2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

6/05/2017 | 9:45 AM - 10:00 AM | HYDROLOGIC GEOMETRY OF THE HYPORHEIC ZONE | 302B

HYDROLOGIC GEOMETRY OF THE HYPORHEIC ZONE

Expansive hyporheic zones often govern the transient storage dynamics of gravel-bedded rivers. The residence time distribution (RTD) of transient storage (TS) is a probability distribution function describing the likelihood that a water molecule entering TS at time 0 will exit from TS at some future time, t. The RTD follows a power law across time scales from seconds to years. To create a quantitative conceptual model of hyporheic hydrology and associated TS, we partition the hyporheic zone into multiple TS zones defined by hyporheic water age (time since entering the hyporheic zone). The distribution of hydrologic storage and exchange rates among the multiple hyporheic TS zones is described by the power-law exponent and total volume of the hyporheic zone. By calculating the flux rates, volumes, and flow-path lengths associated with each hyporheic TS zone, we provide both a concrete basis for conceptualizing water storage and flux within the hyporheic zone, as well as the mathematical foundation for scalable simulation of hyporheic hydrology, water temperature, and biogeochemistry in stream networks.

C06 Large River Ecology
C36 Water Resource Management
C14 Hydroecology

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Presenters/Authors

Geoffrey Poole (), Montana State University, Montana Institute on Ecosystems, gpoole@montana.edu ;