hydraulic modelling of 3d structures

Modelling 3D Structures

Rachael Albrighton Richard Allitt Associates Ltd

Modelling 3D Structures 11th November 2016

Introduction

• Modelling 3D structures in 2D such as ponds and embankments is a relatively new advancement within the industry.

• They can be represented using features within InfoWorks ICM or by adding the structures directly into the DTM.

• During detailed design, there is a need to assess the modelling approach used due to the various design stipulations that commonly need to be met.

• This presentation will examine how this issue was overcome during a flood alleviation scheme in Filey


Background

• 18th July 2007, 82mm of rain fell in 90 minutes

• Significant overland flow from the surrounding arable fields


18th July 2007

• Flooded 200 properties, a school & severe erosion to the ravines


Following Flooding


Model Development Timeline

Using tools within

modelling software


Using tools within Modelling Software


Process Issues

• Publically funded industry

• Many stakeholders are non-technical - scheme visualisation is important

• Current modelling practices bespoke and only easily understood by people with modelling experience


Using tools within modelling software

Building 3D Structures into the DTM using Global Mapper



Building 3D Structures into the DTM using Global Mapper

1


Extent and Crest of Embankment

2


Extruded Embankment

3


Extent of Base of Storage Area

4


Final Storage Area

5



Using tools within modelling

software

Building 3D Structures

into the DTM using Global

Mapper

Building 3D Structures into the DTM using 3D AutoCAD

drawing


Using 3D AutoCAD Drawing

1


Contours Combined with DTM XYZ Points

2


Storage Area Clipped

3


Merged into Existing DTM

4


Conclusion

• Whilst current practices are appropriate at the initial design stage, it is not accurate enough in the detailed design stage

• Having a scheme that is incorporated within the DTM is easier to visualise for stakeholders and public and can be used for other purposes

• Current drive of using BIM, working in partnership and visual nature of modelling, seems logical that the next step is to directly add schemes into the DTM.

Thank you

hydraulic modelling of 3d structures

Engineering