Geological Society of America

T59 Measuring and Modeling Fluxes across the Surface Water/Groundwater Interface II

Sunday, 4 November 2018
1:30 PM - 5:30 PM
Room 132

HOW DO HYDROLOGIC FORCING AND GEOLOGIC SETTING CONTROL RIVER CORRIDOR EXCHANGE IN A 5TH ORDER MOUNTAIN STREAM NETWORK?

Paper number: T59-2
Program: Technical Sessions
Time: 1:35 PM – 1:50 PM

Authors

Adam S. Ward Presenting Author
Indiana University, Bloomington, IN
Stefan Krause
University of Birmingham, Birmingham
Marie J. Kurz
Patrick Center for Environmental Research, Philadelphia, PA
Angang Li
Northwestern University, Evanston, IL
Eugenia Marti
CEAB-CSIC, Girona
Melinda Miller
Indiana University, Bloomington, IN
Alexander Milner
University of Birmingham, Birmingham
Kerry Neil
Indiana University, Bloomington, IN
Stephen Plont
Virginia Tech, Blacksburg, VA
Kevin Roche
Notre Dame University, South Bend, IN
A.I. Packman
Evanston, IL
Skuyler Herzog
Indiana University, Bloomington, IN
Nathan Wisnoski
Indiana University, Bloomington, IN
Jay Zarnetske
Michigan State University, East Lansing, MI
Steven M. Wondzell
U.S. Forest Service, Olympia, WA
Noah Schmadel
National Center, Reston, VA
Phillip Blaen
University of Birmingham, Birmingham
J. Drummond
Evanston, IL
David M. Hannah
University of Birmingham, Birmingham
Ciaran J. Harman
Johns Hopkins University, Baltimore, MD
Julia Knapp
Center for Applied Geoscience, Tuebingen

Abstract

It is recognized that exchange of water, energy, and solutes between streams and their valley bottoms are controlled by hydrologic forcing interacting with the local geomorphic setting. Despite a host of field studies conducted at the reach scale, we have little predictive power at the scale of river networks. For example, discharge has been reported to increase, decrease, and have no impact on river corridor exchange based on stream solute tracer studies. It is logical to represent hydrologic forcing based on discharge, which reflects storm and seasonal responses. Similarly, remotely sensed characteristics of geologic setting (e.g., river corridor slope, sinuosity) are a promising basis for explaining river corridor exchange along networks. However, the spatiotemporal relationships linking discharge to geologic setting remain unknown. In this study, we endeavor to predict river corridor exchange as a function of (1) discharge variation at a fixed location; (2) discharge variation as a function of drainage area during a fixed baseflow condition; and (3) local geomorphic setting. To achieve these predictions, we present more than 60 solute tracer studies conducted in the 5^th order basin of the H.J. Andrews Experimental Forest (Oregon, USA).

Geological Society of America Abstracts with Programs. Vol. 50, No. 6

doi: 10.1130/abs/2018AM-323260

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