Date of Graduation

Spring 2017

Degree

Master of Science, Geospatial Sciences in Geography, Geology, and Planning

Department

Geography, Geology, and Planning

Committee Chair

Matthew Pierson

Keywords

sedimentation, riffle, model, lead, survey, HEC-RAS, flood, erosion, remediation

Subject Categories

Sedimentology | Water Resource Management

Abstract

Sediment transport and deposition in river channels can vary for many reasons including flooding, dredging, channel velocity, and grain size. On the Big River, the Army Corps of Engineers constructed a riffle ramp structure to trap and remediate lead-contaminated sediments. The performance of the structure is unknown. The goal of this study is to evaluate the storage capabilities of the riffle structure. To do this, survey data was collected to analyze sediment storage and entered into the HEC-RAS 5.0 to model the hydraulics of the channel before and after the riffle installation. Samples were collected to assess the level of lead contamination. The results indicate the riffle structure has caused the deposition of approximately 61,898 ft3 of sediment.

Copyright

© Nichole Renee Weedman

Open Access

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