Sand Losses from an Artificially Nourished Beach Stabilized by Groynes
Norderney is one of the East Frisian barrier Islands in Germany. Severe dune erosion jeopardized the settlement and neccessitated the use of seawalls and groynes after 1850. Even though...
Environmental Impacts on a Beach Nourishment Borrow Area, Manatee County, Florida
The author describes how environmental restraints affected a beach nourishment project in Manatee County, Florida. The project's principal sand source contained 24 million cubic yards...
Investigation of the Offshore Bathymetry and Sedimentology of Folly Island, SC: Determination of Potential Offshore Sand Reseves for Beach Renourishment
The authors report on a beach renourishment project started in January 1993 in an attempt to reestablish a high tide beach along most of Folly Island. The objectives of this study were:...
Modification and Layout of the Galveston Island Groin Field for Retaining Sand on Beach
In the past hundred years or so, numerous groin fields have been constructed along the world's coastline. Many of these have little or no existing beach in the groin field. This paper...
Geologic Assessments and Characterization of Marine Sand Resources?Gulf of Mexico Region
The U.S. Geological Survey conducts geologic surveys and research in marine areas of the United States and its territories and possessions. An objective in some of the investigations is...
Morphology of the Wadden Sea Natural Processes and Human Interference
The Wadden Sea can be subdivided in three morphodynamic units: the tidal flats, the inlets and the barrier islands. The deeply incised tidal inlets are the most active of these units;...
Coastal Zone Management in Accra, Ghana
The coastal zone of the capital city of Ghana, Accra, is facing a critical stage in its evolution. In the newt 20 years, the population is expected to more than double from the presently...
Coastal and Sand Spit Evolution from 1958 to 1992: Saloum River Mouth (Senegal, West Africa)
From the bathymetric map made in 1958 with the Marine Hydrographical Service in France (Number 6147), the 1976 Landsat imagery, the 1981 SPOT simulations, the 1991 SPOT data and the field...
A Wave-Energy Dissipation Structure for Shore Protection and Beach Generation, Recovery, and Stabilization
WAVEBLOCK a steel reinforced concrete modularized structure designed to dissipate the energy of saline and freshwater waves is described. The modularized structure, which weighs upwards...
The Magdalen Islands, Gulf of Saint Lawrence
The Magdalen Islands constitute the largest barrier-island system in the Gulf of Saint Lawrence. They represent 435 km of coasts at the 1:50 000 scale, two-thirds of which are sandy and...
Evolution of the Santee/Pee Dee Delta Complex, South Carolina, USA
The Santee/Pee Dee delta is located on the north-central portion of the lower coastal plain physiographic province of south carolina, USA, which is underlain by pleistocene strand plain...
Estimation of Queue Lengths in Urban Road Networks
In this paper we present a new scheme for the surveillance of traffic state on a link of an urban road network. It is shown that measurements of traffic counts and speed values from a...
Filtering and Prediction on Freeways Using Markov Models
A Markov compartment model of freeway traffic flow is presented and used to derive a Kalman Filter which tracks a freeway section's density, broken down by destination. The filter is then...
Infiltration in Two Sand Dune Areas in Saudi Arabia
Field infiltration experiments at several locations in two sand dune areas in Saudi Arabia were conducted. Results of these field tests are compared with predictions of the Green and Ampt...
Real-Time Dynamic Flood Routing with NWS FLDWAV Model Using Kalman Filter Updating
Dynamic flood routing model based on the four-point implicit finite-difference solution of the complete one-dimensional Saint-Venant equations of unsteady flow are inherently deterministic....
Total Sediment Loads of Tropical Rivers
Unmeasured and total sediment discharges were computed for 107 sets of data from the Amazon and Orinoco Rivers and their major tributaries. Unmeasured loads were generally small except...
Prediction of Filtrate Turbidity by Parameter Estimation
In order to operate the rapid sand filter in response to the time variation of effluent quality, a model and a procedure to predict the filtrate quality of rapid sand filters have been...
Large-Scale Embankment Overtopping Protection Tests
The U.S. Bureau of Reclamation (Reclamation), Colorado State University (CSU), and the Electric Power Research Institute (EPRI) have an ongoing cooperative research effort to determine...
Application of Digital Image Processing in Morphological Analysis of Geotextiles
Geotextile filters are rapidly replacing graded granular filters in dams, landfills, edge drains, and retaining walls. The design of these filters requires morphological information about...
Image Enhancement: Application to Geotomography
Image enhancement complements geotomographic reconstruction in the rendering of better images. In this paper, available image enhancement techniques are reviewed. Emphasis is given to...
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