Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 1601-1620 of 3826
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Estimating Canal Pool Resonance with Auto Tune Variation
(American Society of Civil Engineers, 2012)The integrator-delay (ID) model is commonly used to model canal pools that do not exhibit resonance behavior. Simple step tests are often used to estimate ID model parameters; namely, delay time and backwater surface area. ... -
Indicator Bacteria Performance of Storm Water Control Measures in Wilmington, North Carolina
(American Society of Civil Engineers, 2012)Indicator bacteria are a common source of impairment in surface waters in the United States. Urban storm water runoff has been identified as a contributor to elevated indicator bacteria concentrations. Six storm water ... -
Mathematical Forms and Numerical Schemes for the Solution of Unsaturated Flow Equations
(American Society of Civil Engineers, 2012)Prediction of water infiltration into the soil, fluid movement in the unsaturated soils, and groundwater recharge are important problems in different fields of science and engineering. Moreover, the transfer of the different ... -
Infiltration, Runoff, and Export of Dissolved Organic Carbon from Furrow-Irrigated Forage Fields under Cover Crop and No-Till Management in the Arid Climate of California
(American Society of Civil Engineers, 2012)Development of best management practices (BMPs) such as conservation tillage and winter cover crop to mitigate runoff and reduce dissolved chemicals in irrigation runoff is an important objective for controlling surface ... -
One-Dimensional Surface Flow and Solute Transport Model for Basin Irrigation in Traditional Surface Application of Fertilizer
(American Society of Civil Engineers, 2012)A basis of contrast for advanced basin fertigation method can be provided by simulating the one-dimensional surface flow and solute transport process of basin irrigation in traditional surface application of fertilizer. A ... -
Simple Method for Estimating Pan Coefficients: Conversion of Pan Evaporation to Reference Evapotranspiration
(American Society of Civil Engineers, 2012)Reference evapotranspiration rates are often estimated by using pan evaporation data because pan data are widely available. Conversion of pan evaporation estimates to reference evapotranspiration relies on the determination ... -
Evaluation of Irrigation Systems by Using Benchmarking Techniques
(American Society of Civil Engineers, 2012)Water scarcity, which is typical of arid and semiarid regions such as Castilla-La Mancha (Spain), makes necessary the efficient use of water and energy resources. For this aim, there are several decision support system ... -
Discussion of “Iterative Formulas and Estimation Formulas for Computing Normal Depth of Horseshoe Cross-Section Tunnel” by Jiliang Liu, Zhengzhong Wang, and Xing Fang
(American Society of Civil Engineers, 2012) -
Estimation of Volumetric Runoff Coefficients for Texas Watersheds Using Land-Use and Rainfall-Runoff Data
(American Society of Civil Engineers, 2012)The rational method for peak discharge ( -
Critical Review on the Parameters Influencing Soil-Water Characteristic Curve
(American Society of Civil Engineers, 2012)The knowledge of unsaturated soil is indispensable for several hydrological and geoenvironmental problems such as permeation of water through vadoze zone, ground water recharge, and deciding irrigation requirements for ... -
Droughts and Irrigation: Study in a River-Based Irrigation Scheme in New Zealand
(American Society of Civil Engineers, 2012)The occurrence of hydrological and agricultural droughts in a river-based irrigation scheme in New Zealand was investigated in this study. Hydrological drought occurred when irrigation supplies fell short of demands. ... -
Soil Water Retention Characteristics of Vertisols and Pedotransfer Functions Based on Nearest Neighbor and Neural Networks Approaches to Estimate AWC
(American Society of Civil Engineers, 2012)Irrigation management in vertisols is one of the major challenges to increase agricultural productivity in India and many developing countries. Unfortunately, information on hydraulic properties of these soils is very ... -
Methodology for Identifying the Best Equations for Estimating the Time of Concentration of Watersheds in a Particular Region
(American Society of Civil Engineers, 2011)In this paper, a methodology is proposed for identifying the best equations for estimating the time of concentration (ToC) of watersheds located in a specific geographic region. The methodology primarily works on the basis ... -
Water-Level Difference Controller for Main Canals
(American Society of Civil Engineers, 2012)The operation of main irrigation canals is complicated in situations in which the operator does not have full control over the canal inflow, or in which there are very long transmission distances from the point of supply, ... -
Discussion of “Iterative Formulas and Estimation Formulas for Computing Normal Depth of Horseshoe Cross-Section Tunnel” by Jiliang Liu, Zhengzhong Wang, and Xing Fang
(American Society of Civil Engineers, 2012) -
Evaluation and Comparison of Drip and Conventional Irrigation Methods on Sugar Beets in a Semiarid Region
(American Society of Civil Engineers, 2012)A field study was conducted on sugar beet during a two-year period to investigate the effects and comparison of different irrigation methods and treatments on crop yield, irrigation water use efficiency (IWUE), and pan ... -
Assessment of Hydraulic Performance of Drip-Irrigation Emitters at Low Head Pressures
(American Society of Civil Engineers, 2011)The hydraulic performance of drip-irrigation emitters is very important for the design of drip-irrigation systems, especially when commonly available high-head emitters are used in low-head drip-irrigation systems. This ... -
New Method of Hydraulic Performance Evaluation on Emitters with Labyrinth Channels
(American Society of Civil Engineers, 2011)Hydraulic performance of the emitter is crucial in drip-irrigation systems. Considering the limitations of evaluating an emitter’s hydraulic performance, a new method was proposed by using a pressure loss coefficient (PLC) ... -
Salinity Effects from Evaporation and Transpiration under Flood Irrigation
(American Society of Civil Engineers, 2011)Transpiration and evaporation rates from irrigated pastures can be adequately assessed by conventional methods and more recently, by the use of stable isotopes -
Valley Crossings and Flood Management for Ancient Roman Aqueduct Bridges
(American Society of Civil Engineers, 2011)Calculation of stormwater flow passage underneath two ancient Roman bridges supporting an aqueduct in southern France provides insight into the Roman engineers’ design of aqueduct bridges. The bridges are quite different ...