A reservoir is usually built to provide flood control, water supply and irrigation, recreation, or their combinations by blocking a river via embankment dams (Figure 1). A reservoir may have…
A reservoir is usually built to provide flood control, water supply and irrigation, recreation, or their combinations by blocking a river via embankment dams (Figure 1). A reservoir may have…
As a theory-based infiltration method, Geen-Ampt is widely used in hydrologic modeling since its parameters are easy to acquire, especially for those project sites without monitored data for model calibration.…
In HEC-RAS 2D Rain-on-Grid (ROG) modeling, three layers are needed to model the infiltration loss and the procedures to create the three layers have been discussed before. Land Cover Layer…
In addition to loss through infiltration, during a precipitation-runoff process other losses may need to be accounted for as well, which include canopy interception, surface depression storage, and evapotranspiration (ET).…
Initial and Constant Loss Method and Deficit and Constant Loss Method are two common infiltration methods in HEC-HMS and they share the same underlying concept, simply put, after the "initial…
HEC-DSS, USACE Hydrologic Engineering Center Data Storage System, is a type of database system to store data primarily for hydrologic and hydraulic modeling (*.dss file). HEC-DSSVue is a tool to…
HEC-DSS, USACE Hydrologic Engineering Center Data Storage System, is a type of database system to store data primarily for hydrologic and hydraulic modeling (*.dss file). HEC-DSSVue is a tool to…
Modified Puls Routing, also known as storage routing or level-pool routing, is a commonly used reach (channel) routing method in HEC-HMS. Modified Puls Routing is based on continuity equation. In…
A culvert is a closed conduit with a relatively short length connecting two open channels or water bodies. From a hydraulic analysis perspective, usually a culvert does NOT have too…
For unsteady state 1D and 2D HEC-RAS models, initial conditions must be set up appropriately to not make the model crash or become unstable at the beginning of the modeling.…