Alice Springs Flood Investigation and Floodplian Mapping Study
WRM Water & Environment Pty Ltd
Northern Territory. Department of Lands, Planning & the Environment
E-Publications; PublicationNT; E-Books; EXTA1463
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.
Made available via the Publications (Legal Deposit) Act 2004 (NT).
1. Introduction -- 2. Catchment Description -- 3. Available Data -- 4. Calibration and Verification Events -- 5. Hydrologic Model Calibration and Verification -- 6. Hydraulic Model Development -- 7. Hydraulic Model Calibration -- 8. Flood Frequency Analysis -- 9. Design Event Hydrology -- 10. Design flood levels and extents -- 11. Conclusion -- 12. References -- Appendix A
Alice Springs Flood Investigation; Floodplain Mapping; Flood control; Northern Territory; Alice Springs; Flood damage prevention; Floodplain management
WRM Water & Environment Pty Ltd
vii, 95 pages : colour maps ; 30 cm.
WRM Water & Environment Pty Ltd and Northern Territory Government
0269-02-C1 12 October 2015 21 4.2 CALIBRATION EVENT DATA 4.2.1 March 1983 Data Figure 4.1 and Figure 4.2 show the recorded cumulative rainfalls and water levels respectively at the various rainfall and stream flow gauging stations within the Todd River Catchment for the March 1983 flood event. The following is of note: Rainfall data for Station Creek at Bonds Springs station (No R0060018) for the period 15/03/1983 to 23/03/1983 are not consistent with data for other rainfall stations in the catchment. For this reason, data for this station were not used for model calibration. Rainfall data for the Todd River at Anzac Oval station (No R0060009) for the period 18/03/1983 to 19/03/1983 is not consistent with other stations in the catchment. It appears that this station has missed recording data during the above period. Therefore, the rainfall pattern for the above period was adjusted to be consistent with the other nearby stations. Water level data recorded at all 8 gauging stations appear to be satisfactory. However, only data at the Todd River at Wigley Gorge, Charles River at Big Dipper, Todd River at Anzac Oval, Todd River at Heavitree Gap and Emily Creek Upstream Undoolya Road gauges were used in the hydrologic model calibration because of the unavailability of suitable rating curves for the other three stations. The Todd River at Amoonguna gauge was used in the calibration of the hydraulic model. Figure 4.1 Cumulative Rainfalls in the Todd River Catchment, March 1983 Flood Event