DSI is an engineering, planning, and research & development firm with its headquarters in the US. A Representative Office was established in Hanoi in 2002 to provide the international/national development agencies and international companies with focused and experienced technical and management support.

Icon-AppsEngineering Software

DSI is constantly developing engineering tools to assist hydrodynamic and water quality studies and has gained considerable international acceptance amongst commercial, academic and government users.

Icon-30+Consulting Services

DSI has over 30 years of experience in providing water resources planning, flooding analysis and control, reservoir systems, groundwater flow, toxics transport, and water quality consulting services. DSI offers considerable expertise on a worldwide basis in water resources and environmental projects.

Icon-SydneyReal-time Modeling Systems

DSI has successfully created several Linux-based real-time models (with visualizations between 24-48 hours) including for the hydrodynamics and salinity of the Sydney Harbor, Australia.

Latest DSI News

  • Curvilinear Grid Generation Tool – CVLGrid1.1

    An enhanced 2D orthogonal-curvilinear grid generation tool has been released by DSI. CVLGrid1.1 provides improved user controls, orthogonalization features, telescoping grids and much more. It is now part of the EFDC_Explorer Modeling System and available to try out as part of the EEMS Demo version.
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  • 4th EPRI Thermal Ecology Conference

    DSI presented two papers at the recent Electric Power Research Institute “Thermal Ecology and Regulation Workshop” in Iowa. The papers cover the Real-time modeling and forecasting system developed for Alabama Power Company and a Forced Evaporation study also for APC. The papers will be provided for download after publication.
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  • 35th NALMS International Symposium

    Paul Craig, President of DSI, presentated at the North America Lake Management Society conference in New York for the paper “Sigma-ZED: A Computationally Efficient Approach to Model Highly Stratified Systems with Applications to Lake Washington, WA and Tenkiller Lake, OK”. The paper will be provided for download after publication.
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  • Pearl Harbor Model Development

    DSI recently completed development of an EFDC model of the Pearl Harbor, Hawaii. We supported Sea Engineering International in this work, which will simulate the transport and deposition of suspended sediment caused by dredging. The model accurately reproduces the flow dynamics inside and outside of the Harbor for use in planning assessments.
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  • West Lake Real-time Hydrodynamic and WQ Model

    DSI has recently developed a demonstration real-time model of West Lake, Hanoi. Input data snd simulation results from the EFDC hydrodynamic and water quality model may be viewed on-line at the link provided below.More Info

  • Salinity Study for Lower St Johns River, Florida

    DSI are working with Dynamic Solutions LLC to carry out an evaluation of the Jacksonville Harbor Navigation Project for USACE. The study uses EFDC+ for hydrodynamic and salinity modeling to evaluate changes changes to the salinity in the Lower St Johns River.
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  • Little Bow River Water Quality Study

    DSI recently successfully completed the study for a hydrodynamic and water quality model of the upper Little Bow River main stem, the Twin Valley Reservoir, and its tributary Mosquito Creek. DSI used EFDC for the set-up, calibration, validation and implementation of this in-stream water quality model for Alberta Environment and Parks.
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  • EEMS Now Available

    The new EFDC_Explorer Modeling System has now been released, with EE8.3, EFDC+ and CVLGrid1.1 in one package. This update to DSI’s hydrodynamic, sediment transport and WQ modeling tool comes with many enhancements, including a new toxics sub-model in EFDC+ for SNL’s state-of-the-art sediment model, SEDZLJ. A free Demo version is available for download.
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