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OPTIMAL PLACEMENT OF DREDGED MATERIAL FOR WETLAND DEVELOPMENT WITHIN THE CHARLES MILL RESERVOIR A Thesis Presented to The Faculty of the Fritz J. and Delores H. Russ College of Engineering and Technology Ohio University In Partial Fulfillment of the Requirement for the Degree Master of Science by Vito A. Cimino November, 200 1 OHIO UNIVERSITY ACKNOWLEDGEMENTS I would like to thank all of those individuals that were involved in the development of this thesis. I wish to extend my utmost gratitude and thanks to my advisor, Dr. Tiao J. Chang, for without his guidance and support, none of this would have been possible. I would also like to thank Dr. Lloyd Herman and Dr. Chstopher Boone for serving as members on my examining committee and providing me with their insight and suggestions. I would also like to give thanks to David Beekrnan and Rebecca Clark who have been instrumental in seeing this project through to its completion by offering their noteworthy ideas and perpetual support. Finally, I thank my family and friends, for without their encouragement and patience I would have been unable to accomplish this task. Table of Contents Table of Contents ..........................................................................................................iv Table of Tables .............................................................................................................vi .. Table of Figures ........................................................................................................... vn ... List of Symbols and Abbreviations ........................................................................... v111 Chapter I .Introduction ................................................................................................. 1 I .1 Dredging Methods .............................................................................................. 2 1.2 Beneficial Uses of Dredged Material ................................................................. 5 1.3 Use of Geographic Information Systems ........................................................... 6 1.4 Nature of the Study ............................................................................................. 7 1.5 Objectives of the Study ...................................................................................... 9 Chapter I1 .Selected Literature Review .....................................................................13 11.1 Disposal and Placement of Dredged Material .................................................13 11.1.1 Disposal Alternatives ............................................................................. 14 11.1.2 Planning and Design Considerations .................................................1 11.1.3 Environmental Effects ............................................................................ 24 11.2 Surface Interpolators ....................................................................................... 26 11.3 Multicriteria Decision Analysis ...................................................................... 31 11.3.1 Multiobjective versus Multiattribute Analysis....................................... 32 11.3.2 Framework ............................................................................................. 35 Chapter 111 .Theory & Methodology ......................................................................... 37 111.1 Data Acquisition ............................................................................................ 37 . 111.2 Evaluation Criteria.. ...................................................................................... -40 111.2.1 Lake Bathyrnetry .................................................................................. 40 111.2.2 Dredged Channels / Sediment Volume .................................................46 111.2.3 Land Use ...............................................................................................50 111.2.4 Sediment Classification 1 Distribution .................................................-53 111.3 Criterion Weighting .......................................................................................56 111.4 Multiattribute Decision Rules ........................................................................60 111.5 Flood Analysis Using GIs and HEC-RAS .................................................... 63 . 111.5.1 AVRas Application ............................................................................... 64 111.5.2 Water Surface Profile Computation ..................................................... 65 111.2.3 Floodplain Delineation .........................................................................72 Chapter IV .Application and Results ......................................................................... 73 IV.l Evaluation Criteria Generation .....................................................................73 IV.2 Weighting Analysis ....................................................................................... 77 IV.3 Multiattribute Decision Analysis ................................................................... 80 IV.4 Flood Inundation Due to Disposal Sites ........................................................ 86 IV.4.1 Cross Section Constriction ................................................................... 88 IV.4.2 Floodplain Comparison ........................................................................ 95 v Chapter V .Conclusions and Recommendations .......................................................98 V . 1 Conclusions .....................................................................................................98 V.2 Recommendations .........................................................................................100 References ..................................................................................................................102 v1 Table of Tables Table 1.5.1 Physical Features of Charles Mill Lake and Its Watershed ......................11 Table 11.3.1 Comparison of MODM and MADM approaches ....................................34 Table 111.3.1 Scale for painvise comparison ................................................................58 Table IV.2.1 Painvise comparison matrix ...................................................................78 Table IV.2.2 Normalized painvise comparison matrix ...............................................78 Table IV.2.3 Calculated criteria weights .....................................................................79 Table IV.2.4 Consistency ratio estimation ..................................................................80 Table IV.4.1 Initial discharges and their corresponding water surface elevations ......90 Table IV.4.2 Flow area comparisons at record and mean pool levels .........................91 Table IV.4.3 Geometric elements of constricted channel sections ..............................95 Table IV.4.4 Change in inundated area due to reduction in cross sectional area ........96 Table of Figures Figure I .1.1 Main features of the cutter suction dredger (Bray. Bates and Land. 1997)................................................................................................. 4 Figure 1.5.1 Map of Charles Mill Lake and Surrounding Area ...................................12 Figure 11.1.1 Irregular shape of containment area dictated by surrounding terrain ..... 16 Figure 11.1.2 Wetland Design Flow Chart ................................................................... 23 Figure 111.1.1 Sample Locations within Charles Mill Lake in 1998 (Bayes) .............. 39 Figure 111.2.1 Bathymetric map of the Charles Mill Lake ........................................... 42 Figure 111.2.2 Variation in water depth within the Charles Mill Lake ......................... 43 Figure 111.2.3 Schematic diagram of lake bathymetry and depth criteria .................... 45 Figure 111.2.4 Dredged channel locations within the Charles Mill Lake (MWCD) ....47 Figure 111.2.5 Schematic diagram of dredging distance and sediment volume ...........49 Figure 111.2.6 Land use patterns for Charles Mill Lake (MWCD) .............................. 51 Figure 111.2.7 Schematic diagram of land use distance and unsuitable land uses .......52 Figure 111.2.8 Distribution of the percent of sand in the Charles Mill Lake ................ 54 Figure 111.2.9 Schematic diagram of sand content....................................................... 55 Figure 111.5.1 Representation of Terms in the Energy Equation (HEC, 1997)............ 67 Figure 111.5.2 Diagram of the conveyance subdivision method (HEC, 1997)............. 68 Figure IV .1.1 Schematic diagram of the linear transformation approach for criterion standardization........................................................................ 76 Figure IV.3.1 Multattribute decision analysis flow chart ............................................ 82 Figure IV.3.2 Charles Mill Lake shoreline disposal site evaluation............................ 83 Figure IV.3.3 Comparison of SAW model results and MWCD proposed disposal sites ........................................................................................................ 85 Figure IV.4.1 Example of the cross section layout and terrain TIN ............................87 Figure IV.4.2 Inundated areas for 1959 flood ............................................................. 92 Figure IV.4.3 Inundated areas for mean flow .............................................................. 93 Figure IV.4.4 Comparison