Dynamic Solutions

Hydraulics & Hydrodynamics

Hydraulics & Hydrodynamics

Sep 18, 2013

Hydraulics & Hydrodynamics Services: DSLLC is nationally recognized for our many high quality model engineering applications using the Environmental Fluid Dynamics Code (EFDC).

Dynamic Solutions, LLC (DSLLC) is a leader in the field of 2 and 3-dimensional surface water modeling. Our hydraulic, hydrodynamic, water quality, and sediment transport models provide critical information for assessments of flow, sea-level rise, pollutant loading, sediment dynamics (including contaminated sediments), flooding, thermal discharge impacts, water supply, nutrient cycling, and ecological conditions in surface waters. We have aided in the development of the USACE Coastal and Hydraulics Lab’s ADaptive Hydraulic (ADH) model and are nationally recognized for our numerous advanced applications of the Environmental Fluid Dynamics Code (EFDC) model.

Dynamic Solutions recently developed a 3-D EFDC hydrodynamic model of the St. Lucie Estuary to evaluate the effect of Lake Okeechobee releases scenarios on salinity, submerged aquatic vegetation and oyster beds. We have used EFDC to develop a 3-D model of the Suwannee River and estuary to assess of the impact of salinity on oyster beds in support of the Suwannee River Water Management District and US Geologic Survey. Dynamic Solutions used EFDC to construct a model to assess of the impact of stormwater discharges on salinity and subsequently the effects on coral reefs in the nearshore coastal waters of Hawaii. In each of these applications we used our innovative pre- and post-processing software, EFDC_Explorer, to facilitate model setup, validation, and analysis of the model results.
DSLLC has experience with public domain hydrodynamic models supported by the US EPA (Environmental Fluid Dynamics Code – EFDC), the US Army Corps of Engineers (HEC-RAS, CE-QUAL-W2, ADH), and the National Weather Service (FLDWAV). DSLLC engineers have worked jointly with the US Army Corps of Engineers Coastal Hydraulic Laboratory (CHL) to develop the code and apply the next-generation Adaptive Hydraulics Model (ADH) for hydrodynamic and ecological investigations in many systems, including the Sacramento – San Joaquin Delta and Upper Mississippi River.

Dynamic Solutions’ staff have experience developing models across a wide range of spatial and temporal scales and for a variety of end purposes including, but not limited to: sea-level rise, sediment dynamics, contaminated sediment tracking, scour analysis, navigation, water quality studies, salinity studies, and species-specific and system-wide ecological studies. Event-driven models have been developed to investigate navigational accidents and to analyze scour which contributed to collapse of a bridge over a stream near Philadelphia. We developed a model to study how changes in releases from Lake Okeechobee affect salinity and oyster habitats in the Caloosahatchee estuary and the St. Lucie estuary. Multi-year simulations of hydrodynamics were developed to ascertain the effects of sea-level rise over the entirety of San Francisco Bay and the Delta. Many hydrodynamic models are developed in conjunction with a watershed model to provide flow transport data needed for the receiving-water sediment transport and water quality models. This watershed approach creates an integrated surface water model framework so changes to any part of the system may be modeled and their effects analyzed. DSLLC has developed hydrodynamic models for applications to sediment and/or water quality management studies for reservoirs in Texas and Oklahoma; estuaries in Texas, Florida, and California; and coastal waters in Alaska, Hawaii, and St. Croix in the US Virgin Islands. Our 3-D models provide our clients the highest level of technical fidelity to system processes and ensure a robust tool to evaluate management alternatives to determine point and nonpoint source load allocations, including Total Maximum Daily Loads (TMDLs) required by the Clean Water Act, to meet water quality goals.

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