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Pacific Islands Water Science Center

The USGS Pacific Islands Water Science Center conducts hydrologic monitoring and investigative studies on a wide variety of issues affecting water resources in the State of Hawaiʻi and the U.S. Affiliated Pacific Islands.

News

Community Meeting for Reimagining Molokaʻi's Wetlands

Community Meeting for Reimagining Molokaʻi's Wetlands

USGS Unveils Mobile Flood Tool for the Nation

USGS Unveils Mobile Flood Tool for the Nation

Adaptive management strategies for potential impacts of climate change on Guam

Adaptive management strategies for potential impacts of climate change on Guam

Publications

Correlation analysis of groundwater and hydrologic data, Kaloko-Honokōhau National Historical Park, Hawai‘i

Designated in 1978, Kaloko-Honokōhau National Historical Park is located on the west coast of the Island of Hawaiʻi. The Kaloko-Honokōhau National Historical Park encompasses about 1,200 acres of coastal land and nearshore ecosystems, which include wetlands, anchialine pools (landlocked bodies of brackish water with hydrologic connections to the ocean), fishponds, a fishtrap, and coral reefs. Thes
Authors
Brytne K. Okuhata, Delwyn S. Oki

Pesticides in surface water downstream of and near agricultural and developed land in Hawai‘i, 2015–19

Pesticides and pesticide degradates (herein referred to as pesticides) in surface water were assessed at 78 sites on 4 Hawaiian Islands (Kauaʻi, Oʻahu, Maui, and Island of Hawaiʻi) during 2015–19. Each site was downstream of or near agricultural land, developed land, or both. Most (58) sites were streams; the remaining sites were canals, ditches, anchialine pools, coastal ponds, and the nearshore
Authors
Adam G. Johnson, Joseph J. Kennedy, David A. Alvarez

Groundwater and surface-water interactions in the Lower Duwamish Waterway, Seattle, Washington

The U.S. Geological Survey (USGS), in cooperation with the Washington State Department of Ecology (Ecology), conducted a study to describe the current understanding of the regional groundwater system of the lower Duwamish River valley and groundwater and surface-water interactions in the lower Duwamish Waterway. The lower Duwamish Waterway is the final 5-mile (mi) reach of the Duwamish River befor
Authors
Jackson N. Mitchell, Kathleen E. Conn

Science

Groundwater Availability on the Island of Saipan, CNMI

Most of the public water supply on Saipan comes from wells that tap groundwater from the island’s aquifers. The island is small, so the amount of groundwater available is limited. The aquifers also contain saltwater from the ocean, so wells may yield salty water if pumping is excessive, the wells are clustered together, or if droughts cause a reduction in natural groundwater recharge. The USGS...
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Groundwater Availability on the Island of Saipan, CNMI

Most of the public water supply on Saipan comes from wells that tap groundwater from the island’s aquifers. The island is small, so the amount of groundwater available is limited. The aquifers also contain saltwater from the ocean, so wells may yield salty water if pumping is excessive, the wells are clustered together, or if droughts cause a reduction in natural groundwater recharge. The USGS...
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Effects of Drought and Cloud-Water Interception on Wildfire Hazard in Hawaiʻi

Understanding the effects of drought and cloud-water interception on wildfire hazard is critical to Hawai‘i’s water-resource managers, farmers, ranchers, and forest, watershed, and wildfire managers for developing adaptive management strategies. Identifying areas of increased wildfire hazard is also important for developing strategic monitoring programs to help assess and predict the effects of...
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Effects of Drought and Cloud-Water Interception on Wildfire Hazard in Hawaiʻi

Understanding the effects of drought and cloud-water interception on wildfire hazard is critical to Hawai‘i’s water-resource managers, farmers, ranchers, and forest, watershed, and wildfire managers for developing adaptive management strategies. Identifying areas of increased wildfire hazard is also important for developing strategic monitoring programs to help assess and predict the effects of...
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Groundwater Recharge in Hawaiʻi

Groundwater provides 99 percent of Hawai‘i’s drinking water and about 50 percent of all freshwater used in the State. Groundwater recharge is water derived from precipitation and other sources, such as irrigation and leakage from surface reservoirs, that moves through or bypasses the plant-soil system and replenishes aquifers. Groundwater availability in Hawai‘i is affected by changes in...
link

Groundwater Recharge in Hawaiʻi

Groundwater provides 99 percent of Hawai‘i’s drinking water and about 50 percent of all freshwater used in the State. Groundwater recharge is water derived from precipitation and other sources, such as irrigation and leakage from surface reservoirs, that moves through or bypasses the plant-soil system and replenishes aquifers. Groundwater availability in Hawai‘i is affected by changes in...
Learn More
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