Nonlinear Shoaling and Impact of Waves on Coastal Structures
A two-dimensional fully nonlinear potential flow model is used to calculate shoaling of solitary and enoidal waves over a sloping bottom and interaction with submerged or emerged coastal...

Computer Simulation of River Channel Changes at a Bridge Crossing on a Point Bar

Using a Numerical Model to Evaluate Dredging Options

The Technical Challenge of Mechanized Excavation for Nuclear Waste Repositories
The requirements of mechanized tunnelling and shafting techniques within this newly developing field, namely the excavation of Nuclear Waste Repositories, will challenge the designers...

Wave Shoaling on Uniform Currents
The purposes of this paper are to investigate the characteristics of waves coexisting with uniform currents on a sloping bottom. The theoretical calculations of the third order approximation...

Use of Bar Code Technology to Simplify Sieve Analysis Data Acquisition
A system has been developed at the U.S. Army Corps of Engineers Ohio River Division Geotechnical Engineering Laboratory using bar codes and a computer coupled balance to aid in data collection...

Debris Removal and Channel Shoaling
Hurricane Hugo was one of the worst storms of the century to strike the east coast of the United States. The storm tracked a northwesterly course approximately 11:30 P.M. on Sep. 21, 1989....

Planning of an Offshore Fishing Port in Shallow Sandy Beach

Monitoring of the 1985/86 Beach Nourishment Project at Bar Beach, Victoria Island, Lagos, Nigeria
Bar Beach, Victoria Island, is Nigeria's foremost leisure beach and has been the site of very active erosion following the completion in 1912 of two stone breakwaters perpendicular...

Sediments and Quaternary Study of the Coastal Lagoon of Unare (Venezuela)
The coastal Lagoon of Unare is located in the N.E. of Venezuela (62° 12' - 65° 25' W/10° 04' - 10° 08' N), it is 26 km long and 6 km...

Nantucket Island's Shifting Shoals and Moving Shores: Near-shore Bathymetry Controls Beach Deposition and Erosion
Historical records and our observations show that the near-shore shoal complex of Pochick Rip and Old Man Shoal has slowly but continuously built to the north along Nantucket Island's...

Shoreline Response to Offshore Shoals and Storms, Low Beach, Nantucket, MA
Low Beach is located on the southeast side of Nantucket Island, which is approximately 20 miles offshore from the Cape Cod mainland. It is currently the site of a municipal wastewater...

Infragravity Waves, Longshore Currents, and Linear Sand Bar Formation
A new hypothesis regarding the role of infragravity waves in controlling the formation and offshore migration of linear (2-dimensional) sand bars is presented. The hypothesis is dependent...

Measurements of Suspended Sediment Transport: Prototype Shorefaces
Field measurements of local time-varying suspended sediment flux were obtained using rapid response velocity and sediment concentration sensors at a number of elevations under shoaling...

Phase Speed and Angle of Breaking Waves Measured with Video Techniques
The phase speed and incident angle of breaking surface gravity waves in the surf zone are measured using video processing techniques. The analysis of video data follows two lines. The...

Computer Simulation of Shore-Normal Variations in Sediment Size
A computer simulation model is presented which is designed to predict the selective shore-normal sorting of grain sizes in the nearshore environment. The model simulates wave shoaling,...

Dredging & Nourishment Bulk Determination by Sediment Budget
'Ria' is the Spanish name for a sea flooded valley, whatever its origin and evolution. This paper discusses a project involving the regeneration and protection...

Managing Two Lakes with Significant Tailwater Fisheries
Norfork and Bull Shoals Dams on the White River in Arkansas were constructed in 1944 and 1951, respectively. The authorized purposes were for flood control, hydropower generation, and...

Characteristic Deformation of Alternate Bars Due to Low Flow
Experiments on the formation of a small meander-channel at low stage are conducted by supplying a proper discharge on initial bed of alternate bars that have been formed in experimental...

Maintenance Scheduling for Water Resource Systems: An Application to Advance Maintenance Dredging
A number of investigations have been performed in the recent years to analyze the effect of advance maintenance and to see if it is justifiable. These studies gave promising results but...

 

 

 

 

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