Groundwater
Groundwater
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Surface-water extent in the Klamath Marsh
Satellite imagery and the interplay of climate and hydrologic data tell the story of surface-water decline in the Klamath Marsh.
Nutrient Loading and Coral Health at Ofu, American Samoa
Declining water quality poses a significant and persistent threat to coral reefs worldwide, contributing to their widespread degradation. Identifying the specific impacts of water quality stressors is challenging due to the complex interplay of various physical and biological factors affecting reef health. Submarine groundwater discharge (SGD) plays a crucial role in transporting nutrients into...
Recharge to the Columbia River Basalt Groundwater System
Learn about the groundwater flow system within the Columbia River Basalt Group in the Umatilla River Basin.
Estimating Groundwater Budgets for Oregon
Scientists Stephen Gingerich and Adel Haj, Jr. are leading efforts to estimate groundwater budgets across the state. Water hidden beneath the earth’s surface is a vital resource and quantifying its availability is crucial for long-term management. USGS scientists are collaborating with scientists at the Oregon Water Resources Department to gain a better understanding of this valuable resource.