Richard Rachiele

Richard Rachiele is a Lead Hydraulic Modeler with more than four decades of experience applying numerical modeling techniques to complex water resources challenges involving hydrodynamics, water quality, and sediment transport. He has deep expertise in riverine, reservoir, and estuarine systems, with particular emphasis on the San Francisco Bay and Sacramento–San Joaquin Delta.

Prior to joining GEI, Richard built much of his career at Resource Management Associates, where he extended and applied one-, two-, and three-dimensional modeling tools to support environmental impact analyses, flood protection planning, and large-scale restoration studies. His work has supported major regional initiatives, including the Central Valley Flood Protection Plan, Delta Risk Management Strategy, and numerous tidal marsh restoration projects.

Richard has also played a key role in software and graphical user interface development for U.S. Army Corps of Engineers Hydrologic Engineering Center applications, including HEC-RAS, HEC-ResSim, and CWMS-related tools. He is recognized for combining advanced modeling capabilities with practical application to inform regulatory decision-making and long-term water management strategies.