Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 2221-2240 of 3826
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Flow Depletion of Semipervious Streams Due to Unsteady Pumping Discharge
(American Society of Civil Engineers, 2006)Analytical expressions for rate and volume of flow depletion of semipervious streams due to sinusoidal variation in pumping rate are obtained. An analytical but approximate method is developed for obtaining the rate and ... -
Sensitivity Analysis of Soil Hydraulic Properties on Subsurface Water Flow in Furrows
(American Society of Civil Engineers, 2006)Knowledge of the sensitivity of various soil hydraulic properties is beneficial for model development and application purposes. It can lead to better estimated values, better understanding, and thus reduced uncertainty. ... -
VOF Model for Simulation of a Free Overfall in Trapezoidal Channels
(American Society of Civil Engineers, 2006)In the past, solutions to open channel flow problems involving free surfaces were generally found on the basis of experimental data or through the development of theoretical expressions using simplified assumptions. The ... -
Discussion of “Ramp Kernels for Aquifer Responses to Arbitrary Stream Stage” by Sushil K. Singh
(American Society of Civil Engineers, 2006) -
Storm-Water Predictions by Dimensionless Unit Hydrograph
(American Society of Civil Engineers, 2006)This paper presents a theoretical derivation of a dimensionless unit hydrograph using the kinematic wave approach. The dimensionless kinematic wave unit hydrograph (KWUH) is normalized by the parameters associated with the ... -
Closure to “Ramp Kernels for Aquifer Responses to Arbitrary Stream Stage” by Sushil K. Singh
(American Society of Civil Engineers, 2006) -
Awards
(American Society of Civil Engineers, 2006) -
Set Sprinkler Irrigation and Its Cost
(American Society of Civil Engineers, 2006)In this study, annual water application costs per unit area (ha) have been analyzed at the level of irrigation subunit in set sprinkler irrigation systems designed with pipes of different materials. In the cost, investment ... -
Calibration of Electromagnetic Induction for Regional Assessment of Soil Water Salinity in an Irrigated Valley
(American Society of Civil Engineers, 2006)Electromagnetic instruments are increasingly being used for in situ analysis and mapping of soil salinity in irrigated soils. This study develops calibration models for salinity assessment over regional scales on the order ... -
Irrigation Potential of the TRASVASE System (Santa Elena Peninsula, Guayas, Ecuador)
(American Society of Civil Engineers, 2006)The objective of this study was to determine the total irrigable area in the Santa Elena Peninsula Water Delivery System (TRASVASE) under several land use scenarios based on a simple water budget model requiring estimation ... -
Assessment of Soil Moisture Dynamics of the Nebraska Sandhills Using Long-Term Measurements and a Hydrology Model
(American Society of Civil Engineers, 2006)Soil moisture, evapotranspiration, and other major water balance components were investigated for six Nebraska Sandhills locations during a 6 year period (1998–2004) using a hydrological model. Annual precipitation in the ... -
Parameter Estimation for the Nonlinear Muskingum Model Using the BFGS Technique
(American Society of Civil Engineers, 2006)In the past, various methods have been used to estimate the parameters in the nonlinear three-parameter Muskingum model to allow the model to more closely approximate a nonlinear relation compared to the original two-parameter ... -
Instantaneous Unit Hydrograph Evaluation for Rainfall-Runoff Modeling of Small Watersheds in North and South Central Texas
(American Society of Civil Engineers, 2006)Data from over 1,600 storms at 91 stations in Texas are analyzed to evaluate an instantaneous unit hydrograph (IUH) model for rainfall-runoff models. The model is fit to observed data using two different merit functions: ... -
Nonlinear PLS Method for Side Weir Flows
(American Society of Civil Engineers, 2006)Side weirs are flow-regulating devices commonly encountered in hydraulic engineering. In the past, the discharge coefficient for flow past a side weir was investigated experimentally by many researchers. In this study, a ... -
Performance-Based Optimization of Land and Water Resources within Irrigation Schemes. I: Method
(American Society of Civil Engineers, 2006)Optimum land and water allocation to different crops grown in different regions of an irrigation scheme is a complex process, especially when these irrigation schemes are characterized by different soils and environment ... -
Productivity and Equity of Different Irrigation Schedules under Limited Water Supply
(American Society of Civil Engineers, 2006)Some irrigation schemes with limited water supply in Central and Southern India follow the area proportionate water distribution based on assumed uniform characteristics of the command area (planned schedule). However in ... -
Tuning of Robust Distant Downstream PI Controllers for an Irrigation Canal Pool. I: Theory
(American Society of Civil Engineers, 2006)The paper proposes a new method to tune robust distant downstream proportional integral (PI) controllers for an irrigation canal pool. The method emphasizes the role of gain and phase margins in the controller design, by ... -
Efficient Solution of the Coupled One-Dimensional Surface—Two-Dimensional Subsurface Flow during Furrow Irrigation Advance
(American Society of Civil Engineers, 2006)Physically based modeling of the coupled one-dimensional surface and two-dimensional (2D) subsurface flow during furrow irrigation advance often causes numerical instabilities and nonconvergence problems. This is particularly ... -
Economic Analysis of an Irrigation System for Liquid Manure Application
(American Society of Civil Engineers, 2006)Irrigation application of effluent from lagoon based systems is an important aspect of animal manure management in swine rearing facilities. This paper describes a procedure for obtaining least-cost components and operational ... -
Closure to “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)