Particles, Pretreatment, and Performance in Water Filtration
Relationships among raw water quality, pretreatment facilities, and the design of packed bed filters are presented and applied. The particle size, particle concentration, particle surface...
Development of Flood Peak Regression Equatins for Small Watersheds in Southwest Florida
Hydrologic investigations were performed on the Belle Meade-Royal Palm Hammock area in Collier County, Florida. The study area, encompassing approximately 79 square miles (205 km**2),...
Automation of Booster Pump Stations
Several techniques have been used to automate booster pump stations for irrigation conveyance systems. These pump stations typically must supply pressurized water for a wide range of flow...
Salt Lake City Flood Experiences
Salt Lake City experienced snowmelt floods during 1983 and 1984. Peaks during these years were very high with many historic records being set in both years. Different and unique problems...
Drain Maintenance in the Imperial Valley
Imperial Valley, located in the southeast corner of California is one of the most intensely irrigated areas in the world. Since Colorado River salinity is currently about 800 mg/l (1....
You Need More Than a Plumber's Helper
Maintenance of subsurface drains may be the least understood and most neglected of all maintenance activities carried out by irrigation districts. Few irrigation districts have a maintenance...
Physical Evaluation of a Buried Drainage System
The drainage problem in the 600,000 acre (1. 5 million ha) Westlands Water District (District), located in the Central San Joaquin Valley in California is that of a perched saline groundwater...
Effects of Streambed Processes on Interaction Between Surface and Groundwater
In open channel systems, the phenomena commonly referred to as 'clogging' is caused by settling of sediment and straining of suspended material as water moves...
Time Rated Infiltrated Depth Families
A new set of infiltration families has been developed, for 'normal' soils to describe cumulative infiltrated depth versus time. This new family of curves is described...
Streamflow Losses in the Santa Cruz River, Arizona
The discharge and volume of flow in a peak decrease as the peak moves through an 89-mile (143 km) reach of the Santa Cruz River. An average of three peaks per year flow the length of the...
Strength of Soils in Terms of Effective Stress
The factors that determine soil strength, such as amount of confinement, density, particle size distribution, mineral friction, aging, particle crushing, and others, produce their effects...
Recent Developments in Resonant Column Testing
The resonant column method of testing soils is reviewed. Recent developments in equipment, specimen configurations, and testing schemes are presented. Some equipment can perform both resonance...
Limits on Dynamic Measurements and Instrumentation
The implementation of the FFT (Fast Fourier Transform) into portable instrumentation has contributed to advances not only in signal analysis but also to new and improved transducers for...
Shallow Seismic Exploration in Soil Dynamics
Methods of shallow seismic exploration of soils are continually developing and evolving. Advances in techniques and equipment for performing crosshole and downhole tests, new data on interpretation...
Development of a Multi-Modal Information System
This paper outlines the design and development of a Multi-Modal Information System in Duluth, Minnesota. The system applies state-of-the-art microcomputer technology to the provision of...
Upgrading to Super-Micros
The Association of Central Oklahoma Governments (ACOG) is a regional planning agency and Metropolitan Planning Organization in central Oklahoma, responsible for maintaining a large data...
Security Issues for Microcomputers
This paper addresses microcomputer security in the context of a transportation agency. Schemes for physical protection of hardware, such as locking workstations and alarms, are examined...
Microcomputer Software Support at the State Level
This paper describes a case where the organizational approach to microcomputer control was taken and contrasts the results with optimal individual systems within the group. In this context,...
Microcomputer Needs of Small and Mid-Sized Ontario Transit Properties
This paper describes some current initiatives in Ontario, Canada by a central funding agency to support and encourage the use of microcomputers in small and mid-sized transit properties....
The Group Approach to Implementing Micro Systems
This paper highlights a nearly three year effort to implement microcomputer information systems on 16 small and medium sized transit properties in Wisconsin using a 'group...
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