Tutorial M10 003 Check Files QGIS

Introduction

QGIS is used to import the check files and review the 1D piping, 1D dam failure and 1D to 2D connections between the 1D features and the 2D domain.

Method

This tutorial introduces:

• _grd_check_R.shp
• _nwk_C_check_L.shp
• _1d_to_2d_check_R.shp

Review the check files:

1. Open the following files from the Module_10\TUFLOW\check folder:

   • M10_5m_003_grd_check_R.shp
   • M10_5m_003_nwk_C_check_L.shp
   • M10_5m_003_1d_to_2d_check_R.shp

2. Use the 'Apply TUFLOW Styles to Open Layers'.
3. The grd_check is the 2D grid defined by the 2d_code layer and contains a region object for each cell. It is useful to understand how the model is orientated, the cell size in relation to the hydraulic features and where certain calculations occur in the model. In this tutorial, the grid is orientated to align with the downstream road.
4. The nwk_C_check file shows all attributes applied to the network elements.
   
   File:Animation M10 003 Check 01d.gif
   
   
5. The 1d_to_2d_check file shows the cells selected by the SX boundary links. It is recommended the same number of linking cells is selected at both the upstream and downstream of the dam break and that the number of selected cells is proportional to the structure size. Zoom to each structure to inspect the SX links:

   • The line SX selects cells which are intercepted by the line using the crosshair approach. For example, the dashed lines below are the crosshairs within a cell. A line must intersect at least one of these crosshairs to be selected:
     

   
   

   
   File:Animation M10 003 Check 02a.gif
   

Conclusion

• The nwk_C_check file investigated the attributes for the 1D piping failure and 1D dam failure.
• The 1d_to_2d_check and grd_check files were used to assess the SX connections between the 1D elements and the 2D domain.

Up
Back to Module 10 Main Page