In Situ Measurement of Preferential Flow
An experiment was performed that quantifies the variability of flow paths in the vadoze zone. Bromide tracer and an organic dye, which has many of the same transport characteristics as...
Transport of Grain-Water Mixture by Waves
The numerical modelling of the morphological changes of coastal regions is hampered by the multiplicity of empirical sediment transport formulae. The paper discusses the modes of transport...
Agriculture and Groundwater Quality
Nitrates and pesticides used in agriculture cause groundwater degradation. Agricultural practices in the U.S. will have to be changed to alleviate the health effects of these chemicals....
Design Considerations for Trucks in Work Zones
In an Eastern state a 3. 8 mi (6. 2 km) work zone had 14 accidents during a project duration of 120 days. Eleven of the 14 accidents occurred at temporary crossovers where traffic was...
Accommodation of Trucks on the Highway
Safety in Design
This book contains the papers presented at the symposium on accommodation of trucks on highways held in Nashville, Tenn., May 11, 1988. The papers address highway factors that contribute...
Sorption and Transport of Aldicarb Through the Vadose Zone
The literature was reviewed regarding the sorption and transport of a nonionic organic pesticide aldicarb, an extremely toxic and relatively water soluble carbamate insecticide that has...
Artificial Recharge Research at the University of Arizona
This paper summarizes pit- and well-recharge trials at Tucson, Arizona. The pit recharge trials examined management techniques and characterized flow patterns in the 80 ft thick vadose...
Monitoring for Hazardous Waste Leaks
It is safer and cheaper to keep hazardous wastes out of the groundwater and the ground than to remove them. But better monitoring will be required. In this three-part article, the first...
Maritime Planning in New Zealand
This paper discusses maritime planning in New Zealand. After giving some background information, it deals with the statutory basis of such planning. It then looks at the Auckland experience,...
Urban Waterfront Zoning: Using CZM Goals to Encourage Revitalization
New York City has historically been a major port and waterfront industrial city. With changes in freight shipping and industrial development, much of the waterfront is no longer needed...
Design Features of the Elliott Bay Marina
The paper presents a summary of the major coastal engineering design features of a new Puget Sound small craft harbor proposed for construction within the City of Seattle. The 1,200 berth...
Municipality of Metropolitan Seattle West Point Beach Restoration
There are many ways to manipulate shorelines to prevent erosion. Such efforts often reduce the usable habitat and recreational area associated with the beach. Construction of a natural...
Shoreline Protection Through Process Stabilization (
Considerable analytical work, including model testing, has been conducted to increase understanding of performance and failure. There is a separate category of problems, however, where...
Nearshore Sand Sources for American Samoa: An Alternative to Using Beach Sand
Using a combination of geophysical techniques, in situ observations, and sampling by scuba divers, we investigated along the south shore of Tutuila Island, American Samoa, for nearshore...
Subarea Planning Using Microcomputers
This paper presents the basic features of a subarea focusing program developed by JHK & Associates through a contract with the U. S. Department of Transportation. The program is...
A Power Planning Model for Seismic Risk Zones
We present a model to configure a nuclear power system consisting of plants and the distribution network. In the model, we quantify seismic risk as comprehensively as possible in terms...
Urban/Rural Interactions in Dade County, Florida
Dade County, which contains the City of Miami, is generally urbanized, yet contains pockets of rural and semi-rural areas. These areas are affected by surrounding urbanization, and some...
Coast of California Storm and Tidal Waves Study: A Regional Coastal Zone Monitoring Program
An integral aspect of the Coast of California Storm and Tidal Waves Study (CCSTWS) was the implementation of a four year comprehensive regional coastal zone monitoring program in 1983....
Foreshore Treatment as a Method of Coastal Protection
This paper describes the damages sustained by a small section of the Vancouver, British Columbia coastline during the passage of a storm in December, 1982. This stretch of protected coastline...
A New Approach to Coastal Management: Britain's Heritage Coasts
In 1970, a new concept of countryside management called 'Heritage Coasts' was introduced into Great Britain by the Countryside Commission, a branch of Government....
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