Hydraulic Conductivity

Paper Summary:

This paper provides an overview of hydraulic conductivity, how it is measured, and why it is important for transient storage. A review of current issues in hydraulic conductivity is followed by a summary of the research in the conclusion.

From the Paper:

" In 2003, Thomas, Valetta, Webster and Mulholland (2003), reported they had developed the Regression Partitioning Method (RPM) for estimating the proportion of reactive solute uptake occurring within transient storage zones of streams. "The RPM is a technique for analyzing solute addition data in which whole stream uptake (mg m 2 d 1) is determined from the longitudinal pattern in plateau tracer concentrations. At one location, a time series of samples are collected that define the 'rising limb' of the solute breakthrough curve" (Thomas et al. 965). These researcher estimated the y-intercept by regressing a measure of reactive tracer availability (e.g., NO3-15N:Cl ratio) as well as the percentage of tracer that has resided within, and returned from, the transient storage zone (i.e. hyporheic zone), which was then used to predict channel-specific NO3 uptake rates. The uptake within the transient storage zone of stream-derived material was calculated by difference."

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