| Title | Chemical and Physical Changes in the Outflow from Whakarewarewa to the Puarenga Stream Rotorua 1982-1988 |
|---|---|
| Authors | Glover, R. B. |
| Year | 1988 |
| Conference | New Zealand Geothermal Workshop |
| Keywords | |
| Abstract | The Puarenga Stream forms part of the boundary of the Whakarewarewa thermal area and carries the discharge from Whakarewarewa to Lake Rotorua. The stream has been sampled on 57 occasions between 1982 and 1988. The chloride content of the inflow and the enthalpy show a linear relationship which extrapolates well to other features in the area. The chloride inflow increased from early 1985 to early 1986 and again from mid 1987 to May 1988. When the effects of changes in flows from wells and a "blow out" that flowed into the Puarenga Stream are subtracted there is a nett increase of chloride from 60 to 71 g/s. This together with increased Cl/SO* ratios suggest more deep water is reaching the surface. |