Navigation Conditions at Lock and Dam No. 9, Arkansas River: Hydraulic Model Investigation.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
Pagination or Media Count:
Lock and Dam No. 9, proposed for construction on the Arkansas River, will provide a navigable pool extending upstream about 25 miles to the lock and dam at Dardanelle Lock and Dam No. 10. The model investigation was concerned with the study of navigation conditions in the approaches to the lock to determine the adequacy of the proposed design and with the development of measures to overcome or minimize the effects of any adverse conditions. An undistorted 1120-scale model, reproducing approximately 6 miles of the Arkansas River and adjacent overbank area near Morrilton, Ark., including the lock and dam structure, was used for this investigation. The investigation indicated that conditions in the approaches to the lock with the original design would tend to be difficult and hazardous. Satisfactory navigation conditions could be developed in the upper approach with excavation of the right bank above the lock and submerged dikes to reduce the velocity of currents in the approach. Navigation conditions in the lower approach could be improved by providing sufficient maneuver area for downbound tows to move away from the right bank against the currents moving toward the bank. Construction of a wing dike or extension to the lower guard wall would provide the additional protection and maneuver area required. Streamlining the end of the upper guard wall would reduce the disturbance to flow near the end of the wall and improve the distribution flow through the gated spillway. Author
- Hydrology, Limnology and Potamology
- Civil Engineering