Hazard Analysis

Hazard describes a situation that threatens life and properties. Our work concentrates on natural hazards related to water including floods, drought, tsunamis, storm surge, and cyclones. The hazards are quantified using advanced modelling techniques together with other assessment methods. Key issues when investigating e.g. flood hazards include the delineation of the affected area and the physical forces (flux) in the flooded area. Most often, such data can only be provided by detailed numerical modelling of the hazard.

Our engineers and scientists have extensive experience using proven approaches for investigating hazards. We routinely adopt a multidisciplinary approach, integrating elements of mapping, detailed terrain and site analysis including flood control pathways, hydrologic analysis, hydraulic analysis, analysis of retention/detention basin analysis, sediment transport, and numerical simulations of flood propagation. We combine top level expertise with a suite of state-of-the-art modelling tools and analysis techniques, supplemented with focused field and site surveys. Where required we include the FEMA methodology.

Our services include:

  • Mapping using data ranging from public available SRTM and ASTER over site investigation using accurate differential GPS.
  • Analysis of geomorphology and historical flood analysis.
  • Analysis of hydrology to assess drought and flood frequencies and discharges.
  • Simulation of flood propagation using most advanced modelling technologies.
  • Conceptual development and design of potential flood hazard mitigation measures.
  • Hydraulic analysis.
  • Sediment transport analysis.
  • Scour analysis.
  • Coordination with regulatory and flood control agencies.

Models and analysis techniques used:

  • QuakeGen simulating earth surface movements based on Okadas theory is used to estimate Tsunami sources.
  • Unsteady flow is assessed using DHI MIKE 21 and MIKE FLOOD and other tools in the MIKE by DHI model suite
  • Sediment transport is assessed using the sediment transport and morphology packages in DHI Software.