Age dating of groundwater
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Through this work, the USGS will: Groundwater samples will be analyzed for 14 C of dissolved inorganic carbon. An attempt will be made to characterize recharge and climate for a range of hydrologic and climatic conditions. GWRP supports efforts to evaluate the use of groundwater age data to improve our overall understanding of recharge and thereby improve groundwater age dating studies through the following activities: Synthesis of Existing Data Existing age data will be used to develop a hierarchical classification scheme for defining the timescale of recharge in the Principal Aquifers of the United States.
GWRP supports efforts to evaluate the use of groundwater age data to improve our overall understanding of recharge and thereby improve groundwater availability studies namibia dating singles the following activities:.
Tracers of modern recharge: Characterization of climatic conditions associated with age distributions may provide a baseline for understanding how recharge might change in response to future climate scenarios. Groundwater samples will be collected and analyzed to fill important data gaps in existing groundwater availability studies and to demonstrate age-dating techniques that could be used in future studies to understand recharge conditions.
However, recharge estimates are an important component of water budgets developed to accurately assess groundwater availability. GWRP supports applied research into the use of groundwater age information to improve our understanding of recharge in Principal Aquifers.
USGS Groundwater Watch
This project began in early and will run through late Groundwater recharge is often difficult to quantify because of its spatial and temporal variability and because of the challenges of measuring it directly. Publication s McMahon, P. Use of groundwater ages to develop recharge estimates to constrain other recharge estimation methods.
Recharge estimates will be made using applicable groundwater age distributions and simple lumped-parameter models where appropriate. Collection of New Data Groundwater samples will be collected and analyzed to fill important data gaps in existing groundwater availability studies and to demonstrate age-dating techniques that could be used in future studies to understand recharge conditions.
Hydrogeology Journal, DOI robin dating raven Department of the Interior U. Use of groundwater ages to define timescales for recharge processes that could be used as an indicator of aquifer sustainability. For more information about this project, contact: This project will focus on synthesis of existing data and collection of new data for two general categories of recharge:. Climatic conditions will be characterized for time periods defined by the age distributions.
McMahonResearch Hydrologist x