HEC-GridUtil is tool developed by USACE Hydrologic Engineering Center to manage and view gridded data stored in DSS files. The Post 1 of 2 here demonstrates on how to start…
HEC-GridUtil is tool developed by USACE Hydrologic Engineering Center to manage and view gridded data stored in DSS files. The Post 1 of 2 here demonstrates on how to start…
Historical hourly or daily precipitation data in gridded format can be imported into a HEC DSS file used by HEC-HMS as time series gridded dataset or gridsets. The commonly available…
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…
For small drainage areas, the rational method is widely used to calculate peak flows of different drainage design levels to size storm sewer, inlets, culverts, and ditches. The rational method…
HEC-HMS frequency storm is a type of "nested" rainfall distributions, which can be built by using NOAA Atlas 14 precipitation depth data. If you want to reduce point precipitation depths…
Similar to SCS Type I, IA, II, and III or other NRCS "nested" rainfall distributions, HEC-HMS frequency storm method provides a way to construct your own "nested" rainfall distributions using…
It is often required to evaluate the performance of a storm sewer system using multiple design storm events. Instead of running the same XPSWMM models using different single design storms…
NOAA Atlas 14 provides the latest official U.S. precipitation frequency (PF) estimates for selected durations and frequencies. For its introduction and basic application including point precipitation depth and temporal distribution,…
NOAA Atlas 14 provides the latest official U.S. precipitation frequency (PF) estimates for various durations and frequencies with lower and upper bounds of the 90% confidence interval. PF estimates including…