Icon-DropIntroduction

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

  • Lower Athabasca Water Quality Modeling

    DSI are supporting Alberta Environment and Parks with a detailed 2D hydrodynamic, sediment transport, toxics, and water quality model development for the Lower Athabasca River. This study will also include a fish habitat analysis and model sensitivity analysis.

  • EEMS8.4 Out Now

    The latest EFDC_Explorer Modeling System has been released, with EE8.4, EFDC+ and CVLGrid1.1 in one package. This update to DSI’s hydrodynamic, sediment transport and WQ modeling tool comes with many enhancements, including new habitat analysis tools (IFIM) and time and rule controlled hydraulic structures. A free Demo version is available for download.

  • Salinity Study for Lower St Johns River, Florida

    DSI supporting the next phase of an evaluation of the Jacksonville Harbor Navigation Project for USACE. The study uses EFDC+ with Sigma-ZED for hydrodynamic and salinity modeling to evaluate changes to the salinity in the Lower St Johns River.

  • 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.