Sanford et al. dissolved gas tracer method

Knowledge graph centered on Sanford et al. dissolved gas tracer method with 74 nodes and 213 connections. Top connected: groundwater storage dynamics, evapotranspiration, East River, streamflow, weathering.

Method synopsis

Sampling of 3H and 4He environmental tracers from screened groundwater wells to constrain groundwater age distributions and validate numerical model predictions of mixing between modern and pre-modern groundwater.

Synthesized from method descriptions across 5 papers using this protocol.

Procedure from a recent peer-reviewed implementation

Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — Matrix diffusion controls mountain hillslope groundwater ages and inferred storage dynamics (2025), Groundwater. Implementations in other papers (listed below) may differ.

1. Sample environmental tracers from groundwater wells
   Environmental tracer observations were sampled from PLM1 and PLM6 wells in May 2021. PLM1 is located upslope at 10m below land surface, PLM6 is at the toe of hillslope and finished at 10m below land surface. Both wells are screened over the bottom ~2m and finished within fractured shale bedrock.
   Quantities: 2 wells sampled (PLM1 and PLM6), both screened over bottom ~2m, both 10m deepDuration: Single sampling event in May 2021Conditions: Wells located within fractured shale bedrock on steep mountain hillslope
   Equipment: groundwater wells, environmental tracer sampling equipment

Typical Equipment

• groundwater wells
• environmental tracer sampling equipment

Output Measurements

• 3H concentrations
• 4He concentrations
• groundwater age constraints

Papers Using This Protocol (5)

Species Studied With This Protocol

Places Where Used