EricXu 0 Report post Posted August 19, 2011 Hi All, We have a Tuflow model using 1D irregular Culvert whose behaviour is not good. We have tried both XZ and HW table to define the culvert cross section shape. Also tried different time step. But could not get a good model performance. When we tried to use Zig-zag SX line to connect more cells to the 1d culvert, we only got a good model performance for very low flow. We have to use 2d_lfcsh layer to model the irregular Culvert which is suggested by Phillip Ryan. This worked well. Sometimes, we may have to use 1D irregular Culvert with good cross section definition. Does anyone else have same problem with 1D irregular Culvert? Any one solved the problem? Thanks in advance. Regards, Eric Quote Share this post Link to post Share on other sites