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Staff
Listed below are the members of HydroLogics team who are ready, willing and able to help clients with the toughest water resources management problems. ________________________ Daniel P. Sheer is the founder and President of HydroLogics. Dr. Sheer has devoted his professional career to improving water management. After receiving his Ph.D with honors from the Johns Hopkins University in 1974, he became the Planning Engineer, and then the Technical Director of the Interstate Commission on the Potomac River Basin. In these capacities, he designed the technical work plan for the Washington Metropolitan Area 208 Plan (water quality management), and led the technical development effort that provided a long term water supply solution for the same region. He was the first Director of CO-OP, the new institution designated to implement that plan. In 1985 Dr. Sheer founded Water Resources Management, Inc., now renamed HydroLogics. He has been directly involved in the majority of HydroLogics' projects, and was instrumental in the creation of the Southern Nevada Water Authority and the Kansas River Water Assurance District. For the past decade, Dr. Sheer has been closely involved in planning and operations for the Everglades, Lake Okeechobee, the Everglades Agricultural Area and the Lower East Coast through contracts with the South Florida Water Management District. Dr. Sheer has done pioneering work in the development of water resources modeling technology and the use of Computer Aided Negotiation and Operations Exercises. His work on HydroLogics' OASIS modeling system led to a U.S. Patent. He has received Best Journal Paper citations from both AWWA and ASCE, was a founding member of the National Research Council's Water Science and Technology Board, and serves on the NRC's Committee to review the Florida Keys Carrying Capacity Study. Brian J. McCrodden is Vice President and Business Manager of HydroLogics. Prior to joining HydroLogics in 1989, Mr. McCrodden spent 10 years with the Research Triangle Institute. At this nonprofit contract research firm he specialized in the integration of water resources systems, including reservoir operations and hydroelectric generation, and in the optimization of pump station operations. Since joining HydroLogics he has been the project manager for several major, multi-disciplinary efforts. Among these was a multi-year project to develop a basin-wide simulation-optimization model with which to analyze the allocation of benefits associated with the water resources of the Savannah River basin. Currently Mr. McCrodden is assisting the State of North Carolina, Dominion Generation, The Nature Conservancy, and other clients in the development of a similar suite of simulation-optimization models with which to evaluate reservoir operations throughout the Roanoke River basin. He is also involved in the federal relicensing of several other hydropower projects. For the City of Rocky Mount, N.C., Mr. McCrodden developed a drought management model which uses multiple, equally-likely, inflow forecasts to generate probabilistic estimates of future reservoir storage given user specified demand projections. This model is being used for real-time drought management (i.e., deciding when or if to impose demand restrictions) as well as for capacity expansion planning. Dean Randall, Senior Engineer, has developed, written and used water resource-related models, making them represent reality, since 1974. These models have taken into account many aspects of water resources management, including stream hydrology and hydraulics, floodplain analysis, ground water flow and contaminant transport, storm water management, and at HydroLogics, supply system operations. Dr. Randall's specialty is using operations research techniques in writing models that water managers can use in making planning and operating decisions. He led HydroLogics' original development of the modeling system, OASIS, which integrated optimization in the model. He has been the lead modeler in many of HydroLogics' projects. Prior to the development of OASIS there were the PROSIM, SANJASM and SANTUCM models for the Bureau of Reclamation, the Southern Nevada supply system model, the Eastern Irrigation District model, the Savannah River model, and the Yellow River (China) model. Recently he has completed two modeling projects in South Florida. The first of these was OSM, built for the Corps of Engineers, which used OASIS techniques. The second was OASIS/ORM, in which OASIS was integrated with the South Florida Water Management District's object-oriented routing model, ORM. Tony Pulokas, Engineer, joined HydroLogics in 1996. Since then, he has been the primary developer of OASIS, HydroLogic's generalized modeling tool. He has developed the Operations Control Language (OCL) from a novel idea into a powerful, fully featured tool in action. He has also worked to make several existing computer models (such as groundwater, unsteady-flow, and water-quality models) integrate with OASIS. Mr. Pulokas has been involved in the application of OASIS to studies of many water systems, including Alameda County Water District, Zone 7 Water District, the CVP/SWP, the Stanislaus River, and the New York City watershed. One of the most demanding applications he worked on was a simulation of PG&E's hydroelectric system, which required the development of an efficient way of simulating real-world decision making that spans a long time range. Before coming to HydroLogics, Mr. Pulokas was an intern at the Hydrologic Engineering Center of the U.S. Army Corps of Engineers, where he developed models of water supply reservoirs in Arizona using HEC-5 and a spreadsheet-based model of his own design. As an intern at the Water Resources Division of the U.S. Geological Survey, he worked on the verification of an unsteady flow model (FEQ) being applied in DuPage County, Illinois. For his master's thesis at the University of California-Davis, Mr. Pulokas analyzed the reliability of a reservoir system for the maintenance of a riparian vegetation corridor in Arizona, using an intermittent synthetic flow model. Steven Nebiker, Engineer, joined Hydrologics in 2002. Prior to that, Mr. Nebiker spent most of his professional years with Malcolm Pirnie, Inc., an environmental engineering consulting firm. His experience covers a broad range of water resources management issues, including water and wastewater treatability studies, water conservation, drought (risk) management planning, and facilities planning. Since joining Hydrologics, he has led development of a system-wide simulation and planning model as part of the hydropower relicensing effort in the Yadkin River basin. Through modification of the Roanoke River Basin Operations Model, he has also helped evaluate the impacts of proposed interbasin water transfers associated with the siting of a new Dominion Generation power plant.
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