Pacific Islands Water Science Center

Publications

Publications from the Pacific Islands Water Science Center are geographically grouped.

Search the USGS Pubs Warehouse for products written for the general public and scientists.

Filter Total Items: 164
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Year Published: 2010

Changes of freshwater-lens thickness in basaltic island aquifers overlain by thick coastal sediments

Freshwater-lens thickness and long-term changes in freshwater volume in coastal aquifers are commonly assessed through repeated measurement of salinity profiles from monitor wells that penetrate into underlying salt water. In Hawaii, the thickest measured freshwater lens is currently 262 m in dike-free, volcanic-rock aquifers that are overlain by...

Rotzoll, Kolja; Oki, Delwyn S.; El-Kadi, Aly I.
Changes of freshwater-lens thickness in basaltic island aquifers overlain by thick coastal sediments; 2010; Article; Journal; Hydrogeology Journal; Rotzoll, Kolja ; Oki, Delwyn S.; El-Kadi, Aly I.

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Year Published: 2010

Effects of groundwater withdrawal on borehole flow and salinity measured in deep monitor wells in Hawai'i-implications for groundwater management

Water-resource managers in Hawai`i rely heavily on salinity profiles from deep monitor wells to estimate the thickness of freshwater and the depth to the midpoint of the transition zone between freshwater and saltwater in freshwater-lens systems. The deep monitor wells are typically open boreholes below the water table and extend hundreds of feet...

Rotzoll, Kolja
Effects of groundwater withdrawal on borehole flow and salinity measured in deep monitor wells in Hawai'i-implications for groundwater management; 2010; SIR; 2010-5058; Rotzoll, Kolja

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Year Published: 2010

Groundwater availability study for Guam; goals, approach, products, and schedule of activities

An expected significant population increase on Guam has raised concern about the sustainability of groundwater resources. In response, the U.S. Geological Survey (USGS), in collaboration with the University of Guam's Water and Environmental Research Institute of the Western Pacific (WERI) and with funding from the U.S. Marine Corps (USMC), is...

Gingerich, Stephen B.; Jenson, John W.
Groundwater availability study for Guam; goals, approach, products, and schedule of activities; 2010; FS; 2010-3084; Gingerich, Stephen B.; Jenson, John W.

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Year Published: 2010

Groundwater resources of Mosteiros basin, island of Fogo, Cape Verde, West Africa

Groundwater resources in Cape Verde provide water for agriculture, industry, and human consumption. These resources are limited and susceptible to contamination. Additional groundwater resources are needed for continued agricultural development, particularly during times of drought, but increased use and (or) climatic change may have adverse...

Heilweil, Victor M.; Gingerich, Stephen B.; Plummer, Niel; Verstraeten, Ingrid M.
Groundwater Resources of Mosteiros Basin, Island of Fogo, Cape Verde, West Africa; 2010; FS; 2010-3069; Heilweil, Victor M.; Gingerich, Stephen B.; Plummer, L. Niel; Verstraeten, Ingrid M.

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Year Published: 2010

Groundwater resources of Ribeira Fajã basin, island of São Nicolau, Cape Verde, West Africa

Groundwater resources in Cape Verde provide water for agriculture, industry, and human consumption. These resources are limited and susceptible to contamination. Additional groundwater resources are needed for continued agricultural development, particularly during times of drought, but increased use and (or) climatic change may have adverse...

Heilweil, Victor M.; Gingerich, Stephen B.; Plummer, Niel; Verstraeten, Ingrid M.
Groundwater Resources of Ribeira Faja Basin, Island of Sao Nicolau, Cape Verde, West Africa; 2010; FS; 2010-3071; Heilweil, Victor M.; Gingerich, Stephen B.; Plummer, L. Niel; Verstraeten, Ingrid M.

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Year Published: 2010

Groundwater resources of Ribeira Paúl basin, island of Santo Antão, Cape Verde, West Africa

Groundwater resources in Cape Verde provide water for agriculture, industry, and human consumption. These resources are limited and susceptible to contamination. Additional groundwater resources are needed for continued agricultural development, particularly during times of drought, but increased use and (or) climatic change may have adverse...

Heilweil, Victor M.; Gingerich, Stephen B.; Verstraeten, Ingrid M.
Groundwater Resources of Ribeira Paul Basin, Island of Santo Antao, Cape Verde, West Africa; 2010; FS; 2010-3070; Heilweil, Victor M.; Gingerich, Stephen B.; Verstraeten, Ingrid M.

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Year Published: 2010

Streamflow, suspended-sediment, and soil-erosion data from Kaulana and Hakioawa watersheds, Kaho'olawe, Hawai'i,

Various events over the last two centuries have destroyed the vegetation and caused rapid soil erosion on large areas of the small, arid, windy tropical shield-volcano island of Kaho`olawe, Hawai`i. These activities were largely halted in the 1990s, and efforts have been made to restore the island's vegetation in order to stem erosion. In 2003,...

Izuka, Scot K.; Abbott, Lyman L.
Streamflow, suspended-sediment, and soil-erosion data from Kaulana and Hakioawa watersheds, Kaho'olawe, Hawai'i,; 2010; OFR; 2010-1182; Izuka, Scot K.; Abbott, Lyman L.

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Year Published: 2010

Hawaii StreamStats; a web application for defining drainage-basin characteristics and estimating peak-streamflow statistics

Reliable estimates of the magnitude and frequency of floods are necessary for the safe and efficient design of roads, bridges, water-conveyance structures, and flood-control projects and for the management of flood plains and flood-prone areas. StreamStats provides a simple, fast, and reproducible method to define drainage-basin characteristics...

Rosa, Sarah N.; Oki, Delwyn S.
Hawaii StreamStats; a web application for defining drainage-basin characteristics and estimating peak-streamflow statistics; 2010; FS; 2010-3052; Rosa, Sarah N.; Oki, Delwyn S.

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Year Published: 2010

Terrigenous sediment provenance from geochemical tracers, south Molokai reef flat, Hawaii

Land-derived runoff is one of the greatest threats to coral-reef health. Identification of runoff sources is an important step in erosion mitigation efforts. A geochemical sediment provenance study was done in uplands and across the adjacent fringing reef on the southeast shore of Molokai, Hawaii, to determine whether sediment runoff originated...

Takesue, R.K.
Terrigenous sediment provenance from geochemical tracers, south Molokai reef flat, Hawaii; 2010; OFR; 2010-1155; Takesue, R. K.

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Year Published: 2010

Rainfall, discharge, and water-quality data during stormwater monitoring, H-1 storm drain, Oahu, Hawaii, July 1, 2009, to June 30, 2010

Storm runoff water-quality samples were collected as part of the State of Hawaii Department of Transportation Stormwater Monitoring Program. The program is designed to assess the effects of highway runoff and urban runoff collected by the H-1 storm drain on the Manoa-Palolo Drainage Canal. This report summarizes rainfall, discharge, and water-...

Presley, Todd K.; Jamison, Marcael T.J.
Rainfall, discharge, and water-quality data during stormwater monitoring, H-1 storm drain, Oahu, Hawaii, July 1, 2009, to June 30, 2010; 2010; OFR; 2010-1161; Presley, Todd K.; Jamison, Marcael T. J.

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Year Published: 2010

Flood-Frequency Estimates for Streams on Kaua`i, O`ahu, Moloka`i, Maui, and Hawai`i, State of Hawai`i

This study provides an updated analysis of the magnitude and frequency of peak stream discharges in Hawai`i. Annual peak-discharge data collected by the U.S. Geological Survey during and before water year 2008 (ending September 30, 2008) at stream-gaging stations were analyzed. The existing generalized-skew value for the State of Hawai`i was...

Oki, Delwyn S.; Rosa, Sarah N.; Yeung, Chiu W.
Flood-Frequency Estimates for Streams on Kaua`i, O`ahu, Moloka`i, Maui, and Hawai`i, State of Hawai`i; 2010; SIR; 2010-5035; Oki, Delwyn S.; Rosa, Sarah N.; Yeung, Chiu W.

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Year Published: 2010

Effects of Surface-Water Diversion on Streamflow, Recharge, Physical Habitat, and Temperature, Na Wai `Eha, Maui, Hawai`i

The perennial flow provided by Waihe‘e River, Waiehu Stream, ‘Īao Stream, and Waikapū Stream, collectively known as Nā Wai ‘Ehā (“The Four Streams”), made it possible for widespread agricultural activities to flourish in the eastern part of West Maui, Hawai‘i. The streams of the Nā...

Oki, Delwyn S.; Wolff, Reuben H.; Perreault, Jeff A.
Effects of Surface-Water Diversion on Streamflow, Recharge, Physical Habitat, and Temperature, Na Wai `Eha, Maui, Hawai`i; 2010; SIR; 2010-5011; Oki, Delwyn S.; Wolff, Reuben H.; Perreault, Jeff A.