Bridge scour analysis is often required to design a new bridge or evaluate an existing bridge. Bridge scour depth is a critical bridge design component for foundation calculation. The scouring…
Bridge scour analysis is often required to design a new bridge or evaluate an existing bridge. Bridge scour depth is a critical bridge design component for foundation calculation. The scouring…
In HEC-RAS models, a lateral structure (LS) is often used to establish a connection between 1D river reach (upstream end of a lateral structure) and a storage area/2D flow area/another…
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…
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…