouraging appropriate pesticide application.
For more information, please Contact Bernard A. Engel, Larry Theller