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.

Engineering 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.

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.

Real-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

  • EFDC_Explorer8.2 Release

    The latest EFDCPlus/EFDC_Explorer Modeling System, version EE8.2, has now been released. This update of DSI’s hydrodynamic, sediment transport and WQ modeling tool comes with enhancements to better support Sandia National Lab’s developments to EFDC, namely the SEDZLJ sediment transport model, and the Marine & Hydrokinetics module, and much more. 

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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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  • 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 the dredging. The model accurately reproduces the flow dynamics inside and outside of Pearl Harbor and will be used for a planning…

  • 35th NALMS International Symposium

    Paul Craig, President of DSI, made a presentation 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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  • VACI Conference 2016

    DSI President Paul Craig gave a presentation at the recent Vietnam Water Cooperative Initiative. The conference theme was “Managing Transboundary Waters”, and Mr Craig described experience using H-ADCP for measuring flow at locations where upstream data is unknown and application at international boundaries. 

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  • Little Bow River Water Quality Study

    Alberta Environment and Parks recently awarded DSI the contract for a hydrodynamic and water quality model of the upper Little Bow River main stem, including the Twin Valley Reservoir, and its tributary Mosquito Creek. DSI is using EFDC for the set-up, calibration, validation and implementation of this in-stream water quality model.