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Line 1: <ol> =Introduction= As discussed in Module 1 (<u>[[Tutorial_Module01_Archive#Reviewing_Model_Performance \| (discussion here)]]</u>), the main creek channel is not very well represented using the 5m 2D cell size. In parts, the creek is only 5-10m wide and the 5m cell size could be considered too coarse to accurately represent the creek topography. Refer to the below figure.<br> [[file:Poor_2d_rep.png\|400px]]<br> Using a cell size that is coarse relative to the width of the creek channel may reduce the accuracy of the computed conveyance in the channel and introduce a source of mass error to the model. There are two options for improving the representation of the creek channel:<br> * decrease the width of the 2D cells; and/or * model the channel as a 1D network, dynamically linked to the 2D domain (the floodplain). In the optional section of module 1 (<u>[[Tutorial_Module01_Archive#Advanced_-_Model_Resolution_.28Optional.29 \| located here]]</u>), we looked at reducing the cell size to get a better representation of the channel. In this module we will adopt the second approach of modelling the creek as 1D elements.<br> Setting up a 1D/2D model where the 1D channel cuts through the 2D domain is probably the most time-consuming type of a TUFLOW model to setup. However, the reduction in simulation time can be beneficial and make this a good approach. For this module, most of the time consuming data entry tasks have been undertaken, so you can progress through the module in a relatively short period of time. However, throughout the tutorial we will provide guidance on making this process as efficient as possible should you have to start from scratch.<br>

Tutorial Module04 Archive: Difference between revisions