Publications
Filter Total Items: 199
Numerical simulation of groundwater availability in central Moloka‘i, Hawai‘i
Since the 1990s, increased chloride concentrations of water pumped from wells (much of which is used for drinking water) and the effects of withdrawals on groundwater-dependent ecosystems have led to concerns over groundwater availability on the island of Molokaʻi, Hawaiʻi. An improved understanding of the hydrologic effects of proposed groundwater withdrawals is needed to ensure effective managem
Authors
Delwyn S. Oki, John A. Engott, Kolja Rotzoll
Simulating land cover change impacts on groundwater recharge under selected climate projections, Maui, Hawaiʻi
This project developed an integrated land cover/hydrological modeling framework using remote sensing and geographic information systems (GIS) data, stakeholder input, climate information and projections, and empirical data to estimate future groundwater recharge on the Island of Maui, Hawaiʻi, USA. End-of-century mean annual groundwater recharge was estimated under four future land cover scenarios
Authors
Laura Brewington, Victoria Keener, Alan Mair
Isotopic and geochemical assessment of the sensitivity of groundwater resources of Guam, Mariana Islands, to intra- and inter-annual variations in hydroclimate
Assessing the sensitivity of groundwater systems to hydroclimate variability is critical to
sustainable management of the water resources of Guam, US territory. We assess spatial and
temporal variability of isotopic and geochemical compositions of vadose and phreatic
groundwater sampled from cave drip sites and production wells, respectively, to better
understand the vulnerability of the freshwate
Authors
Lakin Beal, Corinne I. Wong, Kaylyn K Bautista, John W. Jenson, Jay L. Banner, Mark A Lander, Stephen B. Gingerich, Judson W. Partin, Ben Hardt, N.H. van Oort
The ‘Ike Wai Hawai‘i groundwater recharge tool
This paper discusses the design and implementation
of the ‘Ike Wai Hawai‘i Groundwater Recharge Tool, an
application for providing data and analyses of the impacts of
land-cover and climate modifications on groundwater-recharge
rates for the island of O‘ahu. This application uses simulation
data based on a set of 29 land-cover types and two rainfall
scenarios to provide users with real-time rechar
Authors
Jared H. McLean, Sean B. Cleaveland, Kolja Rotzoll, Scot K. Izuka, Jason Leigh, Gwen A. Jacobs, Ryan Theriot
Water resources on Guam—Potential impacts of and adaptive response to climate change
The goals of this joint U.S. Geological Survey, University of Hawaiʻi, University of Guam, University of Texas, and East-West Center study were to (1) provide basic understanding about water resources for U.S. Department of Defense installations on Guam and (2) assess the resulting effect of sea-level rise and a changing climate on freshwater availability, on the basis of historic information, sea
Authors
Stephen B. Gingerich, Adam G. Johnson, Sarah N. Rosa, Mathieu D. Marineau, Scott Wright, Lauren E. Hay, Matthew J. Widlansky, John W. Jenson, Corinne I. Wong, Jay L. Banner, Melissa L. Finucane, Victoria W. Keener
Freshwater availability in Guam with projected changes in climate
Guam receives 85 to 116 inches of rain a year, two-thirds of which has historically fallen during the wet season. On average, three tropical storms and one typhoon pass within 80 nautical miles of Guam each year, generally during the rainy season. Both drought and flooding can impact freshwater supply and the associated infrastructure. Department of Defense (DoD) installations and non-military pop
Authors
Stephen Gingerich, Victoria Keener, Melissa L. Finucane
Guam's water resources
How do climate and humans impact freshwater resources, and how can we plan for change?
Authors
Stephen Gingerich, Victoria Keener, Melissa L. Finucane
Drought in the U.S. Affiliated Pacific Islands: Impacts to water resources
No abstract available.
Authors
Stephen Anthony
Estimated groundwater recharge from a water-budget model incorporating selected climate projections, Island of Maui, Hawai‘i
Demand for freshwater on the Island of Maui is expected to increase by 45 percent between 2015 and 2035. Groundwater availability on Maui is affected by changes in climate and agricultural irrigation. To evaluate the availability of fresh groundwater under projected future climate conditions and changing agricultural irrigation practices, estimates of groundwater recharge are needed. A water-budge
Authors
Alan Mair, Adam G. Johnson, Kolja Rotzoll, Delwyn S. Oki
Enabling real-time user interaction for decision support: Experiences extending a local agave platform metadata service
The University of Hawai'i Information Technology Services Cyber-infrastructure team in partnership with the United States Geological Survey developed the Hawai'i groundwater recharge tool, a decision support tool, as part of the 'Ike Wai Gateway to support water sustainability research for the state of Hawai'i. To enable the development of the tool within the existing University of Hawai'i Agave p
Authors
Sean B. Cleveland, Jared H. McClean, Kolja Rotzoll, Scot K. Izuka, Gwen A. Jacobs
Hawai‘i Groundwater Recharge Tool
The Hawai‘i Groundwater Recharge Tool allows users to evaluate the potential effects of land-cover and climate changes on groundwater recharge. This website provides a baseline estimate of recharge representing recent conditions of precipitation (1978–2008 average) and land cover (2010). Users can change land cover and rainfall conditions to evaluate the effects on groundwater recharge. Results wi
Authors
Jared H. McLean, Kolja Rotzoll, Sean B. Cleaveland, Scot K. Izuka
Comparison of a simple hydrostatic and a data-intensive 3D numerical modeling method of simulating sea-level rise induced groundwater inundation for Honolulu, Hawai'i, USA
Groundwater inundation (GWI) is a particularly challenging consequence of sea-level rise (SLR), as it progressively inundates infrastructure located above and below the ground surface. Paths of flooding by GWI differ from other types of SLR flooding (i.e., wave overwash, storm-drain backflow) such that it is more difficult to mitigate, and thus requires a separate set of highly innovative adaptati
Authors
Shellie Habel, Charles H. Fletcher, Kolja Rotzoll, Aly I. El-Kadi, Delwyn S. Oki