Waingaro River (Waikato)
| Waingaro River | |
|---|---|
 Waingaro Landing and mangroves at mouth of Waingaro River | |
| Mouth | Raglan Harbour |
| Basin countries | New Zealand |
| Length | 18 km (11 mi) |
| Source elevation | 150 m |
| Mouth elevation | 0 m |
| Basin area | 123 km2 |
The Waingaro River is a river of the Waikato region of New Zealand's North Island. It flows generally southwest from its origins west of Ngaruawahia to reach a northern arm of Raglan Harbour (see 1:50,000 map). Its main tributary is Kahuhuru Stream, which Highway 22 follows for several kilometres. Tributaries total about 170 km.[1]
The Waingaro River is one of the largest sources of sediment in Whaingaroa Harbour, partly because it is 99% unfenced.[2]
Geology
The lower river flows over Puaroan age (about 150 million years ago), blue-grey Puti siltstone.[3]
Waingaro Hot Spring was closed in 2014 until improvements are made.[4] It has dilute alkaline NaCl-type (salty), 37-54C,[5] thermal water flowing from early Jurassic basement rocks at about 350 litres per minute,[6] probably originating at least 3 km deep.[7]
In 1921 this description was given - "Waingaro/ on the coach-road from Ngaruawhahia ' to the west coast, has waters of the most strictly simple " thermal" type, containing only 22 grains of solids to the gallon. It is not a " spa," though it is used locally and had at one time a great reputation among the Maoris. The outflow of water is very large and the temperature high. There is a large simple immersion bath, with hotel accommodation alongside.
ANALYSIS Grains per gallon.
Sodium chloride 6-43
Silica 7-80
Total solids 22-66
Temperature . 130 °F."[8]
In 1942 a corrugated iron shelter, which had covered the spring on the north side of the road, was swept away by a flood. After that the hot water was piped under the road and the present complex of baths built.[9]
| Spring | Date sampled | TD°C | pH(20 °C) | Li | Na | K | Ca | Sr | Ba | B | HCO3 | SiO2 | SO4 | F | Cl | I | ΔD ‰ | δ18O ‰ | T (SiO2) °C |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Waingaro well | 12/05/2005 | 54.7 | 9.2 | 0.05 | 79 | 0.73 | 1.2 | 0.005 | 0.0004 | 4.9 | 44 | 55 | 8.3 | 3.5 | 49 | 0.029 | -31.5 | -5.74 | 83 |
See also
References
- ↑ Land Air Water Aotearoa
- ↑ Regional Council report on Whaingaroa Harbour Care
- ↑ Geology of the Raglan-Kawhia Area: Institute of Geological & Nuclear Sciences (N.Z.), Barry Clayton Waterhouse, P. J. White 1994 ISBN 0-478-08837-X
- ↑ Council closure notice
- ↑ list of hot pools, temperatures, flow rates, etc in Geothermal Resources In New Zealand An Overview: Trevor M. Hunt, Wairakei Research Centre, Institute of Geological & Nuclear Sciences Ltd 1998
- ↑ Geological Survey Professional Paper, Volume 492 1965 page 242
- ↑ Naike Hot Springs: A Hot Spring System (N Island, New Zealand) S. Siswojo, A.S. Kasonta, M.P. Hochstein Geothermal Institute, University of Auckland 1985
- ↑ The Hot Springs of New Zealand: Arthur Stanley Herbert 1921
- ↑ The End of an Era: Gwyneth Jones 2010
- ↑ Journal of Volcanology and Geothermal Research 2010 - Sources of solutes and heat in low-enthalpy mineral waters and their relation to tectonic setting, New Zealand: A.G. Reyes, B.W. Christenson, K. Faure
- "Place Name Detail: Waingaro River (Waikato)". New Zealand Geographic Placenames Database. Land Information New Zealand. Retrieved 12 July 2009.
- New Zealand 1:50000 Topographic Map Series sheet BD32 – Raglan
External links
 |
Wikimedia Commons has media related to Waingaro River (Waikato). |
- most of the river is close to Ohautira and Waingaro Roads, so many images are available in street scene on https://maps.google.com/
- water quality at Ruakiwi Rd
- water level at Waingaro
- Waingaro Landing - National Library historic photos
- New Zealand Herald 17 June 1893 - description of hot springs and their history.
Coordinates: 37°44′36″S 174°57′30″E / 37.74333°S 174.95833°E