Flood Modeller Tutorial Module01 Provisional: Difference between revisions
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=Introduction=
In this module we will link an existing 2D TUFLOW domain to an existing Flood Modeller 1D model. The TUFLOW 2D domain will represent the floodplain in the study area, and the 1D Flood Modeller model will represent the watercourse and all online, in-channel structures.
1D-2D linked models are able to utilise the individual benefits of 1D and 2D solution schemes. In this example, the 1D Flood Modeller scheme is used to represent the watercourses where the flow is essentially uni-directional. A 2D scheme is suited to the representation of floodplains where more complex flow patterns may occur.
▲1D-2D linked models are able to utilise the individual benefits of 1D and 2D solution schemes. In this example, the 1D Flood Modeller scheme is used to represent the watercourses where the flow is essentially uni-directional. A 2D scheme is suited to the representation of floodplains where more complex flow patterns may occur. <br>
The main watercourse channel within the existing 2D model is not very well represented using the 5m 2D cell size. In parts, the watercourse is only 5-10m wide and the 5m cell size could be considered too coarse to accurately represent the watercourse topography.<br>
[[file:Poor_2d_rep.png|400px]]<br>
Using a cell size that is coarse relative to the width of the watercourse channel may reduce the accuracy of the conveyance in the channel. There are a number of options for improving the representation of the creek channel:
* decrease the width of the 2D cells, either globally or using Quadtree ; and/or use sub-grid sampling, and or,
* model the channel as a 1D network, dynamically linked to the 2D domain (the floodplain).
In this module we will adopt the final approach of modelling the creek as 1D elements using Flood Modeller.
TUFLOW may be dynamically linked to a number of 1D networks using the hydrodynamic solutions of ESTRY (TUFLOW 1D), Flood Modeller, XP-SWMM and 12D Solutions’ Dynamic Drainage.<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 model to setup. For this module, the complete Flood Modeller 1D model has been provided, to allow for progressing through the module in a relatively short period of time.<br>▼
▲TUFLOW may be dynamically linked to a number of 1D networks using the hydrodynamic solutions of ESTRY (TUFLOW 1D), Flood Modeller, XP-SWMM and 12D Solutions’ Dynamic Drainage.
▲Setting up a 1D/2D model where the 1D channel cuts through the 2D domain is probably the most time-consuming type of a model to setup. For this module, the complete Flood Modeller 1D model has been provided, to allow for progressing through the module in a relatively short period of time.
=Existing Model Data=
This tutorial builds upon the 2D TUFLOW domain that was constructed as part of [[Tutorial_M01 |Module 1]] and [[Tutorial_M02 |Module 2]] of the TUFLOW Tutorial Model.<br>
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