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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 .〔(Land Air Water Aotearoa )〕 The Waingaro River is one of the largest sources of sediment in Whaingaroa Harbour, partly because it is 99 percent unfenced.〔(Regional Council report on Whaingaroa Harbour Care )〕 == Geology == The lower river flows over Puaroan age (about 150 million years ago), blue-grey Puti siltstone.〔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〕 Waingaro Hot Spring was closed in 2014 until improvements are made.〔(Council closure notice )〕 It has dilute alkaline NaCl-type (salty), ,〔(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 )〕 thermal water flowing from early Jurassic basement rocks at about per minute,〔(Geological Survey Professional Paper, Volume 492 1965 page 242 )〕 probably originating at least deep.〔(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 )〕 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. 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.〔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 )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Waingaro River (Waikato)」の詳細全文を読む スポンサード リンク
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