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Towards baseflow index characterisation at national scale in New Zealand

journal contribution
posted on 2024-06-21, 03:51 authored by Shailesh Singh, Markus Pahlow, Doug Booker, Ude Shankar, Alejandro Chamorro
BaseFlow Index (BFI) was determined for all river reaches in New Zealand. A recursive digital filtering technique was applied to 482 gauged sites across New Zealand, then an individual filter parameter was determined for each catchment. BFI varies between 0.20 and 0.96 with an average of 0.53, which indicates 53% of long-term streamflow in New Zealand is likely to originate from groundwater discharge and other delayed sources. This dataset can support water resources planning and management in New Zealand, in particular water supply, stream ecology and pollution risk. The methodology is applicable to any region around the world.

Funding

Funded by the New Zealand Ministry for Business, Innovation and Employment's Our Land and Water National Science Challenge (Toitū te Whenua, Toiora te Wai) as part of project Sources and Flows

History

Publication date

2019-01-07

Language

  • English

Does this contain Māori information or data?

  • No

Journal title

Journal of Hydrology (New Zealand)

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