Portland State University. Department of Geography
Daniel M. Johnson
Date of Publication
Master of Science (M.S.) in Geography
Contours (Cartography) -- Data processing, Cartography -- Automation, Runoff -- Northeastern States
1 online resource (153 p.)
Maps of runoff-depth have been found to be useful tools in a variety of water resource applications. Producing such maps can be a challenging and expensive task. One of the standard methods of producing these maps is to use a manual procedure based on gaged runoff data, topographic and past runoff-depth maps, and the expert opinion of hydrologists.
This thesis examined five new automated procedures for producing runoff-depth contour maps to see if the maps produced by these procedures had similar accuracy and characteristics when compared to the manual procedure. An uncertainty analysis was used to determine the accuracy of the automated procedure maps by withholding gaged runoff data from the creation of the contour maps and then interpolating estimated runoff back to these sites from the maps produced. Subtracting gaged runoff from estimated runoff produced interpolation error values. The mean interpolation error was used to define the accuracy of each map and was then compared to a similar study by Rochelle, et al., (1989) conducted on a manual procedure map.
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Bishop, Gary D., "Uncertainty analysis of runoff estimates from runoff-depth contour maps produced by five automated procedures for the northeastern United States" (1991). Dissertations and Theses. Paper 4313.
Plate 1. Long Term Runoff Depth, USGS Manual Map
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Plate 2. Water-Year 1984 Runoff-Depth, USGS Manual Map
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Plate 3. Water-Year 1984 Runoff-Depth (GAGE84)
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Plate 4. Water-Year 1984 Runoff-Depth (LTET)
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Plate 5. Water-Year 1984 Runoff-Depth (LTRP)
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Plate 6. Water-Year 1984 Runoff-Depth (MNLTET)
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Plate 7. Water-Year 1984 Runoff-Depth (MNLTRP)
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Plate 8. Water-Year 1984 Runoff-Depth (REG_R)
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Plate 9. Water-Year 1984 Runoff-Depth (REG_ET)
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Plate 10. Water-Year 1984 Runoff-Depth (MN84RP)