Search site: Submit Search Navigation Home WWHM-SWMM Services California Software Free Software Nav Menu 2 Nav Menu 3 Nav Menu 4 Nav Menu 5 Nav Menu 6 Nav Menu 7 Nav Menu 8 MENU Open menu Clear Creek Solutions, Inc. Toggle search bar CART ( ) Search... Submit search You are here: Home > Services > Computer Modeling Computer Modeling WWHM3 WWHM2 HSPF SWMM HEC-RAS FEQ HY-8 Basin PlanningStormwater ManagementLow Impact Development PracticesWater Resources PlanningFlood StudiesExpert Witness Services HSPF Model CertificationStormwater Modeling Approach OptionsThere are four WWHM3 modeling approach options that can be used by a city or county to model urban stormwater systems depending on the level of complexity.