Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 2901-2920 of 3826
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Interseasonal Irrigation System Planning for Waterlogged Sodic Soils
(American Society of Civil Engineers, 1996)Irrigation system planning and management of a semiarid region in Indian Punjab is imperative for sustainable agriculture. For the management of soil and water resources of these regions, three nonstructural management ... -
Discussion: Discharge Coefficient of Rectangular Side Weirs
(American Society of Civil Engineers, 1996) -
Design of Microirrigation Submain Units
(American Society of Civil Engineers, 1996)A method was developed for designing microirrigation submain units. The lateral discharge equation was used to express the relationship between the discharge and pressure head at the inlet of a lateral to allow a submain ... -
Effects of Spatially Variable Intake on Surface Irrigation Advance
(American Society of Civil Engineers, 1996)Rational evaluation of surface irrigation systems should consider the effects of spatial variations in soil intake properties on advance trajectories and on the uniformity of infiltrated depths. The objective was to quantify ... -
Analysis and Design of Microirrigation Laterals
(American Society of Civil Engineers, 1996)A method was developed for the design of microirrigation laterals based on the required average emitter discharge and the required uniformity of water application. The finite-element method was used to analyze the hydraulics ... -
Modeling Transport of Bromide in Furrow-Irrigated Field
(American Society of Civil Engineers, 1996)The purpose of this study was to investigate the reliability of combining a surface irrigation model (SRFR) and two functional solute transport models (RAO and TETrans) in predicting the position of bromide (Br -
Neural Net for Determining DEM-Based Model Drainage Pattern
(American Society of Civil Engineers, 1996)Manually determining drainage patterns from topographical maps for a grid-based model is time consuming and occasionally subjective. Eight methods including neural network are developed in this study to automatically ... -
Canal Design by Dynamic Programming
(American Society of Civil Engineers, 1996)This technical note presents an approach to irrigation and drainage canal-design procedure that uses dynamic programming where objective function and constraints are related to criteria used in canal design. The canal-design ... -
Discussion and Closure: Two-Dimensional Simulation of Basin Irrigation. I: Theory
(American Society of Civil Engineers, 1996) -
Initial-Inflow-Variation Impacts on Furrow Irrigation Evaluation
(American Society of Civil Engineers, 1996)One of the basic assumptions of the hydrological volume balance models in surface irrigation implies that furrow inflow instantaneously increases to a constant rate: the step-flow condition. Unfortunately this assumption ... -
Simple Irrigation Scheduling Calendars
(American Society of Civil Engineers, 1996)Simple calendars are described that express best dates of irrigation based on long-term weather data. The calendars are intended to promote easy and ready adaption of improved water management practices by farmers in both ... -
Discussions and Closure: Normal-Depth Equations for Irrigation Canals
(American Society of Civil Engineers, 1996) -
Irrigation Policy for Realization of High Agropotential of Bihar State in India
(American Society of Civil Engineers, 1996)The physical problem resulting in poor agricultural and economic growth in Bihar highlights the necessity for the effective and integrated development and optimal utilization of Bihar's water resources. There was only a ... -
Implications of Using Approximate Expressions for Well Function
(American Society of Civil Engineers, 1995)The computation of the well function is required in the analysis of pump test data for leaky or confined aquifers. Approximate expressions have recently been proposed to compute the well function over the whole range of ... -
Storm-Water Infiltration for Peak-Flow Control
(American Society of Civil Engineers, 1995)The feasibility of off-line storm-water infiltration specifically for the reduction of peak rates of storm-water discharge are analytically evaluated. Hydrograph routings are applied to a range of possible conditions and ... -
Nonsteady-State Drawdowns in Two Coupled Aquifers
(American Society of Civil Engineers, 1996)A nonsteady coupled aquifer solution is developed in which transient and steady-state drawdowns can be calculated in a pumped aquifer and in an overlying unpumped aquifer that is separated from the pumped aquifer by a ... -
Selection of Parameter-Estimation Method for LP3 Distribution
(American Society of Civil Engineers, 1996)The quantile prediction accuracy of the log-Pearson type III (LP3) distribution depends largely on the accuracy of the parameter-estimation method used. The performance of a parameter-estimation method, on the other hand, ... -
Seepage from Surface Canals by Boundary Element Method
(American Society of Civil Engineers, 1996)The problem of seepage from unlined surface canals or elongated ponds was investigated. Seepage from single or interacting canals has been computed for a variety of boundary conditions at the bottom of the seepage layer. ... -
Sensitivity Analysis of Furrow-Irrigation Performance Parameters
(American Society of Civil Engineers, 1996)Knowledge of the sensitivity of performance and other related dependent furrow-irrigation parameters, in quantitative terms, to variations in field, design, and management variables can help save a considerable amount of ... -
Modeling in Water Losses Evaluation for Nonhomogeneous Furrow Set
(American Society of Civil Engineers, 1996)Due to differences in infiltration characteristics across field, uniformly delivered furrow irrigation streams advance at different rates. This “inter-row” nonuniformity is combined with the nonuniform distribution of ...