Ipswich Floody Ipswich

IPSWICH FLOODY IPSWICH Bremer River, QLD

Josh Zilm a1759193

INTRODUCTION

The task was to create and design a digital Point Cloud model. By collecting, manipulating, and visualising point cloud data, we can understand the spatio-temporal dynamics and functional aspects of a of a site. This booklet describes and illustrates the processes used to achieve this goal.

SketchFab Model ; https://skfb.ly/on6DR

OBJECTIVES

Point cloud data is obtained from a range of sources. This data is then analysed through the use of programs such as Cloud Compare and QGIS. Multiple types of geographical data can be combined during this process to represent varying aspects of any given site.

SITE

Bremer River, Ipswich, QLD The lower Bremer River is the most complex part of the Bremer Catchment in relation to water flow, varied terrain and landscape, and tidal influences. It runs through the town of Ipswich (30 mins from Brisbane) and is know to be succeptible to flood events.

Two noticable years of particular devastation are 1974, and 2011.

The events of 1974 saw 6,700 homes flooded, with an estimated $200 Million damage throughout the state of Queensland.

In 2011 roughly 300 properties were inundated, with the waterline staying above Major Flood Level for four days.

Although almost 40 years seperates the two floods, the one thing that remains the same is the sociological impact on the community.

PROCESS Developing the model had many challenges. Sourcing appropriate and usable data was the first hurdle, and due to indecisivness the site was changed multiple times before settling on Ipswich, and tutorial videos were on heavy rotation while trying to get a better understanding of the programs.

Below is the workflow used in the models creation.

Spacial Data (LiDAR)

Micro Tutorials (GIS + Point Cloud modelling)

Sketchfab

QGIS

Cloud Compare

Export .las/ .asc

Define Coordinate Reference Systems

Filter Points By Value

Render To File

Export Map (.shp) to .tif

Clone/Merge/ Transform

InDesign

LAStools (LAScolour)

Edit RGB Colours/ Scalar fields

Photoshop

Project colour onto Cloud Compare File

Subsample

Issuu

Open Data Directories

3

2

1

2011 Flood Level

1974 Flood Level

Affected Buildings

ANALYSIS

The completed model shows the water levels reached during both the 1974, and 2011 floods, as well as the buildings in the town of Ipswich that are directly affected.

Representational methods and models like this could be valuable tools in future research and planning for disaster mitigation and prevention

DEEST_3515 Representation III Josh Zilm a1759193 2021