SDI’s major strength is hydrologic modeling. We have extensive experience in developing and applying models to evaluate a wide range of hydrologic problems. Our professionals use numerical models as excellent tools to assist you in making decisions about your water resource or contamination issues.

     These are the types of hydrologic models that we do best.

  • Groundwater
  • Surface water
  • Variable-density (saltwater intrusion)
  • Contaminant transport
  • Integrated surface and groundwater
     Senior SDI staff has ‘grown up’ with the hydrologic modeling industry, which exploded with the growth of the personal computer industry. The first models were analytical models that required manual calculations. If you understood those calculations, you understood groundwater. Then along came computers, providing modelers with a great tool. Early groundwater models included the Trescott model and PLASM, which led to the ubiquitous MODFLOW, now used worldwide.

     New generations of models are evolving, such as the integrated hydrologic model that can better represent what really happens in nature. SDI professionals were on the leading edge of this integrated modeling technology in 1989 as a co-developer of the first integrated model in Florida. Leaving behind HSPF and ISGW, we use our experience in employing publicly available integrated hydrologic models, such as MIKE SHE, to solve complex surface water and groundwater interactions.

     Recognizing the importance and potential of brackish water as an alternative water supply, we expanded our expertise to use SEAWAT, the USGS code for variable-density groundwater flow and transport, in coastal areas to assess water supply potential for new and alternative water supplies.