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Person

Andrew J Long

Hydrologist

Washington Water Science Center

Email: ajlong@usgs.gov
Office Phone: 253-552-1660
Fax: 253-552-1581
ORCID: 0000-0001-7385-8081

Location
934 Broadway
Suite 300
Tacoma , WA 98402
US

Supervisor: Richard S Dinicola
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Water used for hydraulic fracturing treatments in and near the Williston Basin during 2000-2015, was estimated using data reported in IHS Markit (TM) (2016). Hydraulic fracturing treatment data from IHS Markit (TM) (2016) may include volumes in a variety of measurement units, and they may include multiple treatments per well. All listed treatments within the study area were converted to gallons and summed on a per-well basis, discounting any treatments for which the specified measurement units were unclear (for example, “sacks”, or “feet”), which were minor. Of 3,734,380 treatments listed within the study area during the timeframe of interest, 0.7% (26,373 records) were not included. For each well, the date listed...
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Human-driven climate change presents natural resource managers with great uncertainties. Planning and executing effective management in the face of these uncertainties requires approaches nimble enough to address a broad range of interacting factors yet scientifically rigorous enough to support decisions and actions when faced with public scrutiny. Complex interactions among management practices and climate further stymie managers trying to plan for the future. Wind Cave National Park epitomizes this complexity hydrologically with its karst geology, sinking streams, and cave lakes, and ecologically with its prairie-forest ecotonal vegetation, large ungulate herds, and prescribed and wild fires. This project partnered...
Categories: Project
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In this project researchers are assessing the links between climate, groundwater storage, spring flow, and ecosystem response in two contrasting major U.S. karst systems: the Edwards and Madison aquifers. Karst aquifers are uniquely suited for investigating effects of climate variability at timescales of human interest because they are highly dynamic; further, many provide habitat for rare and endangered species. The principal objective of this project is to determine how interrelations between karst hydrology and ecosystems will be affected by climate change. Current relations between recharge (impulse) and storage and spring flow (response) are quantified through signal-processing models that use existing...
Categories: Project
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