Tailwater Management with Surge Irrigation
Field data of surge irrigation has shown that, in the post-advance stage, there exists an optimum post-advance cycle time. Cycle time greater than or less than the optimum post-advance...
Transfer of Weather Modification Technology to Users
The Task Committee on Utilization of Weather Modification Technology was formed in October 1984 with the stated purpose 'To facilitate the transfer of information concerning...
Feasibility of Weather Modification for California's State Water Project
The California Department of Water Resources (DWR), in the mid 1950's, contracted with some 30 water agencies to eventually furnish about 4. 2 million acre-feet (MAF) of water...
Weather Modification Versus Drought?No Contest
The Colorado River Municipal Water District has sponsored a summertime West Texas cloud-seeding program to increase rainfall in each year since 1970. Because of the program's...
Three Rainfall Augmentation Programs in Texas
Three rainfall augmentation programs were initiated during the summer of 1985 in response to drought conditions affecting Texas in 1984. These programs were supported by two municipalities...
Selenium Removal?Can We Afford It?
The process of biologically removing the element selenium from agricultural drainage water is discussed and an economic evaluation of the process is presented. If by-products can be recovered,...
Selenium: Essential Nutrient or Toxic Threat?
The essential nutrient selenium is believed responsible for numerous deformities, reproductive failures, and deaths of migratory birds at Kesterson Reservoir in the San Joaquin Valley,...
Selenium: It's Not Just in California
The U. S. Department of the Interior has embarked on a series of reconnaissance level investigations throughout the western states to identify and assess potential irrigation-induced water...
Agricultural Drainage Water?How Should It be Regulated?
This paper discusses the existing framework of California liquid waste disposal law, the obstacles presented by these and other laws pertaining to agricultural drainage water disposal...
The Animas-La Plata Project Cost Sharing Agreement
The United States Congress required a cost-sharing agreement between the project beneficiaries and the Federal government. Under this agreement of June 30, 1986, the project will be constructed...
Future Directions on World Bank Irrigation Projects in India
Irrigation development in India is proceeding at a record rate and will continue for several decades. Experience, however, is showing that future directions must entail substantive emphasis...
Economic Benefit of Irrigation on Beef Ranches
Drought can result in forage shortages leading to possible liquidation of the breeding herd. Liquidation is often at depressed prices, and replacement may be at elevated prices. In this...
Optimum Irrigation Under Saline Conditions
A dynamic production function for cotton is estimated. Optimal irrigation volumes, timing, and qualities are calculated using dynamic programming. Optimal water quantities are sensitive...
T Measurements for Irrigation of Sweet Corn
Commonly used scheduling methods are based on a water balance approach where evapotranspiration (ET) must be either estimated from climatic data or by soil water depletion measurements....
Steady State Fluid Transport Model for Plants
Knowledge of water potentials throughout the xylem and phloem elements as well as in individual cells is fundamental for understanding effects of water and temperature stress on transport...
Evaluation of Methods to Determine Peak Period Irrigation Water Requirements
Methods for estimating the peak period irrigation water requirement were evaluated as a component of the review of irrigation facility sizing criteria conducted for the Engineering and...
Review of the Lake Andes-Wagner Project Sizing
Benefit-cost analyses of the proposed U. S. Bureau of Reclamation Lake Andes-Wagner Project have shown the project to be marginally feasible. In an effort to improve the benefit-cost ratio,...
Estimation of Mean Water Depth for Border Irrigation
The mean water depth for border irrigation is derived, using dam-break simple wave solution and boundary layer theory, as a function of inflow discharge, bottom slope, bottom roughness,...
Evaluation of Basin-Furrow Irrigation Systems
The division of the total flow into basin-furrows is analyzed using both energy and momentum principles. A zero-inertia model is applied to simulate the advance phase using different infiltration...
Estimating Number and Duration of On-Times for Surge Irrigation
Research shows surge flow can achieve efficient and uniform irrigation on some soils. However, most available information focuses on computerized analysis and modeling for research purposes....
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