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Flood Warning and Damages in Alice Springs: Part 1 Executive Summary. Part 2 Tangible Damages Part 3 Intangible Damages & Emergency Procedures



Flood Warning and Damages in Alice Springs: Part 1 Executive Summary. Part 2 Tangible Damages Part 3 Intangible Damages & Emergency Procedures


Handmer, John; Smith, D. I.; Greenaway, Mark


E-Publications; E-Books; PublicationNT; Report ; 53/1989




Made available via the Publications (Legal Deposit) Act 2004 (NT).





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Power and Water Authority

Place of publication

Alice Springs


Report ; 53/1989

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Technical Report WRA89053 Viewed at 03:02:00 on 18/02/2010 Page 5 of 139. - ~-------- - ".-:-.;----=-','~ ) Approach :n~o~~ation for ~~e study came fro~ docc~e~~ary so~rces and fro~ i~terv~ews. The material was collec~ed du~i~q two 7!Sl~S to Al!ce Sp~ings, May 30 - ~~ne 7 and Aug~sE :1-18. Documentary sources included reports on t~e ~:ocdf ~ater~al on ~ile in a number of orga~isations a~d ne"spapers. Inter7ieHs Here adl1.inis~e~ed in four distinct 9~O~9S: 3 questionnai~e survey of a sample of flooded households (28), flooded buslnesses (25), a~d flooded government Qrganlsatio!1s (8); intervieHs Hith officials and organisations involved in che flood fo~ecasting, warning a~d ercergency response system (7) i interviews ,tli:.h mer..bers of t~e broadcast med:"a (4) i and inte::.-views rtli~:'"'. members 0: tr.e ~~origi~al co~~un:"~Yf and with organisations deal:~g w:c~ ,. .. 1 ..... J)orlglna conce:::T~S. Da~ages were assessed for ~~e residen~ial sector usi~g the ANUFLOOD procedcre, wh:"le es:.:"~ates for o:her secco::.-s came directly from interviews. Flooding in Alice Springs Alice S9~ings is a ~a9!dly g~oHing cicy of some 24,000 people, 10 per cent of wr:.or:1 a:::-e P,..borigines. It is :"ccated in central Austral:a, where it ~s the only sizeable settleme~t. 3y a~y standa~ds i~ is a remo:.e place being 3bout If500k~s fro~ any major urban area. It is t~e ~dminist=ative, se=vice and tourist cen==e fo= a vast area. The city st~addles the Todd Rive~, Hhich rises on rocky degraded country some 5 hours =iver travel time nO~t~ ~f Alice and vanishes in the desert sands southeast of t~e city. A relatively minor ~ribu~a~y, the Charles River, joins the Todd in the no~~he~n pa~~ of the city. ~he river beds are sandy, lightly timbered and dry, exce9t du~ing floods, and a~e used as campiI'.g a~eas by Jlj)origines. E'our creeks (drains) feed ir'l~o :.he river as it ?2.sses th=oug:-. the built-up area. Over one t~ird of the built ~D area includina the - " central business district (CBD) wo~:d be inundaced by a~ ~xtreme flood exceeding the mag~it~de of the 1:100 even~. A 1:20 Todd Rive= event would f:ood o~ly a few p=opercies to i)ve:--floo= level. ~-Io',.;ever, it is irr:portant <:0 noce t:--.at. significant areas are also flooded by crba~ drainage surcha~ae. E'lood wate~ in the ~ive~ channel is fast flo~ing but the-water is fairly sr:.allow in t.he ~rba~ a=ea. 7he flooding is gene~ally ;f short duration, 12 ~o 18 hours wich geaks being reached Hithin abo~t 4 ho~rs of flow cornmencemen~ in Alice Springs. Xul~iple geak floods are I I I I I I I I I I I I I I I I I I I I