الفهرس 
AbstractOnly 14 pages are availabe for public view
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Abstract
Dredge quantity estimation is a critical issue in dredging projects as it has direct impact on the project process and cost. Hydrographic survey is the main tool for measuring the horizontal coordinates and vertical levels of the sea bed and subsequently quantity estimation. Heave is one of the factors that did not mentioned by “IHO Standards for Hydrographic Survey, (2008)” to be measured in its specifications. They only mentioned that for Sweep Systems (multi-transducers arrays): “Once the heave on the transducers exceeds the maximum allowable value in the uncertainty budget, sounding operations should be discontinued until sea conditions improve”. In dredging works, some consultants insisted on using at least heave motion sensor in doing the bathymetric survey works especially for harbors dredging works in spite of the survey works will cover all aspects of IHO special order and/or order “A” classes. No previous study was done to see how the effect of Heave on the estimated dredged quantities. The current study investigates the impacts of heave on the computed dredged quantities in harbors in Damitta Port, Egypt, maintenance and Capital dredging works and in Capital dredging work for the new Bobyian Seaport in Kuwait. This thesis contains seven chapters arranged as follows: Chapter (1): Introduction Presents a general introduction, objectives and scope of the study for which this thesis was prepared. Chapter (2): GPS Nets This chapter discusses Global Positioning System, GPS Signals, GPS Biases, Relative Positioning Modes and Wide-Area Differential GPS Chapter (3):Depth Measurement Techniques is an introduction to depth measurement techniques , Principles of acoustic depth measurement sensitivity of sound speed and single beam quality control calibrations Chapter (4): Motion Sensors started with a brief description of ship motions and vessel attitude measurements. motion sensors, Single Beam Position Correction for roll , pitch and Vertical Datum in Hydrographic Survey are described. Chapter (5): Single Beam Hydrographic Survey Present Raw data editing, TIN Interpolation Technique and Hydrographic Survey , Dredging Works and Dredge Volume Computation Techniques. Chapter (6): Practical Study is devoted to the practical study, First Test Hydrographic Survey across Damietta Port and Second Test Hydrographic Survey across Channel of Boubyian Seaport Chapter (7): Conclusions and Recommendations Highlights summary of the thesis outcomes, conclusions, and recommendations for future research.