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The impact of urban groundwater upon surface water - eTheses ...

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Fluoride Concentration mgl -1<br />

46<br />

41<br />

36<br />

31<br />

26<br />

21<br />

16<br />

11<br />

6<br />

1<br />

Surface Water Concentration Pr<strong>of</strong>iles Combined with Data from Riverbed and Riverbank<br />

Piezometers<br />

28/02/01<br />

22/05/01<br />

23/05/01<br />

11/05/01<br />

30/07/01<br />

19-20/7/00<br />

26/07/00<br />

R.bed 2001<br />

R.bank 2001<br />

R.bed 2000<br />

R.bank 2000<br />

Aquifer<br />

High concentration fluoride<br />

plume discharging through one<br />

side <strong>of</strong> the river channel.<br />

Maximum concentration<br />

Riverbed 198 mgl -1<br />

Riverbank 71 mgl -1<br />

-4<br />

-5000 -3000 -1000 1000 3000 5000 7000 9000<br />

Distance downstream from pr<strong>of</strong>ile 5 (metres)<br />

Figure 7.9 Longitudinal concentration pr<strong>of</strong>ile for fluoride in <strong>surface</strong> <strong>water</strong> and <strong>ground<strong>water</strong></strong>.

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