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|Title:||Lake Dardanelle, Arkansas River : hydraulic model investigation|
|Authors:||United States. Army. Corps of Engineers. Little Rock District.|
Foster, James E. (James Edward), 1925-
Franco, John J.
River training structures
|Publisher:||Hydraulics Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Technical report (U.S. Army Engineer Waterways Experiment Station) ; H-77-4.|
Abstract: Lake Dardanelle is a 51-mile-long reservoir formed by Dardanelle Lock and Dam which is located at mile 205.5 on the Arkansas River. The lake was designed to provide head for power, depth for navigation, and a trap for a considerable volume of sediment. The river was realigned and stabilized in the portion of the lake upstream of mile 238.4 with plans for progressive improvement of the reach downstream as deposition and channel development indicated the need for such improvements. Water was impounded in 1964; and by 1972, deposition had accumulated in the vicinity of Horse Head Creek such that it was beginning to hinder navigation. This study was conducted to determine the type and location of training and stabilization structures needed to develop a satisfactory navigation channel downstream of mile 238.4 and to provide a satisfactory channel approaching the navigation span of the proposed highway bridge at mile 234.9. A movable-bed model reproduced the reach of the Arkansas River and adjacent overbank area from mile 238.5 to 231.3 to scales of 1:120 horizontally and 1:80 vertically. Results of this investigation indicated that : a plan could be developed that would provide a satisfactory crossing toward the left bank and in the approaches to the proposed bridge. Navigation gaps could be used in the two closure dikes across the channel along the right bank during construction and development of the crossing. Some shoaling could be expected in the upstream approaches to the gaps and some scouring could be expected just downstream of the gaps. Development of a channel along the left bank upstream of the proposed bridge would reduce the tendency for erosion of the left bank in the upper portion of the bend downstream of the bridge. Permitting a portion of the left bank near the lower end of the bend below the bridge to erode would tend to improve the alignment of the channel over the crossing toward the right bank.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Technical Report|
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|TR-HL-77-4.pdf||8.69 MB||Adobe PDF|