Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 3141-3160 of 3826
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Capillary‐Tube Infiltration Model
(American Society of Civil Engineers, 1993)The concept of treating soil matrix as a bundle of capillary tubes was used extensively in the analytical description of hydraulic conductivity of unsaturated soils. Such a concept has seldom been used in the development ... -
Nitrate Leaching under Irrigated Corn
(American Society of Civil Engineers, 1993)Nitrate leaching was measured under no‐till and conventional tillage irrigated corn on a sandy loam soil. Ground water was sampled monthly for two years. Soil samples were taken three or four times a year to a depth of 150 ... -
Concentrations, Distribution, and Sources of Selenium from Irrigated Lands in Western United States
(American Society of Civil Engineers, 1993)Concentrations, distribution, and sources of selenium from irrigated lands were studied between 1986 and 1990 at 20 reconnaissance project areas in 17 western states under the Department of Interior's National Irrigation ... -
Prognosis on Managing Trace Elements
(American Society of Civil Engineers, 1993)Concern over the potentially toxic effects of trace elements in agricultural drainage waters has been aroused by the discovery of selenium poisoning of wildlife at Kesterson Reservoir, California, and was heightened further ... -
Kesterson Crisis
(American Society of Civil Engineers, 1993)The events leading to selenium contamination at the Kesterson Reservoir, a man‐made marsh in the Central Valley of California, began in the early 1900s, with the diversion of water to irrigate saline soils containing ... -
Transient Infiltration from Cavities. II: Analysis and Application
(American Society of Civil Engineers, 1993)A physically based infiltration model describing two‐dimensional infiltration from cavities, for example irrigation furrows, is discussed. According to the different stages of model development, three versions with varying ... -
Soil‐Water Distribution under Trickle Source
(American Society of Civil Engineers, 1993)Soil‐water distributions in homogeneous soil profiles of Yolo clay loam and Yolo sand irrigated from a circular source of water were measured at several times after initiation of irrigation. The effect of trickle discharge ... -
Transient Infiltration from Cavities. I: Theory
(American Society of Civil Engineers, 1993)A new method for describing infiltration during filling and draining of cavities such as, for example, irrigation furrows is presented. The model development decomposes in a first step the two‐dimensional (2D) infiltration ... -
Treatment, Reuse, and Disposal of Drain Waters
(American Society of Civil Engineers, 1993)The treatment, reuse, and disposal of agricultural drainage water present formidable technical problems in the management of salts and associated trace elements. Although many promising treatment technologies and disposal ... -
Discussion of “Hydraulic Characteristics of Circular Flumes” by Zohrab Samani, Saeed Jorat, and Mohammed Youssaf (July/August, 1991, Vol. 117, No. 4)
(American Society of Civil Engineers, 1993) -
Closure to “Hydraulic Characteristics of Circular Flumes” by Zohrab Samani, Saeed Jorat, and Mohammed Youssaf (July/August, 1991, Vol. 117, No. 4)
(American Society of Civil Engineers, 1993) -
Criteria for Evaluation of Watershed Models
(American Society of Civil Engineers, 1993)This report addresses the problem practicing engineers face as they try to evaluate the usefulness of watershed models for solving engineering problems. The report addresses the need for more complete parameter descriptions, ... -
Step‐Function Response of Muskingum Reach
(American Society of Civil Engineers, 1993) -
Critical Depth, Velocity Profiles, and Averaging
(American Society of Civil Engineers, 1993)Open-channel hydraulics is a subset of shallow-water theory that, in turn, is a subset of hydrodynamics. The distinguishing feature of shallow-water theory is the assumption of hydrostatic pressure. One-dimensional, ... -
Discussion of “Hydraulic Characteristics of Circular Flumes” by Zohrab Samani, Saeed Jorat, and Mohammed Youssaf (July/August, 1991, Vol. 117, No. 4)
(American Society of Civil Engineers, 1993) -
Experimental Study of Processes and Particle‐Size Distributions of Eroded Soil
(American Society of Civil Engineers, 1993)The study presented here consists of rainfall‐runoff events produced with a large rainfall simulator. Three test plots were 2.44 m wide, with lengths of 6.1 m, 13.72 m, and 24.38 m, and a slope of 2%. The soil on the plots ... -
Critical Depth Equations for Irrigation Canals
(American Society of Civil Engineers, 1993) -
Holistic Approach to Irrigation Management in Developing Countries
(American Society of Civil Engineers, 1993)The sound development of irrigation and drainage enterprises in developing countries is a continuing need to reduce hunger, environmental degradation, and population growth, and to promote political stability and international ... -
Asymptotic Determination of Runoff Curve Numbers from Data
(American Society of Civil Engineers, 1993)Background, general instructions, and examples are given for determining runoff curve numbers (CN) from small watershed event rainfall and direct runoff data sets. The technique matches rank‐ordered (i.e., sorted) rainfall ... -
Evaluation of Runoff and Erosion Models
(American Society of Civil Engineers, 1993)Runoff and sediment yield for 30 runoff events on three experimental watersheds are calculated using the agricultural non‐point‐source pollution (AGNPS), areal non‐point‐source watershed environmental response simulation ...