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GIS and Fisheries: Watershed and Lake Analysis NREM 546: Graduate Project
By: Steve Konrady
Common Fisheries Maps
Bathymetric – highlights bottom contours
Uses: • Surface Area • Max Depth • Average Depth • Volume • Structural Features
Common Fisheries Maps
Sediment Map – highlights sedimentary deposits and depth loss
Uses: • Sediment Depth • Deposit Locations • Sediment Volume • Comparisons
Common Fisheries Maps
Watershed – highlights watershed size and features
Uses: • Watershed Area • Streams/Stormwater • Watershed:Lake Area • Watershed Land Use • Control Structures
Materials Required
• Elevation Information – Digital Elevation Model (DEM)
o Many publicly available sources: USGS, State of Iowa
o Shuttle Radar Topography Mission (STRM) used in class
o Light Detection and Ranging (LIDAR) (*bare earth*)
o Range of resolutions (both X-Y and Z)
• Satellite Imagery – Background Image
o Bing Maps basemap (ArcGIS), Orthoserver
o Provide background for better looking maps
o Determine shoreline, area features, etc.
• Other – land use, land cover, gathered or existing data
o Some states and areas have more information available
o Save work wherever possible!
Important GIS Tools
• Create Features and associated tools
o Used to digitize shorelines, subtract islands
o Can digitize watershed area and stream lengths
• Spatial Analyst
o Integrated Hydrology toolset for flow measurements, watershed delineation, stream delineation
o Automates many processes effectively
• Data Management
o Converting raster to feature
o Clipping raster by feature
Methods: Bathymetry/Sediment
Methods: Bathymetry/Sediment
Finished Products: Bathymetry/Sediment
Methods: Watershed
Methods: Watershed
Methods: Watershed
Analysis: Watershed
Analysis: Watershed
Ground Methods: Watershed
Analysis: Watershed
Finished Products: Examples
Finished Products: Examples
Questions?