Error: (HD_ERR_WLAboveMaxOnXS)

Hallo, I tried running simulation MIKE+ but it always gives an error. First it says that: water level exceeded maximum on grid point(s). Larges exceed more than 1,0000 times than cross section height. And the error file says: 'HD_ERR_WLAboveMaxOnXS'. And when I decrease the height, it still says the same thing. what mistake did I do? Anyone have any suggestions? regards hastin

Hi, This abnormal water depth detection is based on a ratio between the computed water depth and the cross sections' depth. If you have reduced the cross section's height, then this ratio becomes larger and then it's even more likely to get this error. In some special cases with shallow cross sections and under drowned conditions, it can be expected that the computed water depth will be significantly higher than the cross section's height. In that case the solution is to allow a larger ratio than 1. This is controlled in the 'MIKE 1D engine configuration' window. Note that your error appears in the first time steps of the simulation, so it can also be due to an instability, being the consequence of a significant discrepancy between initial conditions and boundary conditions (e.g. when applying a large discharge as boundary condition at the first time step, in an initially dry river).

I have the similar errors when running my HD simulation as well. It doesnt make sense for the model to stop running even in the event of flooding of the cross section.  May I know how do I allow a larger ratio than 1 in the MIKE 1D engine configuration window? Is it the HD Global or HD River configuration item through the predefined options? Thanks.

Hi. It's in the HD Global items: it's described in the 'Cross section extrapolation' option.

I have the similar errors when running my HD simulation as well. I need to do the flood inundation studies by coupling it to the 2D domain. It doesn't make sense for the model to stop running even in the event of flooding of the cross section.  May I know how do configure the options in " MIKE 1D engine configuration" window? I tried to modify it in the "Predefined options" but the fonts gets red and it doesn't modify. If I need to modify in the "Custom options" then please let me know what to write in the "Option Name" "m_CustoConfig.Name". It isn't helping. Please help