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Assessment of the Jabiluka Project : report of the Supervising Scientist to the World Heritage Committee



Assessment of the Jabiluka Project : report of the Supervising Scientist to the World Heritage Committee


Johnston, A.; Prendergast, J. B.; Bridgewater, Peter


E-Publications; E-Books; PublicationNT; Supervising Scientist Report; 138




Alligator Rivers Region

Table of contents

Main report--Appendix 2 of the Main Report. Submission to the Mission of the World Heritage Committee by some Australian Scientists ... --Attachment A. Johnston A. and Needham S. 1999. Protection of the environment near the Ranger uranium mine--Attachment B. Bureau of Meteorology 1999. Hydrometeorological analysis relevant to Jabiluka--Attachment C. Jones, R.N., Hennessy, K.J. and Abbs, D.J. 1999. Climate change analysis relevant to Jabiluka--Attachment D. Chiew, F and Wang, Q.J. 1999. Hydrological anaysis relevant to surface water storage at Jabiluka--Attachment E. Kalf, F. and Dudgeon, C. 1999. Analysis of long term groundwater dispersal of contaminants from proposed Jabiluka mine tailings repositories--Appendix 2 of Attachment E. Simulation of leaching on non-reactive and radionuclide contaminants from proposed Jabiluka silo banks.




Uranium mill tailings - Environmental aspects - Northern Territory - Alligator Rivers Region; Environmental impact analysis - Northern Territory - Jabiluka; Uranium mines and mining - Environmental aspects - Northern Territory - Jabiluka; Jabiluka - Environmental aspects

Publisher name

Environment Australia

Place of publication

Canberra (A.C.T.)


Supervising Scientist Report; 138


1 volume (various pagings) : illustrations, maps

File type






Copyright owner

Environment Australia



Parent handle


Citation address


Related items

https://hdl.handle.net/10070/462403; https://hdl.handle.net/10070/462400; https://hdl.handle.net/10070/462405; https://hdl.handle.net/10070/462406; https://hdl.handle.net/10070/462408; https://hdl.handle.net/10070/462409; https://hdl.handle.net/10070/462411

Page content

28 Figure 3.3.2 Relationship between evaporation and rainfall at Jabiru for the months of January, February and March There is, however, evidence that even this small effect is an over-estimate because, during the principal months of the Wet season (December to March), cloud cover is often extensive even when there is no rainfall. As a result, the relationship between evaporation and rainfall during any given month will not be linear but evaporation will tend towards a constant lower value at higher rainfall values. This effect is clearly illustrated in figure 3.3.2 where evaporation at Jabiru is plotted against rainfall for the principal Wet season months of January, February and March. The line through the data in each case is of the form bRaeEE += 0 where a and b are constants. For January and March, evaporation is essentially constant for values of rainfall above the average for the month while for February a decrease (about 6%) in evaporation is observed between the average rainfall and the maximum in the record. Hence the assumption of a linear relationship between evaporation and rainfall will result in an underestimate of the evaporation in very wet years. The inverse relationship between evaporation and rainfall could, however, have greater significance in drought years because the use of long-term average monthly values for evaporation will lead to a significant underestimate of evaporation in those years. This may lead to the need to import water from the bore field to maintain plant operation. For this January E va po ra tio n (m m ) 50 100 150 200 250 February E va po ra tio n (m m ) 50 100 150 200 250 March Rainfall (mm) 0 100 200 300 400 500 600 700 800 900 E va po ra tio n (m m ) 50 100 150 200 250

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