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

74 Table A1. Flow characteristics by month for Dorisvale gauging station (G8140067), Daly River, Northern Territory. Daily gaugings were averaged for each month. Data from months where there were less than 20 gauged days were excluded. Statistics were then calculated across years for each month. Abbreviations: Min, Minimum; Max, Maximum; SD, Standard Deviation; SE, Standard Error; CV, Coefficient of Variation; N, sample size (months). Month Mean Min Max SD SE CV N Jan 277.40 19.73 1803.74 382.40 65.58 137.85 34.00 Feb 602.64 23.31 1719.27 505.68 86.72 83.91 34.00 Mar 767.36 19.01 3710.48 943.69 157.28 122.98 36.00 Apr 96.06 4.90 356.31 103.92 17.09 108.19 37.00 May 20.43 2.23 86.36 17.82 2.85 87.22 39.00 Jun 10.52 2.14 34.40 6.71 1.09 63.82 38.00 Jul 7.82 2.42 22.60 4.16 0.67 53.21 38.00 Aug 5.83 2.22 11.38 2.29 0.38 39.29 37.00 Sep 5.29 2.02 10.97 2.23 0.37 42.26 37.00 Oct 5.73 2.11 19.00 3.40 0.56 59.28 37.00 Nov 12.39 3.30 40.19 9.58 1.60 77.30 36.00 Dec 82.05 11.82 293.48 75.62 12.97 92.17 34.00 Table A2. Percentiles for flows by month at Dorisvale gauging station (G8140067), Daly River, Northern Territory. Data from months where there were less than 20 gauged days were excluded. Mth Max 95% 90% Q3 Media n Q1 10% 5% Min N Jan 8099.54 1010.46 675.93 288.780 98.766 32.699 15.7850 12.6130 2.717 1041 Feb 7282.62 2131.56 1469.94 710.975 334.225 126.777 40.4670 22.8540 5.421 956 Mar 6261.62 3657.27 2279.18 905.136 230.711 71.716 24.2190 15.1370 5.566 1106 Apr 1245.49 388.64 238.97 100.254 40.498 17.949 7.3090 4.9610 3.179 1110 May 186.28 58.76 43.59 24.181 13.115 8.162 4.4270 2.9330 1.673 1193 Jun 41.85 23.23 19.26 13.746 8.535 5.637 3.4425 2.6995 1.687 1140 Jul 27.08 15.63 13.56 9.734 6.856 4.831 3.2950 2.6860 2.127 1178 Aug 12.53 10.48 9.03 7.089 5.594 4.006 3.1630 2.6310 2.098 1138 Sep 22.48 9.49 8.31 6.388 4.681 3.654 2.9250 2.2450 1.924 1109 Oct 167.62 9.99 8.25 6.347 4.522 3.411 2.7340 2.3710 1.892 1147 Nov 257.01 41.40 25.45 12.536 6.702 4.220 2.8930 2.6860 1.538 1068 Dec 1243.52 339.03 228.43 92.088 24.685 10.983 5.6920 4.1840 2.857 1039