Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 2461-2480 of 3826
-
Closure to “Continues Outflow Variation along Irrigation Laterals: Effect of the Number of Outlets” by John D. Valiantzas
(American Society of Civil Engineers, 2003) -
Performance of Rotating Spray Plate Sprinklers in Indoor Experiments
(American Society of Civil Engineers, 2003)The use of rotating spray plate sprinklers (RSPS) can reduce the water and energy requirements in pressurized irrigation systems. Installation of RSPS in continuous move irrigation machines, such as traveling trailers ... -
Estimation of Aquifer Parameters from Pumping Test Data by Genetic Algorithm Optimization Technique
(American Society of Civil Engineers, 2003)Adequate and reliable estimates of aquifer parameters are of utmost importance for proper management of vital groundwater resources. The pumping (aquifer) test is the standard technique for estimating various hydraulic ... -
Discussion of “Continuous Outflow Variation Along Irrigation Laterals: Effect of the Number of Outlets” by John D. Valiantzas
(American Society of Civil Engineers, 2003) -
Comparison of Reference Evapotranspiration Calculations as Part of the ASCE Standardization Effort
(American Society of Civil Engineers, 2003)Comparison among commonly used reference evapotranspiration (ET) equations in the United States and the recently recommended ASCE standardized reference ET equation was made as part of the ASCE standardization effort. ... -
Demand Forecasting for Irrigation Water Distribution Systems
(American Society of Civil Engineers, 2003)One of the main problems in the management of large water supply and distribution systems is the forecasting of daily demand in order to schedule pumping effort and minimize costs. This paper examines methodologies for ... -
Drainage of Sloping Lands with Variable Recharge Model Validation and Applications
(American Society of Civil Engineers, 2003)Semianalytical transient equations describing the behavior of water tables in subsurface drained soils when drains rest on a sloping impervious barrier have been derived previously and represent the bases of the SIDRA ... -
Closure to “Dimensionless Curves for Normal-Depth Calculations in Canal Sections” by K. Babaeyan-Koopaei
(American Society of Civil Engineers, 2003) -
Two-Dimensional Simulation Model for Contour Basin Layouts in Southeast Australia. I: Rectangular Basins
(American Society of Civil Engineers, 2003)Contour basin irrigation layouts are used to irrigate rice and other cereal crops on heavy cracking soils in Southeast Australia. In this study, a physically based two-dimensional simulation model that incorporates all the ... -
Explicit Hydraulic Design of Microirrigation Submain Units with Tapered Manifold and Laterals
(American Society of Civil Engineers, 2003)The optimum hydraulic design problem for microirrigation submain units of specified dimensions is solved analytically. New algebraic equations were derived to calculate explicitly the optimum values of the design variables. ... -
Water Delivery System Planning Considering Irrigation Simultaneity
(American Society of Civil Engineers, 2003)Time should be considered in carrying out the design and management of demand irrigation distribution systems. In this paper, a method to characterize the pumping flow in demand pressurized systems throughout the day and ... -
Two-Dimensional Simulation Model for Contour Basin Layouts in Southeast Australia. II: Irregular Shape and Multiple Basins
(American Society of Civil Engineers, 2003)The development of a two-dimensional simulation model for single regular shape (rectangular) contour basin irrigation layout in southeast Australia is reported in a companion paper. Contour basin layouts as used in Southeast ... -
Predicting Daily Net Radiation Using Minimum Climatological Data
(American Society of Civil Engineers, 2003)Net radiation -
Mapping Root Zone Soil Moisture Using Remotely Sensed Optical Imagery
(American Society of Civil Engineers, 2003)Field-based soil moisture measurements are cumbersome. Remote sensing techniques based on active or passive microwave data have limitations. This paper presents and validates a new method based on land surface energy ... -
Analytical Equation for Variation of Discharge in Drip Irrigation Laterals
(American Society of Civil Engineers, 2003)Statistical uniformity of discharge variation is an important parameter in designing drip irrigation laterals. A simple analytical equation is derived to determine the coefficient of variation of discharge. This equation ... -
Discharge Formulas of Crump-De Gruyter Gate-Weir for Computer Simulation
(American Society of Civil Engineers, 2003)One of the problems of interest to professionals in the field of irrigation and drainage is the computer simulation of discharge or level control structures. Particularly troublesome are structures that display a marked ... -
Application of Ergun Equation to Computation of Critical Shear Velocity Subject to Seepage
(American Society of Civil Engineers, 2003)The Ergun equation that is widely used in chemical engineering is generalized for describing seepage through the sediment boundaries in this study. Comparisons with the measurements of the hydraulic gradient for flows ... -
Discussion of “Interaction of Stream and Sloping Aquifer Receiving Constant Recharge” by A. Upadhyaya and H. S. Chauhan
(American Society of Civil Engineers, 2003) -
Is the Age of Water Development Over?
(American Society of Civil Engineers, 2003) -
Direct Equations for Hydraulic Jump Elements in Rectangular Horizontal Channel
(American Society of Civil Engineers, 2003)Many problems in the design of stilling basins require a knowledge of various elements of a hydraulic jump with known values such as discharge intensity and the energy loss in the jump. Even for a simple case of a rectangular ...