4. Aquatic Ecosystem Values of the Arrow River
Update of scientific information for the Arrow catchment: 2012-2017 July 2017 Otago Regional Council Private Bag 1954, Dunedin 9054 70 Stafford Street, Dunedin 9016 Phone 03 474 0827 Fax 03 479 0015 Freephone 0800 474 082 www.orc.govt.nz © Copyright for this publication is held by the Otago Regional Council. This publication may be reproduced in whole or in part, provided the source is fully and clearly acknowledged. ISBN [get from Comms Team] Report writer: Dean Olsen, Manager, Resource Scientist Xiaofeng Lu, Resource Scientist, Hydrology Pete Ravenscroft, Environmental Resource Scientist, Freshwater Reviewed by: Maurice Duncan, NIWA Scientist Applied Hydrology Published [Dec 2017] Update of scientific information for the Arrow catchment i Technical summary The Arrow River (catchment area: 236 km²) is located in Central Otago. Its headwaters are in the Harris Mountains, and in the lower reaches it is bordered by the Crown Range; it flows in a south-east direction, joining the Kawarau River near the township of Arrowtown. The climate is typical of Central Otago being characterised by cold winters and warm, dry summers. There are 22 existing surface water takes in the Arrow River catchment, with a total allocation of 2.03m³/s, although the measured usage does not exceed 1 m3/s and the average take is approximately 0.55 m³/s. The objective of this report is to present the findings of further investigations into the hydrology, ecology, and irrigation practices of the Arrow catchment since the last published report on this topic in 2012 (Management flows for aquatic ecosystems in the Arrow River (2012).
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