HEC-HMS is a hydrologic modeling software designed to simulate precipitation-runoff processes in watershed systems. It can be used for a wide range of problems from large river basins to small urban watersheds. The model represents watersheds using elements such as basins, which are areas where precipitation drains to a common outlet, sub-basins, reaches, which convey streamflow, and junctions, which combine upstream flows.

1. Name of presentation
Company name

2. What is HEC-HMS?
• HEC-HMS is designed to simulate the
precipitation-runoff processes of dendritic
watershed systems
• it is designed to be applicable in a wide
range of geographic areas for solving a
broad range of problems
• This includes larger river basin water
supply and flood hydrology to small
urban or natural watershed run off

3. Hydrologic Elements Used
• Basin
– Any area of land where precipitation collects
and drains off into a common outlet, such as
into a river, bay or other body of water
• Sub-basin
– the subbasin element is used to represent
the physical watershed
• Reach
– the reach element is used to convey stream
flow downstream in the basin model
• Junction
– the junction element is used to combine
stream flow from hydrologic elements located
upstream of the junction element