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A three-dimensional, groundwater model (SUTRA) was developed to understand the effects of seawater washover on the freshwater lens of Roi-Namur, Kwajalein Atoll, Republic of the Marshall Islands. The model was calibrated by using observation data collected from 1990 through 1991 and 2008 through 2010. This USGS data release contains all of the input and output files for the simulations described in the associated journal article "Seawater-flooding events and impact on freshwater lenses of low-lying islands: controlling factors, basic management and mitigation" by Stephen B. Gingerich, Clifford I. Voss, and Adam G. Johnson, Journal of Hydrology (https://doi.org/10.1016/j.jhydrol.2017.03.001). This data release also...
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Time series data of water surface elevation and wave height were acquired at ten locations for 518 days (in three separate deployments) off the south coast of Kwajalein Island, Marshall Islands, in support of a study on the coastal circulation patterns and the transformation of surface waves over the coral reefs. The relative placement of sensors on the reefs were as follows: KWA13W1 and KWA13E1 – fore reef KWA13W2 and KWA13E2 – outer reef flat KWA13W1 and KWA13E1 – middle reef flat KWA13W1 and KWA13E1 – inner reef flat
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The zipped folder (Monthly_water_budget_Roi-Namur_2000-12.zip) associated with this metadata file contains 156 polygon shapefiles. Collectively, the 156 shapefiles contain spatially distributed estimates of groundwater recharge and other water-budget components, in inches, for Roi-Namur, Kwajalein Atoll, Republic of the Marshall Islands, for each month and year during 2000–12. The name of each shapefile indicates the year and month of the water-budget components contained in the shapefile. The month-year estimates of recharge and other water-budget components summarized in each shapefile were summed from daily water-budget components that were computed using a water-budget model. The equations of the water-budget...
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Projected future wave-driven flooding depths on Roi-Namur Island on Kwajalein Atoll in the Republic of the Marshall Islands for a range of climate-change scenarios. This study utilized field data to calibrate oceanographic and hydrogeologic models, which were then used with climate-change and sea-level rise projections to explore the effects of sea-level rise and wave-driven flooding on atoll islands and their freshwater resources. The overall objective of this effort, due to the large uncertainty in future emissions (and thus climate change scenarios) that is largely irreducible, was to reduce risk and increase island resiliency by providing model simulations across a range of plausible future conditions. This...


    map background search result map search result map Kwajalein Island, Marshall Islands, wave and water level data, 2013-2015 SUTRA model used to evaluate the freshwater flow system on Roi-Namur, Kwajalein Atoll, Republic of the Marshall Islands Monthly Water-Budget Components for Roi-Namur, Kwajalein Atoll, Republic of the Marshall Islands, 2000-12 Kwajalein Island, Marshall Islands, wave and water level data, 2013-2015 Monthly Water-Budget Components for Roi-Namur, Kwajalein Atoll, Republic of the Marshall Islands, 2000-12 SUTRA model used to evaluate the freshwater flow system on Roi-Namur, Kwajalein Atoll, Republic of the Marshall Islands