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Optimizing Irrigation Management for Pollution Control and Sustainable Crop Yield
We developed a simulation-optimization model which maximizes crop yield while maintaining target salt concentration in the root zone, and/or preventing salt from leaching to the groundwater....

Farmers' Incentives to Reduce Groundwater Nitrates
Nitrate leaching from irrigated crops is a productive input loss to the farmer and a possible source of environmental degradation. This study uses a simulation model to analyze incentives...

A GIS Approach for Studying Irrigation Management Alternatives to Reduce Salt Loading of River Basins
As part of an ongoing effort to improve the water quality of the Colorado River, many methods have been employed to analyze the overall benefits of alternate irrigation management practices...

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...

Subsurface Drip Irrigation Can Reduce Pollution
Several researchers have indicated that precise subsurface drip (SSD) application of irrigation water can be effectively used to reduce pollution of the aquifer when irrigating with reclaimed...

Irrigation Lettuce with Buried Drip, Surface Drip, and Furrow Irrigation: Spatial Variability of Plants, Soil, and Water
Spatial variability of plant growth, soil, and water was investigated for a furrow, surface drip, and subsurface drip irrigation systems. Variability was analyzed by sampling plant weight,...

Irrigating Lettuce with Buried Drip, Surface Drip, and Furrow Irrigation Systems: Overall Performance
Groundwater nitrate contamination is a major concern in the Salinas Valley of California. The source of much of the nitrate appears to be vegetable production in the valley. A field-scale...

Overview of the Department of the Interior's National Irrigation Water Quality Program
The Department of the Interior National Irrigation Water Quality Program was started in 1985 in response to concerns about contamination of water, bottom sediment and biota in National...

Selenium in Soil, Water, Sediment, and Biota of the Lower Sun River Area, West-Central Montana
A U.S. Department of the Interior study started in 1990 examined the source, movement, fate, and possible biological effects of selenium associated with irrigation drainage from the Sun...

Distribution and Mobilization of Dissolved Selenium in Ground Water of the Irrigated Grand and Uncompahgre Valleys, Western Colorado
Distribution of dissolved selenium in ground water of the irrigated Grand and Uncompahgre Valleys is affected by the aqueous geochemical environment of the shallow ground-water system...

Planning for Remediation of Irrigation-Induced Water Quality Problems in the Middle Green River Basin, Utah
Reconnaissance investigations and detailed studies between 1986-1990 under the National Irrigation Water Quality Program of the Department of the Interior identified and quantified elevated...

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...

AGWATER?
The AGWATER computer program is an interactive learning, teaching, and pre-season evaluation tool regarding agricultural irrigation. It combines the concepts of irrigation scheduling,...

Furrow Irrigation Education
A furrow irrigation simulation computer model based on the volume-balance method is described. The model is used to develop information on furrow system performance that can be used in...

Optimal Commands in Border Irrigation Systems
Optimal command areas and level border irrigation design parameters are obtained for a given available seasonal water supply using a dynamic programming (DP) optimization approach. The...

An Irrigation Allocation Planning Model
An irrigation allocation model using multiperiod linear programming was developed to recommend canal water allocation among different irrigated fields to maximize net annual benefits for...

Development of a Hydrological Database for PROSIM?A Water Rights-Based Operational Simulation Model of the Provo River
The development of a hydrological database for a computer model of the hydrology, water rights, and operations of the Provo and Weber rivers is described. The model uses all pertinent...

FLUME 3.0: A Computer Program for Designing Flumes and Weirs
Long-throated flumes and broad-crested weirs are becoming the preferred measuring devices for use in irrigation canals. A computer program for calibrating these flumes and weirs has been...

AZSCHED?Software for Real-time Irrigation Scheduling
A user-friendly computer based scheduling program was developed to minimize the amount of data which needs to be input by the user by utilizing a network of twenty automated weather stations...

Evapotranspiration by Soil Water Balance Using TDR and Neutron Scattering
The soil water balance method of estimating evapotranspiration (ET) has been widely used since it is considerably cheaper than alternative methods such as the use of weighing lysimeters....

 

 

 

 

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