Chemigation Backflow Prevention Assemblies
Chemigation with sprinkler irrigation systems is widely used throughout the United States. One potential environmental hazard of this practice is the point source water contamination due...
Advanced Chemigation Systems for Environmental Safety and Groundwater Protection
A multifunction irrigation system has been developed which utilizes a separate dynamic in-canopy nozzle system for chemical application. Testing the system with a lithium tracer on four...
Potassium Fertigation in Drip Irrigated Peppers in Puerto Rico
Three potassium fertigation rates (T1 = 100%, T2 = 60%, T3 = 30%) via trickle irrigation, fertilization rates (T4 = 100%, S1 = 100%, S2 = 50%, S3 = 0.0) and nonfertilization (T5 = 0.0)...
Drip Irrigation for a College Container Nursery
A drip irrigation system was installed by students during the summer of 1987 at the Ohio State University Agricultural Technical Institute, Wooster. The goals of this project were for...
Nebraska's Special Protection Area Program
The designation of a Special Protection Area (SPA) under the program allows the state and local natural resources districts to move from the voluntary to the regulatory arena in addressing...
Simple Furrow Advance Ratio Evaluation Technique for Upgrading Management
A simple procedure using the Advance Ratio (AR) is presented. It utilizes on-farm gathered information of advance time, water application time, and depth applied for furrow irrigated field....
Evaluation of Infiltration Equations Used in Surface Irrigation
Computer simulations of an irrigation event were conducted using 6 full hydrodynamic models. All 6 models used the same surface flow equations and a different infiltration component. The...
Hydraulic Studies of Surface Drainage from Level Furrows
Field studies have been completed to quantify the surface drainage phenomenon from level furrows which were rapidly flooded and then drained from the inlet end of the furrow. The proportion...
Furrow Irrigation Performance Using Real Time Control
Computer simulations were conducted, using a simple feedback control algorithm, to determine the potential for improvement of irrigation performance using real-time feedback control. Field...
Needed Social, Cultural and Design Changes to Successfully Manage Nigerian Surface Irrigated Projects
The aim of this paper is to illustrate the broad nature of problems associated with the faulty initial designs of water distribution network and irrigation methods and poor participartion...
Surface Water-Groundwater Relations for Open Channels
For losing channels with clean wetted perimeters (no clogging layers), the seepage rate varies essentially linearly with depth to groundwater if the groundwater is relatively shallow,...
Methods of Evaluating Canal Transmission Losses
This paper discusses various methods presently used to evaluate transmission losses with particular emphasis on those methods used in the Bureau of Reclamation....
Determining Transit Losses for Water Deliveries by Use of Stream-Aquifer Models
Hydrologic modeling of stream-aquifer interaction commonly has been used to quantify transit losses associated with water deliveries, such as those from reservoir storage. This technique...
Conveyance Characteristics of Natural Channels in Wyoming
This paper addresses the quantification of instream or conveyance losses of water being transported within natural stream systems in Wyoming using a net total loss and incremental loss...
Groundwater, Technology, and Society
Water management is a multi-dimensional process. Its measures are technology, institutions and society's desires. For a management strategy to be implementable, it must accommodate...
Institutional Approaches to Ground Water Management
The nature of ground water has made the management of it difficult. Lack of understanding regarding the interrelationship of ground and surface waters has sometimes resulted in unworkable...
1987-88 Actions on El Paso vs. New Mexico
It has been determined by the City of El Paso that water wells near the Texas-New Mexico borders should be used to supplement their water supply in the years 2000-2020. Opposition to the...
The Economic Feasibility of Using Ethanol to Accelerate Groundwater Denitrification
A substantial buildup of nitrate in the groundwater of the eastern Sandhills region of Nebraska is projected by some planners. A groundwater carbon source such as ethanol promotes denitrification,...
A Method for `Warped Surface' Land Forming Design
Most approaches to land forming are based on a plane surface design which in some cases may result in prohibitive costs or excessive removal of top soil....
Economic Analysis of Canal Animal Protection Measures
Justification of canal animal protection measures has been, to a degree, driven by environmental and social constraints and as a result, large expenditures of funds to protect ungulates...
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