Brisbane urban development and flooding

u r ba n d e v e lo p m e n t a n d flooding in brisbane CBD representaion III 2021 renfei XU

A1738937

Tutor:DR. Carlos Bartesaghi Koc

image 1:Brisbane ferry terminal in flood

Global

National

image 2:brisbane river flood peak in CBD

Regional

Brisbane CBD

image 3:birdview of floods

Brisbane sits on a flood plain, which means flooding is possible.

This booklet works to analyze the risks of flooding to ensure Brisbane CBD remains safe and liveable.

Goal 1.Look into the change of the area from 2009 to 2014.In terms of the area development, urbanization 2.Analyze the flood area in Brisbane CBD

model link:https://sketchfab.com/3d-models/brisbane-2009-9a1a575093644ed7831c4fcaf915dc42 booklet link:https://issuu.com/dexterxu/docs/urbandesign

Flood and flow

Buildings

Roads

Contour

Terrain

high way rail transportation walk path road

Brisbane CBD 2014

Brisbane temperature

In the charts, we can see that Brisbane is very hot and wet from Oct to Mar. Meanwhile, the wind direction is from south to north.

Point Cloud model skyscrapers

small buildings and tall trees

trees and shrubs road ground

urban changes between 2009 and 2014

1.2009 brisbane CBD model

2.2014 Brisbane CBD model

3.detect the urban change

4.highlight the new buildings

office area education area commerical area hotel and dining government and public

1 2

3 4

5

6

7 8

urban changes between 2009 and 2014

1.Queen Elizabeth II Courts of Law 2.400 George St 3.180 Brisbane 4.145 Ann St 5.111 Eagle St 6.Adina Hotel 7.123 Albert St 8.42 Albert St

flows and floods 1.import 2009 Brisbane CBD LAZ model into https://plas.io/

2.create a flat surface to animate floods

3.import image into qgis to generate tif

4.create the annual flood zone in cloud compare

Annual flood zone We can get the conclusion that low-lying areas in the central area are the annual flood zone area

low liklihood flood zone (0.2% chance)

Medium liklihood flood zone (1% chance)

Medium liklihood flood zone (5% chance)

A series of floods hit Queensland, Australia, beginning in November 2010. The floods forced the evacuation of thousands of people from towns and cities. At least 90 towns and over 200,000 people were affected.

flood animation

flood affected area

Through flood animation , we could see that the south-east part is low-lying area of the Brisbane CBD.

Slice and sections

s1

s2

s3 s5 s4

s1 s4

s2 s3

view from east

s5 Through the slice and section,we could see that the topography of Brisbane is low in the middle, higher in the southwest and northwest. So that's why floods are so common.

When there is too much rainfall, the central low-lying terrain holds so much water that it cannot quickly be discharged

flows and floods

1.Create a terrain in grasshopper and use BISON to generate the flows

2.compare flows with terrain

4.create lidar file in cloud compare

3.export files to Cloud compare

PROCESS Spacial Data from LIDAR 2009 Brisbane CBD LIDAR DATA

a change detection analysis in Cloud compare(using loud-to-Cloud distance techniques )

2014 Brisbane CBD LIDAR DATA

DEM model in Qgis

New buildings built between 2009 and 2014

Mesh model in Rhino by Bison

Flow analysis with Bison

Brisbane Anual flood zone , water flow

reference image1:http://floodinformation.brisbane.qld.gov.au/fio/ image2:arcgis.com/home/webmap/viewer.html?featurecollection=http%3A%2F%2Fservices.ga.gov.au %2Fgis%2Frest%2Fservices%2FAustralian_Geological_Provinces%2FMapServer%3Ff%3Djson%26o ption%3Dfootprints&supportsProjection=true&supportsJSONP=true image3:https://www.abc.net.au/news/2011-01-13/then-and-now-the-1974-and-2011floods/1905460?nw=0