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…
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…
The standard hydrologic grid (SHG) is a grid system developed by USACE Hydrologic Engineering Center (HEC) to cover the conterminous United States for hydrologic modeling purpose in HEC-HMS. SHG is…
A Horizontal datum is to measure a location on the Earth's surface in latitude and longitude or other coordinate systems. A vertical datum is used to measure the elevation or…
In this post, we explained how to import points in CSV format to QGIS to create a point shapefile, Similarly we can import points in CSV format with easting/northing or…
Points in CSV (comma separate values) format with Northing/Easting or Longitude/Latitude can be imported to QGIS and then be saved as a point shapefile. A point CSV file can also…
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…
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,…