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…
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…
XPSWMM can load an image raster file as background to facilitate the drainage network creation. The image file needs to have a world file associated with so that XPSWMM is…
To perform 2D modeling using XPSWMM, a surface dtm file (*.xptin) needs to be generate first in XPSWMM. Another option to create a 2D surface is Reference a Grid File…
A big size raster file usually can be compressed to reduce its size. A lot of QGIS raster tools/commands have a built-in option to select a method to compress a…
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.…
A skewed bridge will reduce its hydraulic opening width (area) and mostly likely its hydraulic performance and thus in HEC-RAS a skewed bridge must be modeled properly by accounting for…