RAS Mapper of HEC-RAS 6 has a set of terrain modification tools to modify original terrain. This post is the second of the 3 post series for terrain modification using…
RAS Mapper of HEC-RAS 6 has a set of terrain modification tools to modify original terrain. This post is the second of the 3 post series for terrain modification using…
RAS Mapper of HEC-RAS 6 has a set of terrain modification tools to modify original terrain. Basically the terrain modification tools creates vectors (lines/simple shapes/polygons) with elevations assigned to them…
RAS Mapper of HEC-RAS Version 6 has some basic but useful GIS functions to complete some GIS operations and spatial analyses common to HEC-RAS modeling, although it could not replace…
A bridge can be modeled in 2D domains using a geometry editor similar to 1D bridge geometry editor since HEC-RAS 6.0. HEC-RAS manual defines this method as Simplified 1D/2D Bridge…
In HEC-RAS 2D modeling, manning's n values (Roughness Coefficient) for 2D flow area are normally associated with land cover types and used to account for energy friction losses of overland…
HEC-HMS has the capability to estimate hydrology parameters for watersheds delineated. This post is to demonstrate these functions. The Bear Creek Watershed was delineated in Post 1 of 3 and…
After a watershed has been delineated using HEC-HMS GIS tools, the subbasins and reaches can be further refined using HEC-HMS merge and split functions. Five subbasins and two reaches were…
The new HEC-HMS published around 2020 has some useful GIS tools to delineate a watershed using terrain data. Unlike HEC-GeoHMS, these standalone GIS commands are an integral part of HEC-HMS…
The USGS National Hydrography Dataset (NHD) represents the water drainage network of the United States with features such as rivers, streams, canals, lakes, ponds, coastline, dams, and stream gages. The…
USGS DEM (Digital elevation models) are arrays of regularly spaced elevation values referenced horizontally either to a Universal Transverse Mercator (UTM for 1-meter DEM) projection or to a geographic coordinate…