Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 3621-3640 of 3826
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Quality Requirements for Irrigation with Sewage Water
(American Society of Civil Engineers, 1987)Irrigation is an excellent use for sewage effluent because it is mostly water with nutrients. For small flows, the effluent can be used on special, well‐supervised “sewage farms,” where forage, fiber, or seed crops are ... -
Closure to “<i>Evaluation of Hydrologic Models Used to Quantify Major Land‐Use Change Effects</i>” by the Task Committee on Quantifying Land‐Use Change Effects of the Watershed Management and Surface‐Water Committees of the Irrigation and Drainage Division (March, 1985, Vol. 111, No. 1)
(American Society of Civil Engineers, 1987) -
Salinity Management Model: II. 1‐ and 2‐D Applications
(American Society of Civil Engineers, 1987)A finite element model to simulate salt flow and underdrainage for shallow water table conditions (presented in Part 1) is used to simulate two illustrative cases. The first case involves a one‐dimensional problem in which ... -
Planning Model of Irrigation District
(American Society of Civil Engineers, 1987)A linear optimization model for planning the management of Irrigation District No. 38, in the State of Sonora, Mexico, is presented. The model considers the yield, price, and production cost of twelve primary crops; the ... -
Evapotranspiration Estimates in Extremely Arid Areas
(American Society of Civil Engineers, 1987)Consumptive use or evapotranspiration is an important element for estimating irrigation water requirements and in water resources management, especially under arid conditions where fresh water is a limited resource. In ... -
Salinity Management Model: I. Development
(American Society of Civil Engineers, 1987)A finite element model is developed to simulate salt accumulation and transport as well as under drainage in irrigated croplands. The model simulates the flow of water and salts in a saturatedunsaturated soil system, ... -
Furrow Model with Specified Space Intervals
(American Society of Civil Engineers, 1987)A complete furrow irrigation model was developed based on the cumulative solution of the volume balance equation, rather than the incremental solution. Space intervals were given (constant or variable) to allow infiltration ... -
Flood Frequency Estimates in Southeastern Arizona
(American Society of Civil Engineers, 1987)The effect of the October 1983 floods in southeastern Arizona, on a previously established generalized envelope for floods expected once in 100 years -
Discussion of “<i>Evaluation of Hydrologic Models Used to Quantify Major Land‐Use Change Effects</i>” by the Task Committee on Quantifying Land‐Use Change Effects of the Watershed Management and Surface‐Water Committees of the Irrigation and Drainage Division (March, 1985, Vol. 111, No. 1)
(American Society of Civil Engineers, 1987) -
Modeling Surge Irrigation Infiltration
(American Society of Civil Engineers, 1987)A recirculating furrow infiltrometer is used to measure infiltration for simulated surge irrigation for various cycle times and cycle ratios. The data collected from three locations is used to evaluate two empirical surge ... -
Classification of Irrigation Water Conveyance System Components
(American Society of Civil Engineers, 1987)Classification systems for irrigation water conveyance facility components which directly af Fect the operation of open channel and pipeline systems are presented. Components are initially classified into four groups ... -
Simple Laboratory Measurement of Unsaturated Hydraulic Conductivity
(American Society of Civil Engineers, 1987)A simple method called “upward infiltration method” is described for using common soil laboratory equipment to measure unsaturated hydraulic conductivity of soil samples in a short time. The method is based on measurement ... -
Discussion of “<i>New Approach for Analysis of Aquifer‐Test Data</i>” by Sushil K. Goyal (December, 1984, Vol. 110, No. 4)
(American Society of Civil Engineers, 1987) -
Evaluating Partial Areas of Watershed Runoff
(American Society of Civil Engineers, 1987)Variations in surface storage capacity over a watershed produce partial areas of saturation overland flow, which vary from storm to storm. A method is described by which the proportions of a watershed that contributes ... -
Algebraic Computation of Flow in Furrow Irrigation
(American Society of Civil Engineers, 1987)A complete algebraic model simulating furrow irrigation is presented. It can be used to analyze and predict the performance of sloping openended furrow irrigation systems, based upon the solution of a mass conservation ... -
Discussion of “<i>Evaluation of Hydrologic Models Used to Quantify Major Land‐Use Change Effects</i>” by the Task Committee on Quantifying Land‐Use Change Effects of the Watershed Management and Surface‐Water Committees of the Irrigation and Drainage Division (March, 1985, Vol. 111, No. 1)
(American Society of Civil Engineers, 1987) -
Contraction Ratios for Weir and Flume Designs
(American Society of Civil Engineers, 1987)A new approach to the design of flumes and weir for open channels is developed. The approach is based on matching the flume to approach channel conditions thus providing an appropriate Froude number in the approach channel ... -
Closure to “<i>New Approach for Analysis of Aquifer‐Test Data</i>” by Sushil K. Goyal (December, 1984, Vol. 110, No. 4)
(American Society of Civil Engineers, 1987) -
Circular Gates in Circular and U‐Shaped Channels
(American Society of Civil Engineers, 1987)The discharge‐head relation of flows in circular and U‐shaped channels under circular thin plate gates is established. The coefficient of discharge is determined experimentally and it is found that only the effect of the ... -
Surface‐Irrigation Nonlinear Optimization Models
(American Society of Civil Engineers, 1987)Nonlinear optimization models are developed to design and manage furrow and border irrigation methods. The objective function of the basic nonlinear model is constructed on the basis of a profit relationship, while that ...