Traffic Congestion Data Collection and Analysis System
The system was developed to allow traffic engineers to analyze the magnitude, duration and location of traffic congestion on highways and city streets. It is used to prioritize traffic...
Maximizing Your Use of Interactive Graphics in Transportation Simulation Modeling
The paper discusses the capabilities, through the aid of computer graphics,now that exist to take analysis and reporting of traffic simulation model studies several steps further than...
Dynamic Assignment Modelling with Trips
This paper describes additional ways in which TRIPS models time-varying, or 'dynamic' effects. These include area-wide effects as vehicles move through the network,...
Using GIS Techniques for Transportation Planning to Automate Compilation of Land Use Information
This paper describes a procedure used to compile land use or socioeconomic data for traffic analysis zones for input into a transportation planning model. The procedure uses a combination...
A Survey of Three-Dimensional Numerical Estuarine Models
This paper surveys the existing 3-D estuarine hydrodynamic and solute transport models by a review of the commonly used assumptions and approximations, and by an examination of the methods...
Calibration of a Transport Model Using Halocarbons
A field study was conducted during April 1987 in which the concentrations of volatile halocarbon tracers, discharged from two existing outfalls, were measured throughout Boston Harbor...
Soil Moisture Measurements in Oil Shale Waste Material Using a Neutron Probe and Time Domain Reflectometry
Five large scale lysimeters (7.3 ? 3.0 ? 3.0 m deep) have been constructed to collect information and data on hydrological factors which affect the movement of water through a large scale...
Neutron Physics Considerations in Moisture Probe Design
Neutron physics can be used to characterize most of the know behavior of neutrons in the soil. Scattering, absorption and slowing down are the principal processes affecting moisture probe...
Using Neutron Probes to Aid Irrigation Scheduling
Neutron soil moisture measurements are used to supplement irrigation forecasts on the 60,000 acre sprinkler-irrigated Navajo Indian Irrigation Project (NIIP). Weekly irrigation forecasts...
Comparison of ET Measured with Neutron Moisture Meters and Weighing Lysimeters
The neutron moisture meter (N.M.) method of determining crop water use is frequently used in research and irrigated agriculture. This study was conducted to compare crop evapotranspiration...
Application of Neutron Soil Surface Water Monitoring for Plant Establishment
Soil surface water content measurements are tedious and time consuming, and to improve on such tasks, a neutron surface moisture probe was modified by using cadmium shielding. This prevented...
Calibration of Tensiometers and Gypsum Blocks Using Soil Moisture Content
The common tensiometer and gypsum block used for irrigation scheduling are evaluated using gravimetric soil moisture measurements. The results indicate several difficulties with the tensiometer...
Operational Remote Sensing of Snow Cover in the U.S. and Canada
The Office of Hydrology of the National Weather Service maintains a cooperative National Operational Hydrologic Remote Sensing Center, based in Minneapolis, to generate remotely sensed...
Regional Flood Frequency Equations for Antelope Valley in Kern County, California
Rapid residential, commercial, and industrial development has occurred in recent years in the Antelope Valley, California. With the new development progressing at full speed, the local...
Application of Geological Information to Arizona Flood Hazard Assessment
Hydrological modeling procedures applied to regulatory flood-hazard zonation can be misapplied when assumptions concerning flood-hazardous processes are violated. Geomorphological mapping...
Iona Outfall Plume Characterization Study
Field studies were conducted in August 1988 to verify the performance of the new deep sea outfall for the Greater Vancouver Regional District (GVRD) Iona Island Sewerage Treatment Plant...
Conceptual Evaluation of Dam Safety by Instrumentation
The criteria governing the design of dams can frequently be imprecise. One of the most practical methods of evaluating dam safety in the dam safety surveillance programs is to check the...
Data Acquisition for Determining the Physical Impacts of Navigation
Research is being conducted to determine the physical effects of navigation on the Upper Mississippi River System (UMRS). Extensive field data on various aspects of physical effects of...
Beach Evolution in Sulphur Island
Seasonal variation of shore area of Sulphur Island is studied by analyzing aerial photographs of the island taken seasonally for the past two years. Analysis reveals that shore area in...
Major Sedimentation Issues for the USGS
Historically, sediment information has been used primarily in planning for engineering structures that were designed to meet a single or a very limited number of objectives. Today most...
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