Territory Stories

Alice Springs Flood Investigation and Floodplian Mapping Study

Details:

Title

Alice Springs Flood Investigation and Floodplian Mapping Study

Creator

WRM Water & Environment Pty Ltd; Northern Territory. Department of Lands, Planning & the Environment

Editor

Roads, Greg

Collection

E-Publications; PublicationNT; E-Books; EXTA1463

Date

2015-10-12

Location

Alice Springs

Description

Made available via the Publications (Legal Deposit) Act 2004 (NT).; WRM Water & Environment (WRM) was commissioned by the Department of Lands & Planning (DLP) to undertake a flood study of the Todd River in the Alice Springs area. The aim of the study is to develop a 2 dimensional flood model, which allows flood flow in a complex flood plain to be modelled, to determine the extent and severity of riverine flooding in the town of Alice Springs and the Alice Springs rural area south of Heavitree Gap. The purpose of the study is to produce floodplain maps of the Alice Springs and its rural area for land use planning and counter – disaster purposes. This study is an extension of the Alice Springs Farms Area Floodplain Mapping Study (WRM, 2006), undertaken by WRM on behalf of the Department of Planning & Infrastructure in 2006 in order to develop detailed Todd River floodplain maps for the rural area south of Alice Springs.

Table of contents

1. INTRODUCTION -- 2. CATCHMENT DESCRIPTION -- 3. AVAILABLE DATA -- 4. CALIBRATION AND AND VERIFICATION EVENTS -- 5. HYDROLOGIC MODEL CALIBRATION AND VERIFICATION -- 6. HYDRAULIC MODEL DEVELOPMENTLOPMENT -- 7. HYDRAULIC MODEL CALIBRATION -- 8. FLOOD FREQUENCY ANALYSIS -- 9. DESIGN EVENT HYDROLOY -- 10. DESIGN FLOOD LEVELS AND EXTENTS -- 11. CONCLUSION -- 12. REFERENCES

Language

English

Subject

Flood control -- Northern Territory -- Alice Springs; Flood damage prevention -- Northern Territory -- Alice Springs; Floodplain management -- Northern Territory -- Alice Springs; Alice Springs Flood Investigation; Floodplain Mapping

Publisher name

WRM Water & Environment Pty Ltd

Place of publication

Darwin (N.T.)

Series

EXTA1463

Format

vii, 95 pages : colour maps ; 30 cm.

File type

application/pdf.

Copyright owner

Check within Publication or with content Publisher.

Parent handle

https://hdl.handle.net/10070/259732

Citation address

https://hdl.handle.net/10070/494349

Page content

0269-02-C1 12 October 2015 i TABLE OF CONTENTS Page 1 INTRODUCTION 1 2 CATCHMENT DESCRIPTION 4 2.1 UPSTREAM CATCHMENT 4 2.2 STUDY AREA 4 2.2.1 Alice Springs 4 2.2.2 Rural Area 4 3 AVAILABLE DATA 8 3.1 DATA OVERVIEW 8 3.2 RAINFALL DATA 8 3.3 STREAMFLOW DATA 8 3.4 STREAM GAUGE RATING CURVES 12 3.4.1 General 12 3.4.2 Todd River at Wigley Gorge (G0060046) 14 3.4.3 Charles River at Big Dipper (G0060047) 14 3.4.4 Todd River at Anzac Oval/Wills Terrace (G0060009) 15 3.4.5 Todd River at Heavitree Gap (GS0060126) 16 3.4.6 Emily Creek Upstream Undoolya Road (GS0060017) 17 3.5 HISTORICAL FLOOD DATA 19 3.6 TOPOGRAPHIC DATA 19 4 CALIBRATION AND VERIFICATION EVENTS 20 4.1 ADOPTED CALIBRATION AND VERIFICATION EVENTS 20 4.2 CALIBRATION EVENT DATA 21 4.2.1 March 1983 Data 21 4.2.2 March / April 1988 Data 22 4.2.3 April 2000 Data 24 4.3 VERIFICATION EVENT DATA 25 5 HYDROLOGIC MODEL CALIBRATION AND VERIFICATION 27 5.1 MODEL DESCRIPTION 27 5.2 URBS MODEL CONFIGURATION 28 5.3 CALIBRATION AND VERIFICATION METHODOLOGY 31 5.4 CALIBRATION RESULTS 31 5.4.1 General 31 5.4.2 March 1983 Flood Event 33 5.4.3 March / April 1988 Flood Event 36 5.4.4 April 2000 Flood Event 39 5.5 VERIFICATION RESULTS 40 6 HYDRAULIC MODEL DEVELOPMENT 44 6.1 GENERAL 44


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