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= Introduction =
In thisFMA challengeChallenge 1, a fully two-dimensional model with a nested one dimensional model has been developed to explore in and over-bank floodplain conditions. The model includes several hydraulic structures/bridges within the main stream system which impact flood elevations. Flooding of the urbanised over-bank floodplain is experinced. For interest, the requirements of the FMA challenge are provided [httphttps://www.tuflow.com/Download/TUFLOW/Demo_Models/2012_FMA_Challenge/All/FMA%20Challenge%201%20Documention.TUFLOW.pdf here]<br><br>▼
The FMA Challenge Wiki's provide example TUFLOW models submitted by BMT WBM for the Floodplain Management Association 2-Dimensional Model Challenges, 2012.
This Wiki assumes an intermediate to advanced user level so if you're just starting out or haven't already completed the tutorial models, please see this <u>[[Tutorial_Model | tutorial model]]</u> page. <br>
 
A fullyThe functional exampleFMA modelChallenge 1 (1D-2D linked) has been developed allowing you to review the model setup, run the model and review results developingimproving your skills in:▼
▲In this challenge, a fully two-dimensional model with a nested one dimensional model has been developed to explore in and over-bank floodplain conditions. The model includes several hydraulic structures/bridges within the main stream system which impact flood elevations. Flooding of the urbanised over-bank floodplain is experinced. For interest, the requirements of the FMA challenge are provided [http://www.tuflow.com/Download/TUFLOW/Demo_Models/2012_FMA_Challenge/All/FMA%20Challenge%201%20Documention.TUFLOW.pdf here]<br>
 
▲A fully functional example model has been developed allowing you to review the model setup, run the model and review results developing your skills in:
*Nested 1D/2D models;
*Understanding urban riverine conditions and over-bank floodplains;
*Using the powerful functionality of scenarios and variables to determine a suitable cell size, timestep and log output scenarios;
*Understanding the impact of data quality on DEM development;
*Understanding the influence of structures on open channel hydraulics;
*Using scenariosbc andlayers variableswith toHX, determine a suitable cell sizeXP, timestepCD and log outputCN scenariostypes; and
*UsingUnderstanding bcthe layersimpact withof HX,data XP,quality CDon andDEM CN typesdevelopment.<br><br>
 
Data for this model is provided viain ZIPa compressedvariety fileof availabledifferent [http://wwwGIS compatible formats.tuflow.com/Tuflow%20Tutorial%20Models.aspxinternet Download onthe dataset that matches the TUFLOWGIS Downloadssoftware Page].you are using:
*[https://www.tuflow.com/Download/TUFLOW/Demo_Models/FMA_Challenge_Model_1_QGIS.zip QGIS Data Download]
*[https://www.tuflow.com/Download/TUFLOW/Demo_Models/FMA_Challenge_Model_1_MapInfo.zip MapInfo Data Download]
*[https://www.tuflow.com/Download/TUFLOW/Demo_Models/FMA_Challenge_Model_1_ArcGIS.zip ArcGIS Data Download]
 
=Relevant Tutorials=
Although all Tutorials are of relevance for the FMA Challanges, For FMA Challange 1, it may be useful to revisit the following:<br>
*<font color="blue"><tt>1D-2D Linking - </ttu></font>- [[Tutorial Module02Tutorial_M03|Tutorial Module 23]] </u>
*Running Scenarios - <u>[[Tutorial_M08|Tutorial Module 8]]</u>
*<font color="blue"><tt>Running Events and Scenarios</tt></font>- http://www.tuflow.com/forum/index.php?showtopic=1149&hl=scenario<br>
*Running Events - <u>[[Tutorial_M09|Tutorial Module 09]]</u>
 
=Model Setup=
This section provides an overview and discussion of the model domain setup.<br> It is at your discretion which GIS package, text editor and method of model simulation to use (batch mode or within the text editor).
All files required to setup and run the models are available within the download package. You have the choice of running with shape file or mif for usage in ArcGIS/QGIS andor Mapinfo users respectively.
 
==Computational Domain Assembly==
TUFLOW directly reads GIS data layers to construct models. The layers used/created for Challenge 1 are:
<ol>
<li>A DEM TIN created from the provided terrain data (2ft contours) and exported to ESRI ASCII format as a 2ft DEM grid. When TUFLOW reads this DEM it interpolates the elevations onto the 2D computation grid.</li>
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