Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 2081-2100 of 3826
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Field Testing of a Simple Flume (SMBF) for Flow Measurement in Open Channels
(American Society of Civil Engineers, 2008)In this paper the stage–discharge relationship of a new flume named SMBF (Samani, Magallanex, Baiamonte, Ferro), originally proposed by Samani and Magallanez and tested by Baiamonte and Ferro, for measuring flow discharge ... -
Simple Model for Analyzing Transient Pumping from Two Aquifers with Cross Flow
(American Society of Civil Engineers, 2008)A simple semianalytical model is proposed for calculating the drawdown due to pumping a well tapping two aquifers. The new model can take into account the transient pumping discharge and cross flow between the aquifers. ... -
Volume-Based Imperviousness for Storm Water Designs
(American Society of Civil Engineers, 2008)The concept of low impact development (LID) is to apply decentralized on-site runoff source control to preserve the watershed hydrologic and ecological functions. An integrated layout using bioretention and vegetated ... -
Impact of New Rainfall Patterns on Detention Pond Design
(American Society of Civil Engineers, 2008)A new set of dimensionless rainfall hyetographs has been developed for the state of South Carolina. The new hyetographs show trends similar to those developed recently in other states and in general have milder intensities ... -
Growth and Evapotranspiration of Okra (<i>Abelmoschus Esculentus L.</i>) as Influenced by Salinity of Irrigation Water
(American Society of Civil Engineers, 2008)The effects of irrigation water salinity on growth, yield, and water consumption of okra was investigated with a pot experiment. For this purpose, five irrigation water salinity levels with electrical conductivities of ... -
Simulating Root Water Uptake from a Heterogeneous Vegetative Cover
(American Society of Civil Engineers, 2008)A small body of knowledge exists on the root water uptake (RWU) and evapotranspiration in humid environments having a mixture of natural vegetative cover. In this paper, we assess the impacts of atmospheric conditions and ... -
Alternative Rotational Delivery Scheduling for Better Water Regime in Canal Command
(American Society of Civil Engineers, 2008)A model for modifying the canal delivery schedule during the dry season has been formulated to overcome the problem of low irrigation efficiency in a major irrigation project in India. Phulnakhara Distributary of the Puri ... -
Spatial and Temporal Variation of Manning’s Roughness Coefficient in Furrow Irrigation
(American Society of Civil Engineers, 2008)Manning’s roughness coefficient is one of the input parameters in many surface irrigation simulation models. It affects the velocity of flow and thereby its variation with time and distance along the field length influence ... -
Optimal Design of Pressurized Irrigation Subunit
(American Society of Civil Engineers, 2008)A linear programming (LP) model is presented for optimal design of the pressurized irrigation system subunit. The objective function of the LP is to minimize the equivalent annual fixed cost of pipe network of the irrigation ... -
Sensor-Based Automation of Irrigation on Bermudagrass, during Wet Weather Conditions
(American Society of Civil Engineers, 2008)New technologies could improve irrigation efficiency of turfgrass, promoting water conservation and reducing environmental impacts. The objectives of this research were to quantify irrigation water use and to evaluate turf ... -
Electric Motor Efficiency under Variable Frequencies and Loads
(American Society of Civil Engineers, 2008)This paper details a study performed by the Irrigation Training and Research Center to determine motor performances under varying speeds [induced by a variable frequency drives (VFD) controller] and loads. A further goal ... -
Variability Analyses of Alfalfa-Reference to Grass-Reference Evapotranspiration Ratios in Growing and Dormant Seasons
(American Society of Civil Engineers, 2008)Alfalfa-reference evapotranspiration -
Use of Brink Depth in Discharge Measurement
(American Society of Civil Engineers, 2008)The behavior of free surface flow at a rectangular free overfall is studied experimentally to obtain a relation between the brink depth and the flow rate. A series of experiments were conducted in a tilting flume with wide ... -
Survey of Irrigation Methods in California in 2001
(American Society of Civil Engineers, 2008)Reliable information on irrigation methods is important for determining agricultural water demand trends. Therefore, a study was conducted during 2002 to collect information on irrigation methods that were used by growers ... -
SIMGRO, a GIS-Supported Regional Hydrologic Model in Irrigated Areas: Case Study in Mendoza, Argentina
(American Society of Civil Engineers, 2008)The SIMGRO hydrologic simulation model was extended to include irrigation practice. It could then be used to evaluate the effect of hydrologic changes in an irrigated area in the province of Mendoza, Argentina where, given ... -
Development and Application of Hydraulic Simulation Model for Irrigation Canal Network
(American Society of Civil Engineers, 2008)Improving the performance of the major irrigation projects is one of the economically viable options in meeting the growing water demands and sustaining the productivity of irrigated agriculture under present financial, ... -
Calibration of On-Demand Irrigation Network Models
(American Society of Civil Engineers, 2008)In this study, a new procedure for calibrating on-demand irrigation network models was developed. This procedure used a new objective function called maximum data with a reasonable error (MDRE) for calibrating the network. ... -
Evaluation of Irrigation Canal Maintenance according to Roughness and Active Canal Capacity Values
(American Society of Civil Engineers, 2008)This work assesses the state of maintenance of the concrete-lined trapezoidal canals of the Menemen irrigation system at the end of the Lower Gediz Basin according to the values of roughness -
Expanding Disk Rain Sensor Performance and Potential Irrigation Water Savings
(American Society of Civil Engineers, 2008)Rain sensors (RSs) appear to be a useful tool for water conservation at a relatively low cost. However, little evidence related to RS performance and/or reliability exists. The objectives of this experiment were to: (1) ... -
Residential Water Savings Associated with Satellite-Based ET Irrigation Controllers
(American Society of Civil Engineers, 2008)A mixed landscape irrigation study was conducted on 27 residential sites in Las Vegas to quantify water savings associated with satellite irrigation controllers. Seventeen sites were equipped with evapotranspiration-based ...