Documenting Changes in Lake Morphology of Six Inland Wisconsin Lakes
Track: Water Resources
Authors: Christine Koeller
Lake morphology changes over time. Bottom surveys were once conducted through ice at transect intersections equally spaced over a lake. Second generation maps were produced with graphing sounders but without GPS. Contour maps were hand-drawn. Todays bathymetry maps were created with GPS/Sonar technology (±3cm deviation) for comparison with old maps and Lowrance HDS5 maps. ArcMap 10.0 builds models to compare lake depth and volume change over time (Ho: X1 – X2 = 0) and low vs. high accuracy GPS.