Physicochemical coastal groundwater dynamics between Kauhakō Crater lake and Kalaupapa settlement, Moloka‘i, Hawai‘i

Ferdinand Oberle; Olivia Cheriton; Peter W Swarzenski; Eric K. Brown; Curt D. Storlazzi

doi:10.1016/j.marpolbul.2022.114509

Physicochemical coastal groundwater dynamics between Kauhakō Crater lake and Kalaupapa settlement, Moloka‘i, Hawai‘i

Marine Pollution Bulletin

By: Ferdinand Oberle, Olivia Cheriton, Peter W Swarzenski, Eric K. Brown, and Curt D. Storlazzi

https://doi.org/10.1016/j.marpolbul.2022.114509

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Data Release: USGS data release - Physicochemical measurements of the coastal aquifer and coastal groundwater discharge on Kalaupapa, Moloka'i, Hawaii
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Abstract

Land-based sources of groundwater pollution can be a critical threat to coral reefs, and a better understanding of “ridge-to-reef” water movement is required to advance management and coral survival in the Anthropocene. In this study a more complete understanding of the geological, atmospheric, and oceanic drivers behind coastal groundwater exchange on the Kalaupapa peninsula, on Moloka‘i, Hawai‘i, is obtained by analyzing high resolution geochemical and geophysical time-series data. In concert with multiyear water level analyses, a tidally and precipitation-driven groundwater connection between Kauhakō Crater lake and submarine groundwater discharge (SGD) fluxes are demonstrated. Results include an average discharge rate of 190 cm d⁻¹ and the detection of water-flow pathways past cesspools that likely contribute to higher nutrient loading near the SGD sites. This underlines the importance of managing anthropogenic nutrients that enter the shallow freshwater lens such as through cesspools and are consequently discharged via SGD onto coral reef habitats.

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Additional publication details
Publication type	Article
Publication Subtype	Journal Article
Title	Physicochemical coastal groundwater dynamics between Kauhakō Crater lake and Kalaupapa settlement, Moloka‘i, Hawai‘i
Series title	Marine Pollution Bulletin
DOI	10.1016/j.marpolbul.2022.114509
Volume	187
Year Published	2023
Language	English
Publisher	Elsevier
Contributing office(s)	Pacific Coastal and Marine Science Center
Description	114509, 12 p.
Country	United States
State	Hawai'i
City	Kalaupapa
Other Geospatial	Kauhakō Crater Lake, Kalaupapa Peninsula, Moloka'i
Google Analytic Metrics	Metrics page