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Composite Materials for Structures on Planetary Surfaces
Development of structures for planetary surface environments depends upon the use of the most appropriate materials. Advanced composite materials are apparently the best candidates for...

SALSA: A Lunar Submillimeter-Wavelength Array
A conceptual design is described for a lunar submillimeter-wavelength interferometer called SALSA, a Synthesis Array for Lunar Submillimeter Astronomy. The intent is to describe SALSA...

Dynamic Response of Uncertain Two-Dimensional Structures
A concept for the reliability analysis of structures with uncertain elastic and mass properties is presented. Its applicability is shown by means of a numerical example. The results are...

Surface Motion Due to Stochastic Plane Sources in a Layered Medium
To simulate the ground motion in the near field, a seismic fault is modeled as a two-strip plane. The width of each strip is so thin that the rupture process of the strip can be described...

Engineering of Controlled-Drainage Systems
Soil-water management by water table control (via a dual purpose subdrainage-subirrigation system) is becoming popular in humid regions of the U.S. and Canada. Controlled-drainage is an...

?H and ?⁴C as Tracers of Ground-Water Recharge
Surface spreading of water from the Santa Clara River is used to recharge aquifers underlying the Oxnard Plain. These aquifers are divided into an upper system about 400 feet thick, and...

Evapotranspiration Data Management in California
This paper will discuss components of the California Irrigation Management Information System (CIMIS). CIMIS is an automated agricultural weather network operated by the California Department...

ETBC: Interactive Software for Blaney-Criddle Estimates of Evapotranspiration
ETBC is a menu-driven computer program which calculates monthly evapotranspiration (ET) using the USDA Soil Conservation Service version of the Blaney-Criddle formula, as described in...

Economical and Statistical Based On-Farm Irrigation Scheduling
Most irrigation scheduling techniques are not based upon the statistics of the irrigations or economics of irrigated crop production. Traditional irrigation scheduling is based upon average...

Importance of ET on Colorado River Water Quality
Salinity is a major problem in the Colorado River. About 37 percent of the salt loading is contributed by irrigated agriculture activities. Deep percolation and seepage from irrigated...

Influence of Irrigation on Subsurface Drainage
The influence flood irrigation has on drainage effluent in terms of discharge rates and water quality was analyzed at an artificially drained alfalfa field in Fallon, Nevada. Immediately...

Irrigation Project Modernization
Project modernization for sustainable irrigation requires a design and operation plan which will provide water deliveries with flexibility and reliability at each level within the system....

Technology Transfer Lessons from a U.S. Water District
An interceptor canal will be constructed near the end of eight laterals to collect and transport operational discharge and returned farm deliveries to a reservoir for temporary storage....

Technology Transfer for Projects in South America
Engineering services were provided for three projects in South America. One project was located in the Pampa Region of Argentina and two others in northern Brazil. The projects were: 1)...

Greenhouse Irrigation Technology Transfer in Spain
In recent years, an intensive horticultural production system using unheated, plastic greenhouses has been widely adopted in the Mediterranean basin. Greenhouses now occupy more than 15,000...

Promoting Private Irrigation Development: The Irrigation Sector Program Experience in Nepal
In 1988, Nepal embarked on development of an Irrigation Sector Program. The key ingredients of the program are direct farmer participation in irrigation development and establishment of...

Technology Transfer to Developing Countries
Foreign assignments have proven to be the most interesting and rewarding part of a career for many western professionals. For success, however, care must be taken to assure that the individual...

Simulating the Effects of Deficit Irrigation for Furrow Systems
The distribution of irrigation water across a field can dramatically affects management of furrow irrigation systems as water supplies become limiting. To assess management strategies...

Design and Maintenance Factors Affecting Application Uniformity of Low Pressure Center-Pivot Irrigation Systems
Uniformity tests were conducted on 30 center-pivot sprinkler systems installed with one of six different low pressure nozzle types or high pressure impact sprinklers. Well designed and...

Holistic Approach to Irrigation Management in Developing Countries
Sound development of irrigation and drainage projects in developing countries is a continuing need to reduce hunger, environmental degradation and excess population growth; and to promote...

 

 

 

 

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