Watershed Management Decision Watershed Management Decision Support Using Web-Based Support Using Web-Based Hydrological Tools and GISHydrological Tools and GIS

Bernard A. EngelBernard A. EngelJin-Yong ChoiJin-Yong ChoiLarry ThellerLarry Theller

Agricultural and Biological DepartmentAgricultural and Biological DepartmentPurdue UniversityPurdue University

Processes for Hydrologic Impact Processes for Hydrologic Impact Analysis Using Web-GIS ToolsAnalysis Using Web-GIS Tools

Outlet Point Selection Using Web-GIS

Run Watershed Delineation

Watershed Delineation Result

Reflect Land Use Change Using Online Digitizing

Run L-THIA

Runoff and NPS Output/Impact Evaluation

Front PageFront Page

Select Outlet Point Select Outlet Point Main Menu

Layer ControlOn/Off

Map Display

Display ControlZoom in/outPan, Full extent

Auxiliary functions

Reference Map

WD Submit Button

Watershed Delineation and Result Watershed Delineation and Result PagePage

Results Display Results Display

Print and Download PagePrint and Download Page

L-THIA Input Data Preparation for Present L-THIA Input Data Preparation for Present Land Use and Hydrologic Soil GroupLand Use and Hydrologic Soil Group

Buttons for Online ToolButtons for Online Tool

Change Land Use in the Watershed Using Change Land Use in the Watershed Using Online Digitizing ToolOnline Digitizing Tool

Add Low Density Residential, Add Low Density Residential, Commercial, and High Density Commercial, and High Density

Residential AreasResidential Areas

Results Page after the Land Use Results Page after the Land Use ChangeChange

Present Land Use DataPresent Land Use Data

Proposed Land Use DataProposed Land Use Data

Application Buttons forApplication Buttons forHydrological Model OperationHydrological Model Operation

L-THIA Input Page After Changing L-THIA Input Page After Changing Land UseLand Use

L-THIA Results - Runoff TablesL-THIA Results - Runoff Tables

Runoff and Land Use to Evaluate the Runoff and Land Use to Evaluate the Land Use Change Impact on Land Use Change Impact on

HydrologyHydrology

NPS Pollutant LoadingNPS Pollutant Loading