Disclaimer: This post is a simple introduction to dam breach modeling using HEC-RAS. A H&H modeler should not perform a dam breach modeling task without consulting experienced H&H and geotechnical…
Disclaimer: This post is a simple introduction to dam breach modeling using HEC-RAS. A H&H modeler should not perform a dam breach modeling task without consulting experienced H&H and geotechnical…
Instead of being modeled in 1D HEC-RAS by storage area and inline structure, reservoir and dam can also be modeled in 2D HEC-RAS by storage area + SA/2D connection +…
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…
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…