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Crop Production Models in Water Management
A weather generating model called WMAKER is introduced. The model generates daily climatic data based on the mean monthly values of temperature, precipitation, number of rainy days and...

Choices Between Micro and Mainframe Computers
The explosion of microcomputers (PCs) has shifted a great amount of engineering computing from mainframes to micros. It has also shifted a lot of programming from FORTRAN to BASIC. This...

Reducing Maintenance Costs of Irrigation Systems
Reducing the costs of maintaining an irrigation water delivery system is becoming more important as the financial problems of the irrigators become more critical. The maintenance costs...

Delivery System Management Via Dynamic Programming
Management of irrigation water delivery systems may involve allocating limited water supplies over both time and space under uncertain future demands. The physical delivery systems are...

Effective Precipitation in Irrigation Design and Management
Effective precipitation is important in irrigation system design and operation. Numerous methods for estimating effective precipitation have been proposed in the past, including direct...

Shallow Groundwater Reuse in Alfalfa Irrigation
Two shallow groundwater reuse options in alfalfa irrigation are examined. Alfalfa water use from the water table is investigated using a drainage component model. It is shown that alfalfa...

On-Farm Management Alternatives to Reduce Subsurface Drainage in the San Joaquin Valley, California?Constraints to Implementation
The most cost effective approach for mitigating the drainage problem is incorporating on-farm management practices that reduce percolation and seepage losses to the shallow groundwater...

Subsurface Drainage System for the Klamath Project
The U. S. Bureau of Reclamation's Klamath Project was authorized in 1905 for irrigation purposes. A subsurface drainage system was constructed in the public lands within the...

U.S. Bureau of Reclamation: How Irrigation Projects are Sized
The objective of this study was to review the methods presently used by the United States Department of Interior, Bureau of Reclamation (Bureau) to estimate the water requirements for...

The Relationship of Benefits to System Size for Irrigation Projects
This paper presents a generalized linear programming (LP) and farm budget model for optimization of on-farm irrigation benefits resulting from variations in irrigation project size. The...

Daily Diversion Forecasting for a Large Irrigation Project
A procedure has been developed and tested to forecast demand-type large irrigation diversions on a daily basis. The model is based on hydrologic concepts as well as irrigation scheduling...

ARS Water Data Bank?A Storage System for Hydrologic Data
Precipitation and streamflow records are considered basic for all hydrologic studies, and are an important product of water research projects in the Agricultural Research Service (ARS)....

Distributed Ground-Water Data Base of the U.S.G.S.
During the past 20 years, the ground-water data base of the U. S. Geological Survey has evolved from paper files in local offices, to a national data base on a central mainframe computer,...

Crop-Water Production Functions and System Design
A Task Committee to evaluate application of crop-water production functions to irrigation system design and management was established by the ASCE Irrigation Water Requirements Committee...

Farmer Adoption of Irrigation Automation
Farmer acceptance of irrigation automation for water conservation in the eleven Western states is limited. About 29,000 acres, or 0. 1 percent, of the 25 million acres irrigated in these...

The Reclaimed Water Delivery System and Reuse Program for Tucson, Arizona
The City of Tucson has implemented a reclaimed water reuse program in a community-wide effort to preserve high quality groundwater for potable and other priority uses. Presently, the system...

The Lubbock, Texas, Land Treatment System
The land treatment system at Lubbock, Texas provides an excellent model for studying the response of a system to growth. It also provides insights and justification for current criteria...

Groundwater Vulnerability to Contamination: A Literature Review
Methods are needed to allow regulatory agencies and resource managers to predict, from readily available data, the potential for groundwater contamination problems. Regional maps developed...

High Plains States Groundwater Recharge Program
The Bureau of Reclamation is conducting a 2-phase program to demonstrate the feasibility of recharging declining aquifers in the 17 Western States. The U. S. Geological Survey, Environmental...

Groundwater Recharge Demonstration Projects
In dry climates, natural replenishment rates of aquifers (safe yields) are quite small. Many of these aquifers are being depleted. This is giving rise to an increasing interest in artificial...

 

 

 

 

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