Territory Stories

Inquiry into the Alice Springs Recreation Lake : submission by Department of Transport and Works



Inquiry into the Alice Springs Recreation Lake : submission by Department of Transport and Works


Marquardt, A.


E-Publications; E-Books; PublicationNT; Report ; 1/1983




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


Date:1983-12; Contains: Floodplains Management Alice Springs Impacts of Todd River Flooding. Also filed in Alice miscellansous collection A0342, A0343.



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Dept. of Transport and Works

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Report ; 1/1983

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Technical Report WRD83001 Viewed at 14:07:22 on 29/07/2010 Page 22 of 64. I !I L: 1 \ , ; : I I I' II I I I ! Ii , ( f) S i 1 ta tion p~elimina~y obse~vations of the catchment area indicated that the sediment vield of the river is likely to be lo;,"er than that of the Todd River. However, no detailed studies of sediment concentration or catchment condition have been carried out. (g) Flood Mitigation The downstream community of Iwupataka is situated primarily above flood prone land. The impact of floods in Jay-Creek is probably greater in respect of the causeways Hhere the Eermannsburg and Standley Chasm roads cross it, as the causeways are cut by the larger floods. It is doubtful whether the Ildjarabada lake would have substantial mitigating effect on such flood impact.. The geometry of 1:ne site and spillway saddles does not lend itself to a design promoting significant attenuation unless a much smaller lake were acceptable for recreation. (h) Irrigation The lake water could be used for local landscaping and ablutions. It is possible that a small draft could be tclerated for use on gardens in Iwupatak:a ,.;i thout majo~ effect on the lake. (i) Downstream Ef~ects The main downstream effects would be reductions in rate I duration and volume of do~.;nstream flow. These have not been qua!1tified, but ;,"ould probably be in similar proportion to the reductions for the Telegraph Station site - that is, not of major significance. Local scour could be expected immediately be 10"; the spillway. There are no significant groundwater basins r"",ithin about seven kilometres downstream of the sitei it is believed that a change in the flow behaviour would have no major impact on groundwater systems. (j) Sacred Sites A prelininary 1977 failed to be affected. this matter. inspection with the Central Land Council in identify any sites of significance which would However, no further action has been taken on (k) Other Environmental Issues No other issues have been raised or considered. 11 : Al-<uYS

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