![]() ![]() When using a uniform lateral inflow along a 1D river reach, HEC-RAS was not correctly putting all of the flow into the river from the uniform lateral inflow hydrograph when the lateral inflow extended across a bridge/culvert or an inline structure. Users can draw these polygons in any direction. ![]() This problem has been fixed in version 5.0.7. Because the polygon had a negative area, the polygon was actually not being used to override any of the Manning’s n values. Unfortunately, in previous versions of HEC-RAS Geometry editor (5.0.6 and earlier), if you draw a Manning’s n Region polygon in the counter clockwise direction, a negative area was computed for the polygon (the shapefile standard is to store it in the clockwise direction). If you used the Manning’s n Region option in the RAS Geometry editor (Not RAS Mapper), there may be an issue with your final Manning’s n values not being correct within that Region. The following is a list of bugs that were found in HEC-RAS Version 5.0.6 and fixed for Version 5.0.7:
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