HEC-HMS is the next generation hydrologic model developed by the Hydrologic Engineering Center. Its intent is to replace HEC-1, and it features many of the same modeling capabilities as HEC-1 and additional capabilities such as the MODClark quasi-distributed (2D) hydrologic model. WMS has a fully-featured interface to the MODClark hydrologic model and includes documentation and step-by-step tutorials showing how to setup MODClark and other types of HMS models.