Graduation Year

2018

Date of Thesis Acceptance

Spring 5-8-2018

Major Department or Program

Chemistry - Geology

Advisor(s)

Kevin Pogue; Nate Boland

Abstract

In combination with a saline tracer, temporal Electrical Resistivity Imaging (ERI) is an effective tool to analyze the structure of the hyporheic zone. A saline solution was added to the streambed upstream of a J-hook rock vane in a fine-grained stream (Cow Creek, Stillwater, OK) in order to assess the effect of an in-stream rehabilitation structure on hyporheic flow. Three transects were employed, one longitudinal and two transverse, across and downstream of the J-hook. Wells were used to monitor electrical conductivity of the hyporheic zone. The results indicate that the in-stream rehabilitation structures promote and increase hyporheic flow, even streams with fine-grained sediments. Furthermore, hyporheic zones in fine-grained sediments are as active as those in coarse-grained systems. In the temporal ER data, a flow path exists beneath the J-hook; this is evident in all three datasets. A possible effect from hyporheic flow through fine sediments could be increased pollutant retention, due to the ease of surface water pollutants permeating low-K zones beneath these streambeds.

Page Count

30

Subject Headings

River channels‚ Hyporheic zones‚ Imaging systems -- Electrical Resistivity Imaging (ERI)‚ Sediments (Geology) -- Fine-grained‚ Blades -- J-hook rock vane‚ Stream restoration‚ Permeability‚ Pollutants‚ Science‚ Stillwater (Okla.) -- Cow Creek‚ Whitman College 2018 -- Dissertation collection -- Chemistry-Geology

Permanent URL

http://works.whitman.edu/408

Document Type

Public Accessible Thesis

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