Preliminary Design for Dredged Material Placement Physical Modeling Facilities


Book Description

The feasibility of performing laboratory experiments to aid in the modification and enhancement of existing numerical models for predicting the physical fate of dredged material discharged into open water is addressed. First, appropriate scaling laws are investigated to determine if prototype dredged material disposal behavior can be accurately simulated in a physical test facility for various cohesive and noncohesive sediments. Information gained from this investigation is used to determine the general design requirements of the test facility. These requirements include the types of equipment and measurement techniques required to monitor rates of cloud entrainment, rates of spreading on the bottom, disposal material properties, suspended sediment concentrations, and other parameters of interest. Typical testing scenarios for various discharge conditions are included.
















Dredging Research


Book Description




Dredged-material Disposal System


Book Description

An ensemble of analytic tools is used to identify capacity expansion alternatives for the Delaware River dredged-material disposal system. Characteristics of the river and riparian area are stored and analyzed with a geographic information system. Site attractiveness maps produced with these data yield an array of potential expansion sites. The least-costly schedule for acquisition of these sites is identified with branch-and-bound enumeration. For the enumeration, the operation cost of alternative expansion plans is evaluated with a network-flow programming model of the disposal system. (Author).




Guidelines for the Sampling and Analysis of Dredged Material Intended for Disposal at Sea


Book Description

The guidance contained in this publication addresses the selection of substances of concern and effects to be determined, field sampling, and physical, chemical and biological analysis, as well as guidelines for the sampling of sediment intended for disposal at sea and the selection and analysis of physical and chemical parameters for the assessment of dredged material quality.--Publisher's description.




Research Considerations of Physical Factors Relevant to Disposal of Contaminated Dredged Material


Book Description

The US Army Corps of Engineers is considering the initiation of five research areas directed toward improving analytical methods and field monitoring procedures related to the physical aspects of disposing and confining contaminated dredged material. These research initiatives are: (a). Evaluation of critical shear stress. Theoretical and mathematical investigations will be conducted to develop the best methodology for calculating shear stress. Field measurements will be performed to obtain data sets for verification of theoretical results. (b). Fate and stability of dredged material disposed in open waters. This research will involve an ensemble of existing numerical models in developing a standard application framework for simulating the hydrodynamic/sediment interactions in offshore and estuarial environments. Standardized techniques and equipment will be developed for monitoring open-water disposal sites. (c). Suitability of material for capping contaminated dredged material. Research will combine integrated field tests and physical and numerical model investigations to establish a standard methodology for the design and placement of stable caps under varying physical, chemical, and biological conditions.