Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 2241-2260 of 3826
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Model for the Simulation of Water Flows in Irrigation Districts. II: Application
(American Society of Civil Engineers, 2006)In a companion paper a model for the simulation of water flows in irrigation districts was formulated. The model combines a series of modules specialized in surface irrigation, open channel distribution networks, crop ... -
Model for the Simulation of Water Flows in Irrigation Districts. I: Description
(American Society of Civil Engineers, 2006)Significant improvements in the profitability and sustainability of irrigated areas can be obtained by the application of new technologies. In this work, a model for the simulation of water flows in irrigation districts ... -
Performance-Based Optimization of Land and Water Resources within Irrigation Schemes. II: Application
(American Society of Civil Engineers, 2006)The area and water allocation model which uses simulation–optimization technique for optimum allocation of land and water resources to different crops cultivated in different allocation units of the irrigation scheme was ... -
Tuning of Robust Distant Downstream PI Controllers for an Irrigation Canal Pool. II: Implementation Issues
(American Society of Civil Engineers, 2006)Based on the companion paper results, this paper presents a robust tuning method to tune a proportional integral (PI) controller that fulfills the design requirements for a single pool with different hydraulic conditions. ... -
Regional Salinity Modeling for Conjunctive Water Use Planning in Kheri Command
(American Society of Civil Engineers, 2006)A one-dimensional water and solute transport UNSATCHEM model is calibrated and validated with a saline water use experiment for wheat and cotton crops. The model is further employed for regional scale salinity modeling ... -
Discussion of “End Depth–Discharge Relation at Free Overfall of Trapezoidal Channels” by A. S. Ramamurthy, Chao Zhai, and Junying Qu
(American Society of Civil Engineers, 2006) -
Closure to “Exact Solutions for Sequent Depths Problem” by Prabhata K. Swamee and Pushpa N. Rathie
(American Society of Civil Engineers, 2006) -
Impact of Agriculture on Water Quality in the North Carolina Middle Coastal Plain
(American Society of Civil Engineers, 2006)Water quality in the Middle Coastal Plain of North Carolina has been impacted by agriculture; however, the water quality impacts in these areas over time have not been studied in detail. The surface water quality of several ... -
Seepage from a Rectangular Ditch to the Groundwater Table
(American Society of Civil Engineers, 2006)This study presents both a numerical and an experimental solution to seepage from a rectangular ditch or elongated pond to a groundwater table of infinite horizontal extent. Because of the unknown location of the free ... -
Broad-Crested Weirs with Rectangular Compound Cross Sections
(American Society of Civil Engineers, 2006)A series of laboratory experiments was performed in order to investigate the effects of width of the lower weir crest and step height of broad-crested weirs of rectangular compound cross section on the values of the discharge ... -
Diagnostic Curve for Estimating Soil Dispersivity and Instantaneously Injected Mass
(American Society of Civil Engineers, 2006)A diagnostic curve is developed for identification of dispersivity and injected mass in case of homogeneous and isotropic soil. The exit concentration from a soil column experiment is diagnostically plotted and matched to ... -
Energy Dissipation on Reinforced Block Ramps
(American Society of Civil Engineers, 2006)Block ramps or rock chutes are stream restoration structures used in many hydraulic projects. If the base material presents stability problems, a reinforcement can be used; it consists of placing over the ramp rocks greater ... -
Optimal Instantaneous Unit Hydrograph from Multistorm Data
(American Society of Civil Engineers, 2006)An optimization method for estimating an optimal smooth instantaneous unit hydrograph (IUH) from multistorm data taken simultaneously is proposed. A gamma IUH is used for representing the analytical IUH. The parameters of ... -
Performance Evaluation of Reference Evapotranspiration Equations across a Range of Indian Climates
(American Society of Civil Engineers, 2006)Reference crop evapotranspiration -
Discussion of “Exact Solutions for Sequent Depths Problem” by Prabhata K. Swamee and Pushpa N. Rathie
(American Society of Civil Engineers, 2006) -
Discussion of “Exact Solutions for Sequent Depths Problem” by Prabhata K. Swamee and Pushpa N. Rathie
(American Society of Civil Engineers, 2006) -
Irrigation Scheduling with Travel Times
(American Society of Civil Engineers, 2006)In preparing water allocation schedules for fields in a lateral unit, the time required for water to travel from one point on a lateral to another can be significant and is dependent on the sequence in which users abstract ... -
Optimal Irrigation Planning under Water Scarcity
(American Society of Civil Engineers, 2006)In this study optimal irrigation planning strategies are developed for the Nagarjuna Sagar Right Canal command in the semiarid region of South India. The specific objective of the study is to allocate the available land ... -
Decreasing Measuring Errors of a Thermal Groundwater Flowmeter
(American Society of Civil Engineers, 2006)The probe of a commercial thermal groundwater flowmeter was evaluated in the laboratory to determine the causes of apparent inaccurate results from field experiments conducted under high groundwater velocities in a gravel ... -
Effectiveness of Bermuda Grass as Vegetative Cover in Grassed Waterway: A Simulated Study
(American Society of Civil Engineers, 2006)An investigation to study the effects of slope and vegetative cover on outflow, sediment concentration, and deep percolation in channels covered with Bermuda grass in an