«A thesis presented to the faculty of the College of Arts and Sciences of Ohio University In partial fulfillment of the requirements for the degree ...»
Effects of Channel Network Geometries on Incision Processes and Channel Hydraulics in
A thesis presented to
the faculty of
the College of Arts and Sciences of Ohio University
In partial fulfillment
of the requirements for the degree
Master of Science
Samuel J. Plitzuweit
© 2009 Samuel J. Plitzuweit. All Rights Reserved.
This thesis titled
Effects of Channel Network Geometries on Incision Processes and Channel Hydraulics in
SAMUEL J. PLITZUWEIThas been approved for the Department of Geological Sciences and the College of Arts and Sciences by Gregory S. Springer Assistant Professor of Geological Sciences Benjamin M. Ogles Dean, College of Arts and Sciences
whereas, the dendritic Cherry River CNG favors plucking due to peaked hydrographs.
Restricted flows in the Cranberry River cause downstream fining atop highly resistant sandstones, which maximizes abrasion potentials at the expense of competence.
Gregory S. Springer Assistant Professor of Geological Sciences
I need to acknowledge many people for assisting in my graduate school endeavors. Most importantly, I would like to thank my ever-patient advisor, Dr. Gregory Springer. He provided me the necessary tools to become a successful student and writer. I would like to thank him for giving me financial support and academic guidance over the past two years. I am also deeply indebted to the Department of Geological Sciences at Ohio University for additional financial support. Next, I thank all of my friends for helping me with fieldwork during the summer months: Megan Smith, Alexander Smith, Jessie Truchan, and Matt Borchert. They all worked exceptionally hard, and helped me enjoy beautiful mountain streams. Lastly, I would like to thank my parents for teaching me the importance of work ethics.
List of Tables
List of Figures
2.0 Theoretical Background
2.1 Channel Network Geometry and Basin Hydrology
2.2 Longitudinal Profiles
2.3 Hydraulic Geometry
2.4 Incision Processes
2.5 Chapter Summary
3.0 Research Objectives and questions
3.1 Objective Statement
3.2 Research Questions
4.0 Field Location
4.1 Regional Geology
4.2 Site Selection Criteria
4.3 Watershed Descriptions
4.4 Bedrock Reach Locations
5.1 Field Based Data Collection
5.2 Computer Generated Data
6.0 Field Based Results
6.1 Comparisons of River Cross Sections
6.2 Incision Processes
6.3 Hydraulic Geometry
6.4 Shear Stress and Unit Stream Power
6.5 Chapter Summary
7.0 Modeling Results
7.1 Geomorphic Instantaneous Unit Hydrographs
7.2 HEC-RAS Hydraulic Modeling
7.3 Chapter Summary
8.1 Channel Network Geometry and Hydrological Response
8.2 Channel Network Geometry and Incision Processes
8.3 Channel Network and Hydraulic Geometries
8.4 Implications for Past and Present Research
Appendix A: Drainage Basin Characterization
Table 4.1: Basin Statistics
Table 4.2: Site Location Statistics for Model Reaches
Table 6.1: Empirical Coefficients for the Cherry River
Table 6.2: Empirical Coefficients for the Cranberry River
Table 7.1: Hydrology Statistics for Model Reaches
Figure 1.1: CNGs and Hydrographs
Figure 1.2: Energy Thresholds
Figure 2.1: Abraded Bedforms
Figure 2.2: Plucking Bedforms
Figure 4.1: Regional Geology
Figure 4.2: Longitudinal Profiles of Study Rivers
Figure 4.3: CNGs of Study Rivers
Figure 4.4: Previous Site Locations
Figure 4.5: Site Locations for Hydraulic Models
Figure 4.6: Base Map for Richwood, WV
Figure 5.1: Surveying Equipment
Figure 5.2: Area-distance Functions and GIUHs
Figure 5.3: Methods Flow Diagram
Figure 6.1: Comparison of River Cross-sections
Figure 6.2: Cherry River Incision Processes
Figure 6.3: Cranberry River Incision Processes
Figure 6.4: Drainage Area versus Width Plots
Figure 6.5: Drainage Area versus Depth Plots
Figure 6.6: Drainage Area versus Width-to-depth Ratio Plots
Figure 6.7: Drainage Area versus Hydraulic Radius Plots
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