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Seminar

MS Thesis Defense - Wilhelm Fraundorfer

Investigating Mechansims of Hydraulic Conductivity Transience in Sandy Streambeds

Date:
Time:
12:00 pm
Hardin Hall Room: 901
3310 Holdrege St
Lincoln NE 68583
Additional Info: HARH
Contact:
Jesse Korus, jkorus3@unl.edu
This research utilized a time series of hydraulic, geophysical, and sedimentological data to
differentiate between streambed processes that give rise to hydraulic conductivity (K) heterogeneity
in streambed sediments. Most research on streambed K has focused on characterizing spatial
heterogeneity, this study is unique in its focus on temporal variability and for integrating methods
from multiple disciplines. This work has potential implications for hyporheic processes, as well as
more traditional applications in hydrology and geomorphology. Permeameters and slug tests were
used to densely sample K in a grid on the Loup River in East-central Nebraska between June and
August of 2017. K did not change significantly between June and July, but did between July and
August in response to an anthropogenic high flow event. This study’s results suggest that depositional
and erosional processes may play a less significant role in shaping streambed K heterogeneity than
has been suggested by some researchers.

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