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Alice Springs town basin, review 2003



Alice Springs town basin, review 2003


Read, R. E.


E-Publications; E-Books; PublicationNT; Report ; no. 42/2003




Made available via the Publications (Legal Deposit) Act 2004 (NT).





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Department of Infrastructure, Planning and Environment

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Alice Springs


Report ; no. 42/2003

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A- 2 The calculation was repeated for the period 1981 to 1993, and again correcting the discharge to that at Anzac. This gave a chloride flux of 1220 T/yr. It would be expected that the estimate would be lower as most chloride will move in very wet years. It is concluded that annual chloride flux at Heavitree Gap is in the range 1000 to 3000 T/yr, and that salt flux is in the range 3000 to 10 000 T/yr. 0.001 0.01 0.1 1 10 100 1000 Discharge m3/s 1 10 100 1000 Ch lo rid e m g/ L Y = pow(X,-0.3179688813) * 21.14102273 Number of data points used = 32 Res idual sum of squares = 13.5288 Regression sum of squares = 12.8315 Coef of determination, R-squared = 0.486774 Res idual mean square, sigma-hat-sq 'd = 0.450961 Wigley Anzac Heavitree Heavitree, best fit Anzac, best fit Heavitree, November 2002 gauging Y = pow(X,-0.8588891362) * 763.4239404 Number of data points used = 7 Residual sum of squares = 3.90209 Regression sum of squares = 3.87424 Coef of determination, R -squared = 0.498209 Residual mean square, sigma-hat-sq 'd = 0.780418 Figure A-1 Chloride versus discharge at gauging stations Chinaman Creek (Bradshaw Drain) This is a discharge point from the western side of the Town Basin. It discharges into the Todd, adding to the saline outflow through the Gap. Table A-2 shows 14 analyses from Chinaman Creek. No flow data is available. TDS values range from about 200 mg/L to about 5000 mg/L. The high values presumably represent groundwater discharge, and the lower ones are for periods when this is being diluted by surface runoff. Figure A-2 shows a Durov Plot for this data and RN 3064 which is in the Todd just below where Chinaman Creek enters it.