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

T echnical R eport W R A 89053 V iew ed at 03:02:00 on 18/02/2010 P age 101 of 139. I I Ii TABLE 1 COMPARISON OF DAM OPTIONS 1~~lo=Ptlon~I=~=:ted~I==~==~========================r=~==~==r=~==9===911 ) $ million Pipe Dilrnt!:ter In Base of Dam Energy DiSSipation on end of Pipe thru S .... Flood Mitigation Performance (at dam) Frequency of flow In spillway channel Time to Empty Impact on Freshesth(U Town Depth of Water Qver Will. Tce for Regular FrMhas (up to 6 yr) (ml Ability to Rekul8e wlter during dry periods Estimated mOln annuli bed dear.tatlon downstream of dam (m'/s) (Note 8) I II II (Nato 61 (ml (Note 71 Pea", Flow mJ/s lOa Yr Flood 11 % AEPI ilme of Peak h' (Note 101 Time to Reacn ZOOm: s at dam hr. (Note 101 Peak Flow m)/s 10 Yr Flood (10% AEP) Time of Peak (Note 10) Time to Resch 200m l /s INoto 10) 6 Yr Flood (20% AEPI Peak Flows Time of Peak Time to Reach 200m'l. at dam (Note 8.10) (Note 12) (Note 13) (Note 16) (Note 18) (Not. 19) (Note 20) l' II, No Dam I N/A N/A 1.7 N/A (Note 10) It IN ate 1} I I Full Dam It INote 21 I i Partially 1'1' Full Dam I i with Pipe I Capacity 21.33 40 1.0 with 'Valv~ I IIII of: IN::,:~ I 21 I lwlth 11:;1 ' reducer) 10mJ /s 21.46 1.0 20mJ /s 21.67 1.4 II III, III ]11--1 -60-m"s-+-i 2-1.97---+-1 2-.1 ---: 11},t-1 _-+-----+-_ I I lOOmJ/s 22.28 3.0 DisperSion V.lve (norm.lly close(H USSR Impact Type DiSSipater Reinforced Concrete StillinQ BHin below bee of river and dowrrstre.m weir 490 400 14901 (Note 9) 400 1490) (Note 9) 400 1490) (Note 9t 400 14901 (Note 9) 400 14901 (Note 91 8.5 9 9 9 9 9 2 4.6 4,6 4.6 4,6 4.6 356 6.6 147 9 148 9 149 9 164 9 164 9 2.5 N/A (Note 1 I) N/A INote 111 N/A (Note 11) N/A INote 111 N/A (Note 111 290 40 40 41 50 96 6.5 11.6 11.6 11.6 11 9.6 3 N/A (Note 111 N/A INote 11) N/A (Note 111 N/A (Note 111 N/A (Note 11) Less than 1 ve.r 2~3 years 3 yeers 3 years 4 years 6 years ODeS not em'pty (Not. 14) 26 doys 13 days 6.6 days 2.6 days 1.8 dlilYs Neol;gible (Not.16) MOlt mpa(;( for paJUlilllly full dllm t } A"","" trOWI up to pipe c.~ty Pfolon~&d. ul/get Uullh,e. wit) onlV OCCI,I, down river'lltlen Spill'tfay ()pelat~. Chatl~ R will '1111 cxxltntxnl! to IIY.h~. le.ltl1 ilppaGt for Ptlruafl'l full 0.-" (Not. 171 1.3 0.2 0.3 ,0.4 0.6 0.9 Yo. Yes 300ML maximum Yes 300ML Yes 300ML Yeo 300ML Ye. 300ML 12000 6000 7600 8600 9600 10000 I I I I J I I I I ComPletely INote 61 6.6 ConstruCt 470 9 I 397 6 1.5 360 6.6 2 100 yeM' less than I Negligible I 1.4 I No I 12000 ) I Empty Dam channel lhru 1 day I (600mJ/s) 20.81 rock. on nght ! IN "to 41 bank _ I I I ) I I I I I I I I __ I I I ,='1 I'