FMA Challenge 1 (1D-2D linked)

Introduction

If you haven't already completed the tutorial models, please see this tutorial model page. This page is for TUFLOW users of intermediate to advanced ability.

In this challenge, a fully two-dimensional model with a nested one dimensional model will be developed to explore an Urban Riverine conditions with an urbanized over-bank floodplain. The model includes several hydraulic structures/bridges within the main stream system which will impact flood elevations. Flooding within the urbanized over-bank floodplain is expected.

From this challenge, it is expected the user will develop their skills in:

• Nested 1D/2D models;
• Understanding Urban Riverine conditions and over-bank floodplains,
• Understanding of the influence of hydraulic structures;
• Using scenarios and variables to determine a suitable cell size, timestep and log output scenarios; and
• Using bc layers with HX, XP, CD and CN types altogether.
  
  

Data for this model is provided via ZIP compressed file posted on the internet/FTP for download.

Relevant Tutorials

Although all tutorials are directly relevant to the challenges, it may be useful to revisit some of the finer details as follows:

• 1D-2D Linking- Tutorial Module 2
• Running Events and Scenarios- http://www.tuflow.com/forum/index.php?showtopic=1149&hl=scenario

Data Notes

The original data for this analysis has been modified from its original datum and original elevations have been altered and corrupted such that the data would not be usable for real world modeling, analysis and mapping. Datum data has been stripped from the files provided. A combination of statute (ft) and metric (m) data is provided in the challenge data. Analysis may be performed in metric or Statute units, however all returned data shall be delivered to FMA in Statute (ft) units. Additionally, some of the provided data indicates vertical Datums 29 and 88. We have verified all data provided is in the same vertical datum and for this model challenge assume that is the vertical datum “FMA 12”.

Information to Modelers

Assignment of all parameters for this analysis are at the discretion of the modeler. A high resolution aerial image is provided so that land cover details can be inspected. Information on the problem definition can be found on FMA/FMA_Scenario1/FMA_Challenge_Model_Introductions.

Relevant Files

It is up to the modeler's discretion to determine what GIS package to use, what text editor to use, and how to run their models (batch mode or intra-text editor).