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Evaluation of High-resolution Digital Elevation Models For Creating Inundation Maps

Wonkovich, Mark A
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1167945221

Abstract Details

2007, Master of Science (MS), Bowling Green State University, Geology.
The Village of Pemberville, Ohio experiences frequent flooding. Accurate flood maps are needed to reduce damage caused by these floods. Photogrammetry software was used to create a high-resolution DEM using two overlapping USGS NAPP aerial photographs each with resolutions of 1:40,000 and scanned at 1800 DPI. The resulting DEM had a resolution of 0.57 m (1.87 ft) and a minimum detectible elevation of 0.95 m (3.1 ft). HEC-GeoRAS was used to produce cross-sections of the North Branch of the Portage River and an inundation map of a 100-year flood from the high-resolution DEM. The inundation map was compared to a 100-year flood inundation map produced with ground surveyed cross-sections provided by TMACOG and the FIRM for Pemberville. The datasets produced flood profile elevations of 196 m (643 ft) along the North Branch of the Portage River in the Village of Pemberville, which is the same as on the FIRM. When compared areally, the high-resolution DEM data produced larger flood extents than both the surveyed data and the FIRM of the village due to the length and distance of the cross-sections. Different lengths and large distances between cross-sections can cause large changes in the width of the bounding polygon, not accurately representing the floodplain, and limiting the extent of the estimated inundation.
Enrique Gomezdelcampo (Advisor)
High-resolution DEM

Recommended Citations

Citations

  • Wonkovich, M. A. (2007). Evaluation of High-resolution Digital Elevation Models For Creating Inundation Maps [Master's thesis, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1167945221

    APA Style (7th edition)

  • Wonkovich, Mark. Evaluation of High-resolution Digital Elevation Models For Creating Inundation Maps. 2007. Bowling Green State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1167945221.

    MLA Style (8th edition)

  • Wonkovich, Mark. "Evaluation of High-resolution Digital Elevation Models For Creating Inundation Maps." Master's thesis, Bowling Green State University, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1167945221

    Chicago Manual of Style (17th edition)

bgsu1167945221
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© 2007, all rights reserved.
This open access ETD is published by Bowling Green State University and OhioLINK.