Parmar's experienced staff has a combined 30-years of providing hydrology services to a wide ranging project  portfolio.  From small drainage hydrology to complex regional multi-basin and long-term hydrograph studies, reservoir simulations, and landuse studies, Parmar taylors and delivers the technical expertise according to project requirements.


We employ a wide range of methodologies to perform hydrology studies including HEC-HMS, HSPF, EPA SWMM, spreadsheet accounting analyses, flood frequency analyses, unit hydrograph studies, and soil moisture accounting analyses.




Parmar provides leading hydraulic modeling and design services with a combined staff experience larger than 30-years.  Parmar staff has produced models and designs that provide industry and public benefit for decades to come.


Parmar modeling services include the use of many 1D, 2D, steady and unsteady, open and closed system software applications.


We have more that 20-years of FEMA FIRM flood study experience ranging from regional approximate studies to basin-wide and county-wide detailed zone studies.


Our modeling portfolio extends to 2D with 3D integration that incorporate geologic storage volume and to models that combine 1D channels with 2D and 3D components.  Our 2D modeling experience has produced expert solutions for over 10-years and in cases where previous models lacked full potential.


Parmar staff have helped dozens of agencies and private clients perform the difficult task of providing comprehensive flood protection under changing environements and difficult hydraulic conditions.  We offer our recommendations and solution alternatives based on proven results. Our design portfolio includes hundreds of flood control structures and large bridge and culvert crossings.  Our bridge crossing designs include scour analyses and best management practice recommendations based on the client need.  We specialize in large flood control designs including conveyance, flood detention, flood retention, and energy dissipation.  Our designs have stood the test of time against historic flood events.

chicagoland             (oak park, il)   312.725.6480

norcal                    (Davis, ca)      916.572.6480

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