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This was causing unsteady flow computations to go unstable with no message as to what the problem was. If a user tried to start a lateral structure with exactly the same coordinates as a facepoint, sometimes a round off of the numbers cause the interface to think it needed an additional facepoint in front of or at the end of the lateral structure connection to the 2D area. There was a problem where the GUI was sending an extra 2D face point at either the beginning or end of a lateral structure connection. Lateral Structure Connection to 2D Area Issue.The program now checks for this and does not allow a user to have a centerline and station/elevation data that are not the same length. If the station/elevation data has a length that is longer than this line, then the computational engine has a length of the structure that is not connected to any actual cell, and this causes the program to make incorrect flow calculations if that part of the structure is wet. The program connects to the 2D cells only based on the geospatial centerline and its length. connecting a storage area to a 2D area, or a 2D area to another 2D area) when the length of the station/elevation data did not match the length of the structure centerline for cases when a geo-referenced centerline was used for the structure. The issue would happen for external SA/2D Hydraulic Connections (i.e. External SA/2D Hydraulic Structures Issue.This was a problem as you continue to edit/modify your mesh, as those breaklines may not function as you intended them to. RAS Mapper not Saving all Breakline Options Issue: The program was not saving all options when the user activates the option to “Enforce a 1 Cell Protection Radius” for some data sets.This problem did not occur for stationing data that starts at zero.
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Floodway Inundation Boundary Mapping Issue: Inundation Boundary polygons created by RAS Mapper for floodway analysis were not properly created if cross-section station-elevation data started with non-zero stationing.If you used a work around for this problem in the previous versions, remember to change the model back to the normal way of using uniform lateral inflows with no flow modifiers. This mistake has been fixed for HEC-RAS version 5.0.7.
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This mistake was introduced in version 5.0.4 and has been in the program since this version. Therefore that portion of the flow was not being put into the river. However, no flow was being put in between the cross sections upstream and downstream of a bridge/culvert or an inline structure. The flow is then put in between the cross sections based on the flow per foot computed, times the length between the cross sections. The bug was caused due to HEC-RAS not using the length across the bridge/culvert or inline structure to compute the total lateral structure length, which is then used in computing the flow per foot along the lateral structure. 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.
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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: