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

  • 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.

  • 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+ 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.

  • EEMS8.4 Coming Soon

    The latest EFDC_Explorer Modeling System will soon be 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.