Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 2481-2500 of 3826
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Modeling Reservoir Irrigation in Uncertain Hydrologic Environment
(American Society of Civil Engineers, 2003)In a detailed model for reservoir irrigation taking into account the soil moisture dynamics in the root zone of the crops, the data set for reservoir inflow and rainfall in the command will usually be of sufficient length ... -
Performance Indices for Surface N Fertigation
(American Society of Civil Engineers, 2003)The application of N fertilizers mixed with a surface irrigation stream (surface N fertigation) is widely practiced in the southwestern United States. Procedures for the optimal design and management of surface N fertigation ... -
Optimal Design and Operation of Irrigation Pumping Stations
(American Society of Civil Engineers, 2003)A methodology based on solving a large-scale nonlinear programming problem is presented for the optimal design and operation of pumping stations. Optimum design and operation refers to the selection of pump type, capacity, ... -
Allocation of Scarce Water Resources Using Deficit Irrigation in Rotational Systems
(American Society of Civil Engineers, 2003)On irrigation schemes with rotational irrigation systems in semiarid tropics, the existing rules for water allocation are based on applying a fixed depth of water with every irrigation irrespective of the crops, their ... -
Discussion of “Simple Method for Confined-Aquifer Parameter Estimation” by Sushil K. Singh
(American Society of Civil Engineers, 2003) -
Evaluation of Various Surface Irrigation Numerical Simulation Models
(American Society of Civil Engineers, 2003)In this study, a zero-inertia model (ZIMOD) is presented to simulate all phases of border and furrow irrigation systems. The governing equations were discretized using a control volume of moving cells, by procedures reported ... -
Estimating Actual Evapotranspiration from Limited Climatic Data Using Neural Computing Technique
(American Society of Civil Engineers, 2003)This paper examines the potential of artificial neural networks (ANN) in estimating the actual crop evapotranspiration (ET) from limited climatic data. The study employed radial-basis function (RBF) type ANN for computing ... -
Discussion of “Dimensionless Curves for Normal-Depth Calculations in Canal Sections” by K. Babaeyan-Koopaei
(American Society of Civil Engineers, 2003) -
Soil Water Retention and Conductivity When Vapor Flow Is Important
(American Society of Civil Engineers, 2003)Models of soil water transport often calculate conductivity -
Pond Water Source for Irrigation on Steep Slopes
(American Society of Civil Engineers, 2003)Existing technologies have been tailored to deliver cost-effective irrigation on a railway embankment and excavated steep slopes (referred to as batters) within a semiarid environment. Irrigation is to aid the establishment ... -
Development of Efficient Stilling Basins for Pipe Outlets
(American Society of Civil Engineers, 2003)The results of experimental work leading to the development of shorter and improved stilling basins for pipe outlets are reported. The original USBR impact type VI stilling basin incorporates a floor that is depressed below ... -
Closure to “Simple Method for Confined-Aquifer Parameter Estimation” by Sushil K. Singh
(American Society of Civil Engineers, 2003) -
Overland Water Flow and Solute Transport: Model Development and Field-Data Analysis
(American Society of Civil Engineers, 2003)The application of plant nutrients with irrigation water is an efficient and cost-effective method for fertilizer application to enhance crop production and reduce or eliminate potential environmental problems related to ... -
Optimal Sizing of On-Farm Reservoirs for Supplemental Irrigation
(American Society of Civil Engineers, 2003)A model was developed for prediction of the optimal size of an on-farm reservoir (OFR) so as to provide supplemental irrigation to rice in monsoon season and presowing irrigation to mustard in winter for a rainfed farming ... -
Closure to “New Algorithm for Hydraulic Calculation in Irrigation Laterals” by Pedro Vallesquino and Pedro L. Luque-Escamilla
(American Society of Civil Engineers, 2003) -
Interactive Effects of Controlled Drainage and Riparian Buffers on Shallow Groundwater Quality
(American Society of Civil Engineers, 2003)As a result of recent surface water quality problems in North Carolina, riparian buffers and controlled drainage are being used to reduce the loss of nonpoint source nitrogen from agricultural fields. The effect of controlled ... -
Water Table Profiles and Discharges for an Inclined Ditch-Drained Aquifer under Temporally Variable Recharge
(American Society of Civil Engineers, 2003)This paper presents the solution of the linearized Boussinesq equation for an inclined, ditch-drained aquifer, with a temporally varying recharge rate. Water-table profiles and flow rates into the ditches are calculated. ... -
General Characteristics of Solutions to the Open-Channel Flow, Feedforward Control Problem
(American Society of Civil Engineers, 2003)A dimensionless formulation of the open-channel flow equations was used to study the feedforward control problem for single-pool canals. Feedforward inflow schedules were computed for specified downstream demands using a ... -
Discussion of “New Algorithm for Hydraulic Calculation in Irrigation Laterals” by Pedro Vallesquino and Pedro L. Luque-Escamilla
(American Society of Civil Engineers, 2003) -
Night Irrigation Reduction for Water Saving in Medium-Sized Systems
(American Society of Civil Engineers, 2003)In many medium-sized irrigation systems water is wasted during the night because demand is low and supply is not reduced accordingly. A hydrodynamic model was applied, using