Larry Theller Bernie Engel Youn Shik Park Purdue University GLRI Project Corps of Engineers 516(e) Program. May 17-18, 2011

LID Hydrologic Analysis - CN Better interoperability  Better Editing of Scenario  Expose CN and EMC  Desktop L-THIA  Add LDC/ STORET  New tool to model BMP effects Collaboration with Institute for Water Resources, Michigan State

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

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

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Low-Impact Development (LID) An approach to land development to mimic the pre-development site hydrology to: 1)Reduce volume of runoff 2)Decentralize runoff, diffusing flows into smaller retention/detention areas 3)Improve water quality 4)Encourage groundwater infiltration

 Minimization –Reduce imperviousness –Soil Compaction  Storage, Detention & Filtration  Rain gardens  Drainage swales  Green roofs  Porous Pavement  Conservation  Forest/Woods  Infiltrable Soils LID Major Components 1. Conservation (Watershed and Site Level) 2. Minimization (Watershed and Site Level) 3. Integrated Management Practices (Site Level)

L-THIA LID Basic Tool Application: Targets preliminary goals at the watershed and site level Reduce imperviousness Conserve infiltratable soils Conserve functional / sensitive landscape Minimize land disturbances Anticipate need for other LID practices to reduce NPS and stormwater volume

Purdue University is an Equal Opportunity/Equal Access institution. Run L-THIA LID Model effect of BMP/ landuse change Map or HUC Delineate area of Interest EDIT L-THIA Scenario LDC & LOADEST Calculate Estimated Load Set Goals Under Construction

Purdue University is an Equal Opportunity/Equal Access institution. Load Duration Tool with LOADEST

1. Select State 1. Select State (a). (Indiana and Wisconsin States are available, so far.) 2. Three ways to find USGS gauging station 2. Three ways to find USGS gauging station : Type address or ZIP (b), Through Google Map interface(c), Type Station Number (d). a b c d

Station was found by address, FOX RIVER AT BERLIN, WI “FOX RIVER AT BERLIN, WI” Click this button to derive Flow Water Quality Flow and Water Quality data.

a b d The tool gives.. 24 WQ.. Information of pre- selected 24 WQ data (a), Flow.. Information of Flow data (b), Raw data file.. Raw data file of flow and WQ data (c). c LDC Select period to develop LDC (d), and click this button. (period : Jan/1/2008 – Nov/8/2010, WQ : 00530)

flowWQ A simple module works to combine flow and WQ data. Set Water Quality Standard (a). combined data file downloadable Also combined data file is downloadable to use for other models (b). a b

background mode LOADEST can be run with background mode on this page (a). Mean Daily Load It gives Mean Daily Load estimated by USGS data (b). a b Time Series Plot Concentration Plot LDC FDC

Changed by LOADEST result replacedLOADEST result During processing, the figures on the page will be replaced by LOADEST result. InputsOutputs downloadable Inputs and Outputs of LOADEST are downloadable (a). a

Changed by LOADEST result replacedLOADEST result During processing, the figures will be replaced by LOADEST result. Annual Load downloadable Estimated Annual Load File is downloadable (a). Mean Daily Load Mean Daily Load by LOADEST result will be given (b). a b

Purdue University is an Equal Opportunity/Equal Access institution.

For more information and a list of tools: –L-THIA –L-THIA LID –Web-GIS tools (Online LTHIA) for Spatial Hydrologic Analysis

The End Purdue University is an Equal Opportunity/Equal Access institution.