FM Tute M01 QGIS 1D2D Banks

Introduction

In this section we will define the bank elevations of the watercourse. These are the elevations of the 1D/2D boundary cells that link the 1D Flood Modeller watercourse to the 2D TUFLOW floodplain. Note that it is these cell elevations that determine whether out of bank flooding occurs and not the left/right bank elevations with the Flood Modeller 1D cross-sections.

Method

1. Import in an empty 2d_bc_empty_p.shp layer from within the TUFLOW\model\gis\empty folder and save as 2d_bc_hxi_FMT_001_P.shp.
2. Open the 1D_2D_Points.shp GIS layer from Module_Data\Module_01\gis folder. Select all objects from within this layer, copy and paste into 2d_bc_hxi_FMT_001_p.gis.
3. Interrogate one of the digitised points and inspect the attributes. The ‘type’ attribute is ‘ZP’ to denote that it is a z-point. The ‘f’ attribute is the elevation of the bank link in mAOD.
4. Save the file in preparation for reading in TUFLOW.
Please return to the Flood Modeller Tutorial Model module 1 page here.