| Title | ONEKENEKE STREAM, TAUPO: HISTORICAL CHANGES AND THEIR CAUSES |
|---|---|
| Authors | K. Luketina, Y. Yuafrinaldi, S.J. Zarrouk |
| Year | 2015 |
| Conference | New Zealand Geothermal Workshop |
| Keywords | Onekeneke, Waipahihi, Tauhara, Taupo, geothermal springs, geophysics, geothermometry |
| Abstract | The hot Onekeneke Stream in Taupo, New Zealand, has changed markedly in flow and chemistry since the 1890s. It once produced a large flow of heavily mineralised water, but now has a much smaller outflow of mixed water. We examine the history of the stream from the 1890s through to 2014 and its changing flows and chemistry, the causes of the changes, and the effects of the changes on the stream’s natural environment and cultural uses. Major changes occurred in 1931 and from the 1960s onwards. We conclude that the main causes of the stream’s reduced flow are most likely to be due to subsurface hydrology changes caused by the 1931 Napier earthquake, and the effect of urbanization on the local near-surface hydrology |