Territory Stories

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

Details:

Title

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

Creator

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

Collection

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

Date

1989-04-01

Description

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

Notes

Date:1989-04

Language

English

Publisher name

Power and Water Authority

Place of publication

Alice Springs

Series

Report ; 53/1989

File type

application/pdf.

Copyright owner

Check within Publication or with content Publisher.

Parent handle

https://hdl.handle.net/10070/228902

Citation address

https://hdl.handle.net/10070/673596

Page content

Technical Report WRA89053 Viewed at 03:02:00 on 18/02/2010 Page 33 of 139. I I I I I I I I I I I I I I I I I I I I 3~rcha~ge abut onto those ~hat experienced true river :~:oodi:;q. Again it .15 very difficult to separ-ate the 7:' .. :;J ::,t"ms :;f damage 1 this p::-ob lem \-:as part ly responsible f:) -:7 ~ :::e ;~oble~s in fitting precise limi~s to the 3rea flooded. _~direst losses to a number of government agencies, the :~sts i:lclude those that ~esulted for both river floodi~g ~~d ur~an drainage surcharge. ~he victims of flood damage have, underscandably, ~~tt~e interest in the finer points of such definitions. ~~weve=, for floodplain management they are significant. :Cc:r example, in using the information from the 19-88 flo::js :0 pla~ for future river floods it is important to =~stinguish che differences. Subsequent river floods may, :~ may not, be accompanied by torrential rain and stro~g ~inds. Further, possible mitiqation measures for river ~loodi~g will do little to alleviate urban storm draina=e _-;J::cha~,?e and vice versa. ,\~umbers of properties inundated :he ANTJFLOOD analysis indicates that for the Easter flocd, 225 residential premises had water overground at some pcint :~ the~r g~ounds, a further 62 had g~ollnd heigh~s that :~rres~onded to maximum flood height. Of the 225, wate~ is estimat.ed to have reached overfloor levels for 203, '.,.;,i(::-:' a --.,-~,,-- 25 '-'~h flood -ne'g-t--~ ~vact 1-' ma~-n' ;ng floor ho' -"'t ~~_~,,-'~Ljt:=_ - ~"'J..L .__ ~,:,. It... -...... 'f. <- ........... .L __ ~ ...... ..L-::.,_. :or the commercial sector the ANUFLOOD analysis ~~dicates chat 28 properties had water in the grounds of t~e ;:,;:-operty, plus a further 5 'Wit.h flood level matching gri=~nd ~evel. Of this nUfi1..ber, water is estimated to have atta.~:1ec!. ~verfl~or levels in 12 cases with a further 9 having a match hetween floor height and flood 1evel_ Note that for :-;omme=::ial damage the interview- data was used to defi.:1e -:h.~se chat suffered damage but the similarity in the n~IT'.be!:' -"" properties affected is good. Figure 2.4 and 2.5 present information on the numbers c)[ residential and commercial properties that ,."ould e:-:perience overground or overfloor flooding in height ~ncrements of O.25m. These illustrations can also be used -::0 obtain information on the estimates of the numbers of ;roperties that were flooded to differing depths_ For example Figure 2.4, for residential overfloor flooding, indicates that 66 properties had between zero and O.25m or 1.'3.ter over floor level, the r~G:n.ber with greater than 1 ~etre :verfl~or was 28. :lgures 2.4 and 2_5 also illustrate a most import2:1t ~eature of the Alice Springs flood, namely that small ~~crements in height result in the inundation of very :~creased numbers of properties. For example, Figure 2.4 shows that an increment of flood height of just O.25m would ~esult in a further 110 residential properties experiencing :verfloor flooding. This sensit~vity is unusual and creates ;:oroblems in providing precise estimates of numbers of proper~ies affected by flooding. The degree of accuracy


Aboriginal and Torres Strait Islander people are advised that this website may contain the names, voices and images of people who have died, as well as other culturally sensitive content. Please be aware that some collection items may use outdated phrases or words which reflect the attitude of the creator at the time, and are now considered offensive.

We use temporary cookies on this site to provide functionality.
By continuing to use this site without changing your settings, you consent to our use of cookies.