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Drone imagery was used to monitor changes in stream geomorphology over time. This image represents one snapshot in a time series of images taken during the summer of 2017 on the Loup River near Genoa, Nebraska. This research project investigated processes responsible for hydraulic conductivity transience in sandy rivers.
Will Fraundorfer, a master's student in the School of Natural Resources, removes a bailer from a well installed in the Loup River’s streambed. Will is measuring the hydraulic conductivity of the streambed using a technique known as a slug test. Hydraulic conductivity refers to the ease with which water moves through porous materials.
Jesse Korus, assistant professor in the School of Natural Resources, prepared to perform a Ground Penetrating Radar (GPR) survey on the Loup River. GPR can be used to image structures underground to learn about a location’s geology. In the right environments, GPR can be a useful tool for hydrologists.
Robert Clark and Alexa Davis, undergraduates in the School of Natural Resources, perform a falling head permeameter test in the Loup River. Permeameters are a simple way to quickly measure the hydraulic conductivity of streambed sediments. In this image, you can also see some of the grid that measurements were made on during this study.
Robert Clark measures the water level on the Loup River. Relative changes in water level, also called stream stage, were monitored during data collection. Stream stage can be used to estimate the volume of water flowing down a river per unit time.
Pictures courtesy of Will Fraundorfer
Assembled fiber-optic distributed temperature sensor (FO-DTS) on Gudmundsen Sandhills Research Laboratory near Whitman, NE. FO-DTS is a technique that uses fiber-optic cable deployed on a streambed to sense groundwater discharge into surface water.
Mason, graduate student in the School of Natural Resources, is securing fiber-optic cable on the streambed with cable fasteners to ensure the cable does not move with the water current.
Undergraduate student Sydney (left) and graduate students Mason (middle) and Marty (right) finish securing the cable on the streambed. Approximately 500 meters of fiber-optic cable was set on the streambed surface
This stream is located in a wet meadow valley in the center of the Sandhills of Nebraska. The photo was taken atop an outfall overlooking the Gudmundsen stream.
Showing Sydney recorded streambed temperature data from the DTS system. Next, we will look for temperature anomalies in the data to locate areas of focused groundwater upwelling.
Pictures courtesy of Mason Johnson