Document type: DU ETD
Collection: Geology Theses  
 
Title An Analysis of Gully and Drainage Basin Relationships in East-Central Wyoming
Author(s) Berry, David A.
School/Department Department of Geography
Institution University of Denver
Degree Type Master's
Degree Name M.A.
Type of Resource text
Degree Date 1987 March
Digital Origin reformatted digital
Rights Statement All Rights Reserved
Reason for Restrictions No restrictions
Type of Restriction No restrictions
Keyword(s) Geography
Geology
Genre Dissertations, Academic
Abstract This research attempts to identify significant statistical relationships between drainage basin characteristics and gully morphology.The drainage basin variables of area, aspect, relief ratio, average slope, elongation ratio, percent bare soil, percent silt and clay content of soil; and the gully variables of length, slope, average width, average depth, averaged width to depth ratio, average cross-section area and volume are measured for 29 first and second order gully and drainage basin net¬works in east-central Wyoming. The basins are located on unmined land adjacent to the Glenrock Coal Company, Dave Johnston Mine. The local climate is semiarid. The gullies have developed in alluvial material that is deposited over the Wasatch and Fort Union Formations, and they are tributary to the Dry Fork Cheyenne River and to the North Platte River. Local vegetation consists of short grasses and sagebrush common to the Northern Great Plains. Data are derived through a combination of field measurement, map analysis and laboratory procedures. Bivariate and multivariate correlation and regression techniques are used to identify significant statistical relationships between basin and gully characteristics. The drainage basin area variable is significantly and positively related to the first and second order gully variables of length, average width, average depth, average cross-section area and volume. Basin area is significantly and negatively related to first and second order gully floor slope. Average basin slope exhibits a significant, positive relationship with first and second order gully length and first order gully volume, and a significant, negative relationship with gully floor slope. Percent bare soil is significantly and positively related to the first order gully variables of length, average width and volume, and is significantly and negatively related to the first order gully slope variable. No other reliable significant relationships are identified. The research findings suggest that gully morphometry results not only from fluvial scour processes, but also from gully wall mass-movement processes. The results also indicate that many of the documented relationships between basin characteristics and hydrologic and erosional processes, for large scale drainage systems may not apply to small scale gully systems.
Handle http://hdl.handle.net/10176/codu:57510
 
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