| Title | Flow in the Roto-A-Tamaheke Catchment |
|---|---|
| Authors | Bradford, E., Timpany, G.C. and Murray, R.E. |
| Year | 1986 |
| Conference | New Zealand Geothermal Workshop |
| Keywords | |
| Abstract | The Roto-a-Tamaheke catchment is situated at the eastern end o f the Whakarewarewa Thermal Reserve a t Rotorua. It contributes about 30% of the flow from the Whakarewarewa area and is the largest natural feature in the area. The two outflows and the rainfall are monitored continuously. The component of flow generated by rainfall is calculated in two ways. One uses a model of the catchment with parameters estimated from knowledge of a neighbouring catchment. The other uses the data analysis techniques. Once the rainfall component has been removed, the remaining flow comes from springs and thermally heated ground water. The variation of this spring flow is considered in relation to changes in the shallow ground water, and geothermal aquifer pressures. |