Territory Stories

Modelling dry season flows and predicting the impact of water extraction of flagship species

Details:

Title

Modelling dry season flows and predicting the impact of water extraction of flagship species

Creator

Georges, Aurthur; Webster, Ian; Guarino, Fiorenzo; Jolly, Peter; Thoms, Martin; Doody, Sean; CRC for Freshwater Ecology (Australia); University of Canberra. Applied Ecology Research Group

Collection

E-Publications; E-Books; PublicationNT; 57/2002; National River health program

Date

2002-11-20

Location

Daly River

Abstract

The aim of this project is to contribute to recommendations on environmental flows to ensure that they are consistent with maintaining the biota of the Daly River, given competing demands of agriculture, recreation and tourism, conservation and Aboriginal culture. Our focus is on flow, connectivity and water temperatures.

Notes

Made available by via Publications (Legal Deposit) Act 2004 (NT); Submitted to the Northern Territory. Department of Infrastructure Planning and Environment

Table of contents

1. Project Details -- 2. Executive Summary -- 3. Interpretation of the Brief -- 4. Variation of the Brief -- 5. Background -- 6. The Daly Drainage -- 7. The Pig-nosed turtle -- 8. Analysis of Historical Flow Data -- 9. Analysis of Contemporary Flow Data -- 10. Modelling Flow Reduction -- 11. Water Temperature Versus Flow -- 12. Impact on Flagship Species -- 13. References

Language

English

Subject

Environmental Flows; Modelling; Biota

Publisher name

Northern Territory Government

Place of publication

Palmerston

Edition

Final Report

Series

57/2002; National River health program

Format

75 pages ; 30 cm

File type

application/pdf

Use

Attribution International 4.0 (CC BY 4.0)

Copyright owner

Northern Territory Government

License

https://creativecommons.org/licenses/by/4.0/

Parent handle

https://hdl.handle.net/10070/885434

Citation address

https://hdl.handle.net/10070/885435

Page content

31 Table 4. Flow measured at control points on the Daly River from Dorisvale Crossing (Stn 1) to Cattle Creek (Stn 26). Contribution to flow is greatest in the 9 km between Hot Spring (Stn 10) and Black Bull Yard (Stn 15). Station Distance June 3 September 3 1 0.0 27.4 10.6 2 5.3 28.1 12.3 3 9.2 . 12.4 4 11.2 29.2 13.1 5 13.2 29.8 14.3 6 13.6 29.9 14.3 7 13.8 . 13.6 8 18.3 30.3 13.7 9 22.6 29.6 13.9 10 24.4 29.2 15.1 11 27.7 30.6 16.0 12 25.6 30.1 17.0 13 31.1 . 17.6 14 32.3 . 19.7 15 33.4 38.2 22.1 17 43.6 38.2 23.7 18 44.9 . 23.9 19 46.7 38.4 24.2 20 48.6 . 24.6 21 53.2 39.7 24.8 22 54.2 39.7 25.3 23 55.9 40.9 25.5 25 67.0 41.5 26.0 26 73.3 42.4 27.2 Surface flow inputs included Bradshaw Creek, which discharged 1.06 cumecs into the river, contributing substantially to the nett increase in flow between Dorisvale Crossing and control point 10 (Hot Spring) of only 1.8 cumecs. A substantial hot spring at control point 10 discharged 0.4 cumecs into the river, and Stray Creek discharged 2.7 cumecs. The remaining nett increase of 5.9 cumecs between control point 10 and control point 15 was from numerous small non-specific point discharges and diffuse discharge. On September 3, 2001, flow at Dorisvale Crossing was 10.6 cumecs and at Oolloo Crossing was 25.9 cumecs. There was a general base increase in flow of 0.14 cumec per km downstream from Dorisvale Crossing, punctuated by a much more substantial input of 0.79 cumecs per km between control point 10 (Hot Spring) and 15 (Black Bull Yard). A total of


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