Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981
Alligator Rivers Region - Regional Surface Water Quality Monitoring, Volumes 1,2,3 (Plus draft)
Northern Territory. Department of Transport and Works. Water Division, Environmental Section
E-Publications; E-Books; PublicationNT; Report ; 49/1983
At head of title: Water Division, Dept. of Transport & Works, Northern Territory. "April 1983".
Water quality -- Northern Territory -- Alligator Rivers Region; Hydrology -- Northern Territory -- Alligator Rivers Region
Northern Territory Government
Report ; 49/1983
3 volumes. ; 30 cm
Attribution International 4.0 (CC BY 4.0)
Northern Territory Government
https://hdl.handle.net/10070/672725 [Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981 - WRD83049_v_1.pdf]; https://hdl.handle.net/10070/672727 [Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981 - WRD83049_v_2.pdf]; https://hdl.handle.net/10070/672729 [Alligator Rivers region regional surface water quality monitoring : November 1978 - April 1981 - WRD83049_v_3.pdf]
Technical Report WRD83049 Viewed at 14:07:10 on 29/07/2010 Page 48 of 440. I I I I I I I I I I I I I I I I I I I I R.S.P. 377 1175 1176 1179 4 7. TABLE 7 .1 Con t' d WATER QUALITY SUMMARY COONJI~A BILLABONG - This is a permanent billabong on Coonjimba Creek (which has been diverted by the Ranger tailings dam and retention pond 1). It is a backflmv billabong classified (1) as being completely hydrogeologically isolated. Towards the end of the dry season the billabong tends to become turbid, and conductivity and nutrient rise. Some parameters (eg. suspended solids and pH) may have been affected by activities on the Ranger site. Some fluctuation in uranium concentration are observed and these appear to be cyclic due to first flush phenomena. GOANNA BILLABONG - This is a permanent waterhole on Baralil Creek. It is a backflow billabong, backflowing from Gulungul Creek and is classified by Walker and Tyler (1) as having perched water table and eutrophic conditions due primarily to algae content. The billabong shows large increases in suspended solids and nutrient, and smaller increases in conductivity, sodium and bicarbonate towards the end of the dry season. Fluctuation in pH, and correspondingly, heavy metals occurs, particularly on the "first flush". Eutrophic conditions do occur and algae growth is observed. Some large fluctuations in pH, zinc and uranium concentrations may be attributable to reducing conditions on the bed of the billabong. GULUNGUL BILLABONG - This is a waterhole on Gulungul Creek. It is classified by Walker and Tyler (1) as a backflow billabong (backflowing from the Magela) being hydrogeologically isolated. Water is present 10-12 months of the year, and flow occurs only for a few months of the year. Large increases are observed in turbidity, conductivity and nutrients towards the end of the drv season. Fluctuations in pH are observed particularly as the site dries up. Some fluctuations in uranium concentrations are also observed. COR~DORL BILLABONG - This is a backflow billabong similar in characteristics to Gulungul Billabong (i.e. hydrogeologically isolated). It only contains water 10-12 months of the year, and may backflow from the Magela. It shows large increases in suspended solids and conductivity plus smaller increases nutrients towards the end of the d~J season. Similar fluctuations in pH and heavy metals are also observed.
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