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Hydrology and Hyporheic Studies 2021

Stream guages were set up in the HJ Andrews Experimental Forest as early as 1949 (see more at dataset HF004) as part of a larger paired, gaged watershed study to detect changes in streamflow due to watershed treatments. Data continue to be collected on streamflow and stream chemistry from the gage. Sediment data from the stream is measured periodically to assess load and accumulation. Through decades of data from these Experimental Watersheds and Gauging Stations researchers are learning about water quantity, water chemistry, and water sediment as the forests around the streams change with time due to growth and disturbances such as harvest, wildfire, floods, and landslides. 

In a separate study about water and the flow of water, researchers are measuring how water moves into and out of the hyporheic zone of streams. The hyporheic zone is the area of sediment under and around a stream bed where water mixes from the soil into the stream area. The research of the hyporheic zone at the HJ Andrews Experimental Forest builds on decades of past research that has taken place in WS01 and extends our knowledge of what drives hyporheic exchange in mountain streams.

USFS Intern Araceli Morales-Santos at gage house of Watershed 9 (WS09) in the HJ Andrews Experimental Forest
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_001

USFS Intern Araceli Morales-Santos puts leaf guard on v-notch weir at WS09 stream gage
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_002

USFS Intern Araceli Morales-Santos puts leaf guard on v-notch weir at WS09 stream gage
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_003

USFS Intern Araceli Morales-Santos measures water stage at the v-notch weir at WS09 stream gage
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_004

USFS Intern Araceli Morales-Santos at the v-notch weir at WS09 stream gage
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_005

USFS Intern Araceli Morales-Santos measures water stage at the v-notch weir at WS09 stream gage
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_006

Stream channel of WS09 just above the stream gage, a year after the 2020 Holiday Farm Fire
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_007

USFS Intern Araceli Morales-Santos at the stilling well at WS09 stream gage
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_008

Ruler for manual checks of stage height in stilling well at a stream gage
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_009

USFS Intern Araceli Morales-Santos at WS09 gage house one year after 2020 fire in the HJ Andrews Experimental Forest
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_010

USFS Intern Araceli Morales-Santos at WS09 gage house one year after 2020 fire in the HJ Andrews Experimental Forest
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_011

The sediment basin dam at WS09 was rebuilt after it burned in the 2020 Holiday Farm fire
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_012

USFS Intern Araceli Morales-Santos at WS09 gage house one year after 2020 fire in the HJ Andrews Experimental Forest
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_013

Oregon State University graduate student, Paige Becker, walks to her field study site in Watershed 01, a year after the 2020 Holiday Farm fire burned through
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_014

Oregon State University graduate student, Paige Becker, walks to her field study site in Watershed 01, a year after the 2020 Holiday Farm fire burned through
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_015

Oregon State University graduate student, Paige Becker, walks to her field study site in Watershed 01, a year after the 2020 Holiday Farm fire burned through
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_016

Salt measured out for a tracer study in the stream in Watershed 01. The salt tracer is used to measure how long it takes for water to move down the stream bed
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_017

Oregon State University graduate student, Paige Becker, preparing a fluorescent tracer (also known as uranine) used to measure flow rates in streams.
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_018

A fluorescent tracer (uranine) used to measure flow rates in streams.
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_019

Oregon State University graduate student, Paige Becker, preparing a fluorescent tracer used to measure flow rates in streams.
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_020

Oregon State University graduate student, Paige Becker, using a meter to quantify concentrations of tracers in the stream
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_021

A sensor for measuring concentration of fluorescent tracers in stream water.
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_022

Oregon State University graduate student, Paige Becker, using a sensor to quantify concentrations of tracers in the stream
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_023

Oregon State University graduate student, Paige Becker, using a sensor to quantify concentrations of tracers in the stream
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_024

Oregon State University graduate student, Paige Becker, working in the stream in Watershed 01
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_025

A sensor for measuring water constituents in the stream.
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_026

Oregon State University graduate student, Paige Becker, near the stream in Watershed 01
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_027

Paige Becker with tubing used in her tracer experiments
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_028

Tubing and fluorescent tracer used in tracer studies of residence time of water in streams
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_029

Oregon State University graduate student, Paige Becker, preparing a salt tracer experiment in the stream in Watershed 01
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_030

Oregon State University graduate student, Paige Becker, conducting experiments in Watershed 01
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_031

Oregon State University graduate student, Paige Becker, conducting experiments in Watershed 01
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_032

Oregon State University graduate student, Paige Becker, walks to her field study site in Watershed 01, a year after the 2020 Holiday Farm fire burned through
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_033

Oregon State University graduate student, Paige Becker, walks to her field study site in Watershed 01, a year after the 2020 Holiday Farm fire burned through
Photographed by: Lina DiGregorio
Date: 8/18/2021
Photo number: aey_034