Using QGIS to Automate Flood Depth and Extent Data Webinar

Our latest webinar, Using QGIS to Automate Flood Depth & Extent Data, aims to explore the use of QGIS to establish the processes to automatically generate flood hazard data.
Specifically the webinar covers:
• The use of QGIS Graphical Modeler
• Geoalgorithm model building to generate flood depths and flood extents

[@RickMarshallMaps]

Thanks for the great presentation. It has helped me a lot.

[@MallonTechnologyLtd]

Thanks Rick, we're glad you found it useful.

[@azizrhazi8202]

Very interesend

[@punwathprum8680]

Can you kindly share your data? Then I will be able to practise it along. What is the Z attribute of the point?

[@aomaom9554]

Is there a tutorial on how to do flood modeling using DEM? Just use DEM data.

[@mohama7551]

Professor, since you have 20 years of experience in this field, do you know how to analyze the visible thermal radar with a high wavelength that penetrates the surface of the earth, and process it and display it in a format that shows features under the surface of the earth? Formulas that benefit archaeologists

[@aneeshasatya2083]

If the LiDAR data is not available for the study area , please suggest me other alternative to create the model

[@ianhand4539]

Hello Aneesha, apologies for only getting back to you now. You can use another Digital Elevation Model, as long as it is a continuous raster format such as GeoTIFF. However, resolution, and hence the spatial quality, will be dictated by your digital elevation model input: for example, if you are going to use the USGS SRTM 30m DEM then your output will only have an accuracy for 30m spatial resolution. You could always survey an area in person with Differential GPS and then create a continuous raster from this, although this method would be incredibly time consuming!

[@mingjianwu4277]

Dear sir,can you share GN26 attributes file for me ? thank you

[@mevannk1]

This is great , Can I have the Nodes, Processing input and Attribute input sample files to see the data structure and the fields of them?

[@ianhand4539]

Hello Mevan, thank you for watching the webinar. I can tell you that the structure of the Nodes input consists of three necessary columns: X coordinate, Y coordinate and the Z value which contains the flood levels at given points above sea level. The Z values were created using highly specialised flood modelling software by a team of flood modelling engineers. The Processing Input is a bounding box processing extent that you can draw on the fly via your map canvas in QGIS when setting up the processing extent input for the model, this is outlined in the webinar. The attribute fields are in-house coded flood information identifiers, these would differ from your own flood attributes - the important thing is if you are joining up attributes to make sure you have a common field to join to, in this case an FID column.

[@taaj07]

Hello Ian, thank you for posting such a great video. I still have problem understanding the Attribute input. I understand, my flood attribute will differ, but would like to know what kind of information this attribute table contains. and example or even a "row" from your table would be a great help. thank you