Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 2201-2220 of 3826
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NRCS (SCS) Synthetic Curvilinear Dimensionless Unit Hydrograph
(American Society of Civil Engineers, 2006)A continuous time function with two parameters for a curvilinear dimensionless unit hydrograph (CDUH) is derived from the unit hydrograph in the form of a gamma probability density function. This equation is then applied ... -
Closure to “Uniform and Critical Flow Computations” by Ramappa G. Patil, J. S. R. Murthy, and L. K. Ghosh
(American Society of Civil Engineers, 2006) -
Capillarity and Evaporation Exacerbated Seepage Losses from Unlined Channels
(American Society of Civil Engineers, 2006)Steady, essentially two-dimensional, tension-saturated seepage from a flat-bottomed soil channel in an arid environment is studied analytically. Physically, the action of capillary spreading, evaporative drive to the ... -
Modified Kostiakov Infiltration Function: Accounting for Initial and Boundary Conditions
(American Society of Civil Engineers, 2006)The effect of specific initial and boundary conditions is generally not considered when applying the Kostiakov infiltration functions. A methodology is developed to account for changes in water levels and initial soil ... -
Discussion of “Uniform and Critical Flow Computations” by Ramappa G. Patil, J. S. R. Murthy, and L. K. Ghosh
(American Society of Civil Engineers, 2006) -
Considerations for Storm-Water Outfalls off Exposed Coasts
(American Society of Civil Engineers, 2006)There is a worldwide movement for coastal municipalities in developed countries to replace whole series of storm drains with far fewer storm-water outfalls that discharge well offshore. Such an extended-length pipe, passing ... -
Discussion of “Uniform and Critical Flow Computations” by Ramappa G. Patil, J. S. R. Murthy, and L. K. Ghosh
(American Society of Civil Engineers, 2006) -
Operational Cost Benefits Study of Flexible On-Farm Irrigation Supply Systems1
(American Society of Civil Engineers, 2007)Efficient on-farm use of water and labor for all methods requires a water supply flexible in frequency, rate, and duration and under the control of the irrigator at the point of application. For surface irrigation, the use ... -
Discussion of “Simplified Estimation of Reference Evapotranspiration from Pan Evaporation Data in California” by Richard L. Snyder, Morteza Orang, Scott Matyac, and Mark E. Grismer
(American Society of Civil Engineers, 2006) -
Real Local Losses Estimation for On-Line Emitters Using Empirical and Numerical Procedures
(American Society of Civil Engineers, 2006)This paper presents a procedure based on a lateral, where the flow rate of all the emitters and the pressure every -
Soil Hydraulic Properties Affecting Discharge Uniformity of Gravity-Fed Subsurface Drip Irrigation Systems
(American Society of Civil Engineers, 2006)The use of subsurface drip irrigation (SDI) is increasing for many reasons, including its many agronomic advantages and the ability for safe application of wastewater to crops. In contrast to surface drip irrigation, soil ... -
Hydraulic Analysis and Direct Design of Multiple Outlets Pipelines Laid on Flat and Sloping Lands
(American Society of Civil Engineers, 2006)Adequate hydraulic analysis of a multiple outlets pipelines is very important for the design and evaluation of irrigation systems. In this paper, an analytical direct design procedure for a single multiple outlets pipelines ... -
Development of GIS-Based Model to Estimate Relative Reductions in Crop Yield due to Salinity and Waterlogging
(American Society of Civil Engineers, 2006)A model is introduced that utilizes geographic information systems (GIS) to predict relative reductions in crop yield due to salinity and waterlogging at a field-scale by incorporating spatially and temporally variable ... -
Sensitivity Analyses and Sensitivity Coefficients of Standardized Daily ASCE-Penman-Monteith Equation
(American Society of Civil Engineers, 2006)The sensitivity of the standardized ASCE grass-reference Penman-Monteith evapotranspiration (ASCE-PM -
Managing Irrigation for Better River Ecosystems—A Case Study of the Middle Rio Grande
(American Society of Civil Engineers, 2006)The technology of irrigated agriculture has often been controversial. The development agencies would praise its productivity, as only 18% of the world’s cultivated land is irrigated but produces roughly 33% of the world’s ... -
Errors in the Bed Shear Stress as Estimated from Vertical Velocity Profile
(American Society of Civil Engineers, 2006)In this study, errors in determining bed shear stress caused by errors in theoretical bed surface data or roughness size selection using one-point velocity, two-point velocity, or a group of velocity measurements within ... -
Minimum Specific Energy and Critical Flow Conditions in Open Channels
(American Society of Civil Engineers, 2006)In open channels, the relationship between the specific energy and the flow depth exhibits a minimum, and the corresponding flow conditions are called critical flow conditions. Herein they are reanalyzed on the basis of ... -
Estimating Evaporation Using ANFIS
(American Society of Civil Engineers, 2006)Water resources engineering assessment requires simple but effective evaporation estimation procedures, especially from readily measurable meteorological factors. Unfortunately, such approaches are rather scarce in the ... -
Flow Depletion Induced by Pumping Well from Finite Length of Stream
(American Society of Civil Engineers, 2006)A procedure for calculating the flow depletion from a finite length of a stream induced by a pumping well in an adjacent aquifer is developed. Four management cases of finite length of the stream including a basic case are ... -
Optimal Design of Open Channel Section Incorporating Critical Flow Condition
(American Society of Civil Engineers, 2006)The flow at critical condition of an open channel is unstable. At critical condition, a small change in specific energy will cause abrupt fluctuation in water depth of the channel. This is because the specific energy curve ...