Evaluation of IA SWAT Testing Protocol for ET Controllers
In recent years the Irrigation Association (IA) has developed a testing protocol for Smart Water Application Technologies (SWAT). These technologies consist of irrigation controllers such...
History of the USDA-ARS Experimental Watersheds on the Washita River, Oklahoma
A national experimental watershed network, operated by the Agricultural Research Service of the US Department of Agriculture, was established in 1959 to conduct research on the effects...
Irrigation Hydrology: Crossing Scales
Hydrology is the science concerned with distribution, circulation, and properties of water of the earth and its atmosphere, across the full range of time and space scales. Subject matter...
A Paradigm Shift in Irrigation Management
In coming decades, irrigated agriculture will be called upon to produce up to two thirds of the increased food supply needed by an expanding world population. But the increasing dependence...
Water Quality Aspects of Irrigation and Drainage: Past History and Future Challenges for Civil Engineers
This paper presents a brief history of irrigation and drainage related to ASCE activities on its Jubilee. This paper discussed legislation and policies that affect irrigation and drainage...
Introduction
This chapter serves an introduction for the book. The purpose of the manual is to present to users a process of selecting an irrigation method and to inform them of the capabilities and...
Irrigation Method Selection Process
Intelligent selection of the irrigation method that best meets the goals and objectives of an irrigated agricultural development is of primary importance in the design process. A system...
Surface Irrigation
Surface irrigation refers to a large group of irrigation methods in which water is distributed by gravity over the surface of the field. Water is typically introduced at the high point...
Drip/Micro Irrigation
Drip/micro irrigation (also previously referred to as trickle irrigation) refers to a variety of irrigation methods in which water is delivered directly to small areas adjacent to individual...
Sprinkler Irrigation
In sprinkler irrigation, water is applied to the soil using a pressurized piping system with nozzles, jets, or perforated pipe that sprays the water into the air. These sprinkler devices...
Subirrigation: Water Table Management
Water table management (subirrigation) is accomplished by controlling the water table, usually through a subsurface drainage system. The crop is subirrigated with water being furnished...
Economic Valuation of Agricultural Water Use for Large-Scale Modeling
(No paper) A state-wide irrigated agricultural production model has been developed for California. The model is an extension of the Central Valley Production (CVP) Model that was most...
Inviting Trouble Downstream
When dam-building advocates, representing power generation, irrigation and flood control interests, get their project built, flood control ranks third in priority. Soon, development encroaches...
Water Wisdom of the Ancients
Two water systems thousands of years old--the falaj system in Oman and China's Dujiangyan water works--are still in use today. A climatologist describes how these systems...
Alternatives for Managing Shallow Ground Water in Arid Irrigated Areas
The combined operation of a drainage system for subirrigation and drainage is being considered for application in arid areas of the world. This is accomplished by modifying an irrigation...
Optimum On-Farm Irrigation Efficiency for Sustainable Agriculture
In irrigated agriculture, on-farm irrigation efficiency and salinity build-up in the crop root zone are interrelated. Sustainability of soil productivity and crop production depends on...
Dormant Season Alfalfa Water Balance on the NIIP
Non-growing season water balance parameters were measured for alfalfa under high-elevation desert conditions of the Navajo Indian Irrigation Project in northwest New Mexico. The lysimeters...
Genetic Algorithm Design of Piped Irrigation Systems
The design of piped irrigation systems is a complex matter. In its simplest form it involves the selection of the sizes of pipes and other hydraulic elements so as to ensure that the varying...
Economic Incentives Encourage Improvements In Farm-Level Water Management Practices
The Broadview Water District has implemented economic incentive programs in recent years to encourage improvements in irrigation practices to reduce the volume of subsurface drain water...
Flexible Water Deliveries: One District's Experience
The Merced Irrigation District (MID) has implemented two significant incentive programs in 1995 to provide surface irrigation water to farmers who have shifted to private wells for irrigation....
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