User Identified Short-Term and Long-Term Needs for Pavement Management Innovation
A survey involving 300 practicing engineer's from all over the United States and representing 20 other countries was conducted, concerning ideas and opinions of the priority research needed...
The Napeague Dunes, Long Island, NY
The Napeague Dunes of eastern Long Island, N.Y., consist of a series of three migrating parabolic dunes. The area presently occupied by this system was formerly a 2.7 Km wide inlet following...
Application of Acoustic Hydrosurvey Technology to the Mapping of Eelgrass (
Acoustic hydrosurvey technology provides an efficient and accurate means of surveying the distribution of submerged aquatic vegetation under some circumstances. The San Francisco District,...
Evaluation of Airborne Video Imagery for Distinguishing Intertidal Oyster Reefs
We evaluated the effectiveness of airborne video imagery in distinguishing and mapping oyster (Crassostrea virginica) reefs in Aransas Bay on the southern Texas gulf coast. Imagery obtained...
Atlas of Present Tidal Marshlands, San Francisco Bay, California
An atlas of 26 maps (including index) is described showing existing tidal marshlands of the San Francisco Bay estuarine complex. This work is based upon a prior delineation and acreage...
Historical Atlas of Tidal Creeks, San Francisco Bay, California
Historic widths and depths of 69 major tidal creeks in San Francisco Bay were studied from maps dated from 1852 to the 1980's. Survey maps by the U.S. Coast Survey (and successors, U.S....
Challenges Associated with Metriciation of the Nautical Chart
Under the Metric conversion Act of 1975, Omnibus Trade and Competitiveness Act of 1988, and Executive Order 12770 of 1991 all federal agencies are required to convert to the international...
The Wetted Bound: The Missing Link between Surveying and Planning?
Aerial photographs of the coastline are useful tools for investigating historic shoreline changes, especially in locations where such photographs are available back to the late 1920's....
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...
Long-Term Shoreline Change of the Chandeleur Islands Barrier System, Louisiana: 1855 to 1989
The Chandeleur Islands are the largest barrier island system along the Mississippi River delta plain, and are characterized by low-profile, washover-dominated barriers that are rapidly...
Specific Features of the North-Eastern Black Sea Shelf Stucture
The results of field geological-lithodynamic and geomorphological studies and the review of published data have been used to analyze the structure of the North-Eastern Black Sea coastal...
Morphological Trends of the Belgian Coast Shown by 10 Years of Remote-Sensing Based Surveying
The morphological evolution of foreshore, backshore, and adjoining dunes of the entire Belgian coast is surveyed by means of aerial remote sensing on a yearly basis since 1983. The evolution...
A Revised Snowstorm Maximization Method for Canadian Boreal Regions
A proposed refinement in the development of design snowpacks for use in the derivation of probable maximum floods (PMF) estimates in the Canadian Boreal is presented. Shortcomings in the...
Survey of GIS Applications in Surface Water Hydrology
Geographic information systems (GIS), computerized tools for management and manipulation of spatially referenced data, are increasingly being used for engineering analysis and design of...
Artificial Neural Networks as Unit Hydrograph Applications
A simple artificial neural network is shown to have the same structure as the application of a unit hydrograph. An artificial neural network representing such an application was constructed,...
U.S. Geological Survey Bedload Sampling Policy
During the late 1960's, the U.S. Geological Survey's (USGS) Water Resources Division (WRD) developed the Helley-Smith bedload sampler. Since then, the USGS and the Technical Committee...
Plans for a Sensitivity Analysis of Bridge-Scour Computations
Plans for an analysis of the sensitivity of Level 2 bridge-scour computations are described. Cross-section data from 15 bridge sites in Texas are modified to reflect four levels of field...
Debris Flows and Mass Wasting in Volcanic Torrents
Observation of debris flow and topographic survey for mass wasting in the volcanic torrents clarified that (1) mass wasting processes such as rock fall from the side-wall and toppling...
Acoustic Doppler Current Profiler for Inlet Current Measurements
A BroadBand Acoustic Doppler Current Profiler (BroadBand ADCP) was used to survey tidal currents at Shinnecock and Moriches Inlets, Long Island, NY. Measurements were made remotely form...
Estimating Bridge Scour in New York from Historical U.S. Geological Survey Streamflow Measurements
Historical streamflow measurements by the U.S. Geological Survey an bridge-inspection reports by the New York State Department of Transportation are being used to estimate scour at 31...
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