Channel bed degradation in major Oklahoma Streams volume I of IV : Arkansas River.
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2007-12-01
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Alternative Title:Channel bed degradation in major Oklahoma Streams : Arkansas River
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Edition:Final report.
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Abstract:The purpose of this research is to analyze the flowline data and relate it to the degradation of the
river bed at bridge locations in the river. This information may then be used to replace or rehabilitate
those bridges that experienced severe degradation.
This report evaluates channel degradation in 252-mile reach of Arkansas River in Oklahoma. In
this study, the 252 mile river length is divided into two Reaches: Reach 1- Kaw Lake to Keystone Dam,
and Reach 2- Keystone Dam to Webbers Falls Dam. The flowlines of Arkansas River in Oklahoma were
observed for a long-term period. In Reach-1, river station (RS) 3 shows the maximum degradation of 3
feet in 30 years from 1963 to 1993. Similarly, in Reach-2, RS 16, located 7 miles downstream of
Webbers Falls Dam shows the maximum degradation of 12 feet in 28 years. On the other hand, channel
aggradation of 3.50 feet is observed at RS 1 in Reach-1. The study of river-bed elevation change
elucidates that the Arkansas River is not stable for 80.5 miles below Keystone Dam.
The I-40 bridge located at RS 16 (Bridge Key b17051) has experienced a degradation
degradation of 12.2 feet in 32 years. When this bridge is replaced in replacement cycle, it is recommended
that a detailed hydraulic and geotechnical analysis be performed before reconstruction.
It is recommended that degradation of tributaries is evaluated to determine the structures where
flowline is severely degrading in Arkansas River basin.
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