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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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Check within Publication or with content Publisher.

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Technical Report WRA89053 Viewed at 03:02:00 on 18/02/2010 Page 27 of 139. I I I I I I I I I I I I I I I I I I I I . , u a9plicable fer large concerns, e9 chose engaged in manufac~uring or large hocels. T~e original preflood Alice Springs study used the commerc:,al scaqe-damage curves supplied with che ANUFLOCD p"rogram. HO',"iever,. the nurnber of commet'cial p!"operties flooded at Easter 1988 was relatively small but included a !ligh pr:portiJo of large ente~ptises. It was possible ttlerec~e, to i~~erview the majority of those directly effecced and to produce more precise values for the damages than could be obtained from the use of stage-damage curves. A sma:1. number of retail outlets at the Dar-gin of the flooded area .... ere not included in the intervie""r survey. However, potential stage-damage curves remain the only viable approach for the estimacion of damages of the kind that wo~ld be required in subsequent studies for improved floodplain ma~agement at Alice Springs, ie not based on an actual :lood. The revised ANUFLOOD commercial staqe-damage curves recommended for such purposes are given in Appendix " ~ . The Interview Surveys In order to obtain a more detailed picture of a range of flood damage, two surveys were undersaken. rhese ilere all conducted in an iotervie~.;- setting r,l/i-ch the intervie~der -nmp'e~ir,g a ~'Jr"e" form 'n C1"Scu~s~~n 7~ith ~~~ ~nto-'r~ew'oP '-...~, L _~_~ ...... 1 Y;[ .. -'-- .... ..:... OJ ..L.v._ vv_~. _1..l.1.:;; _. ~..L.V ____ ~. The questions covered a range of topics, those linked to the estimation of flood damage are summarised below. The~e were separate forms for householders and the commercial sector". The HQusehold Survey Interview's ftJe:::e conducted with a sample of 24 households loqated ~Nithin the flooaprone area. A summary is given in Taole 2.3. All experienced inundation of at least a portion df the grounds of the property and, in 15 cases, water extended over floor level. The worst effected properties in the survey had overground depths of O.75m and overfloor depths of O.4Sm. The most frequently reported conterlts damage was to carpets, clothes and bedding, and to books and papers. In the sample there was only one instance of reported loss of electrical goods, a video. This is a reflection of the limited overflooc depths and the ease with which such items can be lifted above floor level. Structural damage was dominantly to fitted cupboards, floor and wall tiles, and to decorations in general. lio;ve'ver, there ;vere two reported instances, numbers 19 and 20 in Table 2.3, of "cracks" in walls. Without a professional bUilding survey it is difficult to establish if these indicate serious building damage. In one case the cracks ~ere thought to have resulted from subsidence due t8 flood wdteL'S uode[";ninio(; trle foundations. r>1ajor st:ructural damage, [rom Liver flooding in Australia, is rare. E"or: example, for over a 1,000 flcod effected properties in the Sydney event of 1986, there were no such cases. In Sydney