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Document Type
Poster
Publication Date
2-2026
Abstract
Hydroelectric power plays a crucial role in New Zealand’s renewable energy system and depends on consistent and reliable rainfall and river flow. This study analyzes hydrologic variability in two Wairoa River catchments in the Northland Region of New Zealand, the Mangahahuru River (Site 46674) and the Kaihu River at Gorge (Site 46611). Over four months, streamflow data provided by the University of Otago, Department of Geography was analyzed using R in RStudio to examine flood frequency, seasonal drought periods, and long-term flow trends. Both catchments were evaluated with approximately 95% completeness. The comparison in flow trends between the rivers highlights differences in flow variability between the two tributaries and demonstrates how catchment characteristics influence river dynamics and water availability. This study provides insight for practicing Mãori sustainable water and land management while balancing hydroelectric energy reliability.
Department
Department of Geography, University of Otago, Leith River, North Dunedin, New Zealand
Project Mentor
Professor Tim Cope
Recommended Citation
Anderson, Ryan '26, "Rivers Reimagined: Floods, Droughts, and the Future of Hydrologic Systems in Aotearoa" (2026). Annual Student Research Poster Session
. 240.
https://scholarship.depauw.edu/srfposters/240
Funding and Acknowledgements
DePauw University, Hubbard Center.
I would like to thanks to Dr. Sarah Mager and Kate Hodgson for their contribution and assistance in my analysis and providing the equipment to accurately measure river trends and conduct the comparative analysis. I would also like to thank my advisors, Professor Tim Cope, Professor Kenneth Brown and Amber Hecko for devoting time into supporting this project.