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Managing Irrigation in the Presence of Groundwater
A method was developed to use lysimeter data for groundwater contribution to crop water use in the irrigation scheduling procedure for a subsurface drip irrigated field underlain by shallow...

Testing of Outlet Works Emergency (Guard) Gates Under Unbalanced Head Conditions ? Background and History
The U.S. Bureau of Reclamation has responsibility for ensuring the proper operation, maintenance, and safety of over 300 dams and reservoirs throughout the 17 Western States. Storage of...

Testing Outlet Works Gates and Valves at USBR Dams Under Unbalanced-Head Conditions: Tieton Dam Unbalanced-Head Gate Test
The Tieton Dam outlet works installation geometry is the most common type used in U.S. Bureau of Reclamation (USBR) earthfill dams. An emergency guard gate is located in a gate chamber...

Standards for Automated Agricultural Weather Stations
A progress report is presented on American Society of Agricultural Engineers (ASAE) Standards Project X505: Measurement and Reporting Standards for Automated Agricultural Weather Stations....

The Utah Climate Center Weather Data Network
The Utah Climate Center weather data network includes 52 sophisticated, automated weather stations. Weather parameters are monitored in real-time and hourly summarized data are gathered,...

Revision of Oregon Crop Water Use and Irrigation Requirements
A project to revise the crop water use estimates and irrigation requirements for the state at Oregon is described. The FAO modified Blaney-Criddle method was applied in this project since...

Hydrological Impacts of a California Water Transfer
Conaway Ranch, located in Yolo County, California, transferred water to the California Emergency Drought Water Bank (Water Bank) in 1991 and 1992. Water for these transfers was generated...

Soil Moisture Monitoring Using a Portable Capacitance Probe
Accurate monitoring of soil moisture has long been in integral part of a successful agricultural management system. Water has increasingly become a valuable and much sought after natural...

Availability Analysis of Irrigation Systems for Improved Management
Availability of an irrigation system is defined as the ratio of time of successful system operation to total desired operation time. Operation is successful when the flow rate of water...

Water Penetration Manual for California Soils
Slow water penetration in irrigated soils is a complex problem of major importance in California's $18 billion agricultural industry. The Kearney Foundation of Soil Science chose to work...

Getting Along: The Geotech and the CM
The opinions of geotechnical engineers are usually respected within a consulting firm, but when such a specialist gets out in the field, he or she is seen as merely part of the backup...

Computer Scheduling and Construction Specs
As recently as the early 1980s, employing computers in critical path method (CPM) scheduling was a formidable decision demanding considerable commitment of time and resources by management....

Lead is a Four-Letter Word
New regulations and strict enforcement make it difficult and expensive to remove lead-laden coatings from steel structures. Lead-based primers and paints are not considered hazardous as...

Local Water, Local Control
Governments throughout the world are trying to improve the performance of publicly-owned and operated irrigation districts by turning operation and management of the districts over to...

A Solid Waste Solution
Burgeoning growth and diminishing landfill capacity have been propelling Broward County, Fla. toward a solid-waste crisis. The county, located along Florida's southeastern...

Pioneer Highway
The 1993 Outstanding Civil Engineering Achievement Award goes to the $490 million I-70 Glenwood Canyon in Colorado. The final link in Interstate 70 from Baltimore, Md. to Cove Fort, Utah,...

Closing the Loop
The 5.1 mi Cooper River Bridge, the longest in South Carolina, completes the I 526 Mark Clark Expressway around Charleston. It is a two-way, four-lane structure with the capability of...

London Linkage
Although it measures just 1.8 km, the Limehouse Link tunnel in London is both a complex engineering project and a gateway to urban renewal. The link is a $350 million highway tunnel connecting...

California Water Issues?Bay-Delta Hearings?Impacts on State Water Project
The State Water Resources Control Board's impending Decision 1630 is described along with its potentially substantial impacts on California's water supplies. Department of Water Resources...

Issues in Balancing Environmental Costs and Benefits in Water Resources Planning
Water projects differ in their physical and economic characteristics and their environmental impacts. Many environmental impacts are addressed through project design and these associated...

 

 

 

 

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