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A copula-based analysis of severity-duration-frequency of droughts in six climatic regions of NZ

journal contribution
posted on 2024-06-21, 03:50 authored by Shailesh Singh, Alejandro Chamorro, MS Srinivasan, Lutz Breuer
We used a copula to model the joint drought duration-severity distribution and frequency to generate SDF curves for six locations in different climatic regions (3 in the North Island and 3 in the South Island). Based on a bivariate-fitted model for duration and severity, drought SDF curves for various recurrence intervals were derived. We found that North Island locations experienced more dry spells than the South Island locations. The SDF curves provide a comprehensive understanding of occurrence and duration of dry conditions, and can be a useful tool for natural resource managers in developing short and long-term drought mitigation strategies for water management and conservation.

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

2017-02-07

Language

  • English

Does this contain Māori information or data?

  • No

Journal title

Journal of Hydrology (New Zealand)

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