Flood Modeller Tutorial Module01: Difference between revisions
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In this module we will link an existing 2D TUFLOW domain to an existing Flood Modeller 1D model. The 2D TUFLOW domain will represent the floodplain in the study area, and the 1D Flood Modeller model will represent the watercourse and all online structures. <br>
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 one-directional. A 2D scheme is suited to the representation of floodplains where
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As [[Tutorial_Module01#Reviewing_Model_Performance | discussed in Module 1 of the TUFLOW Tutorial Model]], the main
[[file:Poor_2d_rep.png|400px]]<br>
Using a cell size that is coarse relative to the width of the
* 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 [[Tutorial_Module01#Advanced_.28Optional.29 | optional section of
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TUFLOW may be dynamically linked to 1D networks using the hydrodynamic solutions of ESTRY (TUFLOW 1D), Flood Modeller (previously ISIS), 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. However, the reduction in simulation time can be beneficial and make this a good approach. For this module, the complete Flood Modeller 1D model has been provided,
=Existing Model Data=
This tutorial builds upon the 2D TUFLOW domain that was constructed as part of [[Tutorial Module01|Module 1]] and [[Tutorial Module02|Module 2]] of the TUFLOW Tutorial
The model developed in these tutorial modules already contains some culverts modelled as 1D elements. The culverts are modelled in ESTRY, TUFLOW's internal 1D engine. One of these culverts will be kept in ESTRY and the other will be
The 2D boundary conditions (upstream inflows and downstream stage-discharge boundary) will be removed from the model. These will instead be represented in Flood Modeller as it is a more typical schematisation for a 1D/2D linked model.<br>
The existing TUFLOW model consists of:
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*1D/2D boundary links to connect the 1D ESTRY culverts to the 2D TUFLOW domain.
==Flood Modeller==
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For this tutorial, the floodplain of the study area will be modelled entirely in TUFLOW.
The cross-sections in the Flood Modeller 1D model have been trimmed to the top of bank to ensure there is no double-counting of storage within the floodplain.
Upstream and downstream boundary data is contained separately within the IED files. These will be referenced and linked to the Flood Modeller 1D model via the IEF
=GIS and Model Inputs=
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The DAT and IED files are complete and will not require any modification to link to TUFLOW.<br>
However, we will alter the IEF to create the link. The IEF alterations can be done either in a text editor of your choice or using the Flood Modeller Interface.<br>
The instructions below have been written for the Flood Modeller Interface
==IEF File==
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*Use Initial Conditions from: Network File (.dat)
*Results File: the full path to \FMT_Tutorial\FMT_M01\Flood_Modeller\RES\FMT_M01_001
<li>To the right of the Event Data box, click Add and select the '''
[[file:FMT Simulation files.JPG|500px]]
<li>On the 'Times' tab, we will replace the simulation time parameters that were removed from TUFLOW. Enter the following parameters:</li>
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