Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 3601-3620 of 3826
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Erratum: “Triangular Side Weirs” by Chandra Prakash Kumar and Santosh Kumar Pathak (February, 1987, Vol. 113, No. 1)
(American Society of Civil Engineers, 1988) -
Rainfall Intensities for Southeastern Arizona
(American Society of Civil Engineers, 1988)Small watershed storm runoff in the southwestern United States is dominated by intense, short-duration convective rains of limited areal extent. Most commonly, flood peak estimates are based on rainfall predictions found ... -
Estimation of Standard Deviation of Potential Evapotranspiration
(American Society of Civil Engineers, 1988)Some weather simulation procedures require mean values of potential evapotranspiration (ETP) and the standard deviations in ETP. For purposes of irrigation planning and design it may be desirable to know the probable ... -
Furrow Advance Using Simple Routing Models
(American Society of Civil Engineers, 1988)Two simple models are developed to predict the advance rate of flow in furrows. The first model is developed using a modified version of Muskingum flood‐routing techniques. The second model is developed by assuming that ... -
Adjusted F Factor for Multiple‐Outlet Pipes
(American Society of Civil Engineers, 1988)An adjusted F factor to compute pressure head loss in pipes having multiple, equally spaced outlets is derived for any given distance from the first outlet to the beginning of the pipe. The proposed factor is dependent on ... -
Performance Functions of Border Irrigation Systems
(American Society of Civil Engineers, 1988)A set of design functions that relate system performance to design variables in graded border irrigation was developed and verified. A dimensional analysis approach is used to combine the independent variables into a reduced ... -
Comparison of Infiltration Measuring Methods for Surface Irrigation
(American Society of Civil Engineers, 1988)Several methods for measuring the rate of infiltration in a volcanic ash soil are compared on the basis of field measurements. Methods that use stagnant water give lower values of soil infiltration rate than those that use ... -
Drip Irrigation and Subirrigation of Sugarcane
(American Society of Civil Engineers, 1988)The difference in sugarcane evapotranspiration (ET), sugarcane yield, and soil moisture content between drip irrigation and subirrigation, are compared using four lysimeters, each 5.5‐m diameter by 1.2‐m deep. Plant cane ... -
Erratum: “Triangular Side Weirs” by Chandra Prakash Kumar and Santosh Kumar Pathak (February, 1987, Vol. 113, No. 1)
(American Society of Civil Engineers, 1987) -
Unimodal Surface Irrigation Efficiency
(American Society of Civil Engineers, 1988)A new concept in surface irrigation efficiency, termed deficit/excess efficiency, is presented; it has potential for use as an objective function for optimization purposes in the design and operation of on‐farm irrigation ... -
Velocity Head Considerations for Trickle Laterals
(American Society of Civil Engineers, 1987)An analytical solution for a trickle lateral is presented which includes velocity head in the basic formulation. The relative error when neglecting velocity head is greater for laminar than for turbulent flow. However, the ... -
Upward Infiltration Equations in Power‐Law Form
(American Society of Civil Engineers, 1987)Equations expressed in explicit power algebraic forms for one‐dimensional upward water movement, cumulative infiltration, and infiltration rate have been derived. These equations are based on three derived consecutive time ... -
Analytical Solution of Simplified Surge Flow Equations
(American Society of Civil Engineers, 1987)The approximate theory of G. B. Witham, proposed in 1955, is often used to initialize numerical computation of border irrigation or a dam-break flood. However, this study shows that the main assumption of a uniform velocity ... -
Effects of Nonlevel Placement on Accuracy of Long‐Throated Flumes
(American Society of Civil Engineers, 1987)Tests were conducted to study the effects of nonlevel placement or construction on the calibration of long‐throated flumes. These flumes have previously been mathematically modeled to provide accurate -
Discussion of “<i>Discharge Characteristics of Flow Past a Floor Slot</i>” by Amruther S. Ramamurthy and Mysore G. Satish (February, 1986, Vol. 112, No. 1)
(American Society of Civil Engineers, 1987) -
Green‐Ampt—Model to Predict Surge Irrigation Phenomena
(American Society of Civil Engineers, 1987)A significant advantage attributed to surge flow irrigation is that for the same volume of water applied the stream will advance farther along the furrow than with continuous flow. Where this advance phenomenon exists, the ... -
Closure to “<i>Discharge Characteristics of Flow Past a Floor Slot</i>” by Amruther S. Ramamurthy and Mysore G. Satish (February, 1986, Vol. 112, No. 1)
(American Society of Civil Engineers, 1987) -
Sprinkler Evaporation Loss Equation
(American Society of Civil Engineers, 1987)The nomograph developed by Frost is widely used to estimate sprinkler evaporation losses. The original data from over 700 tests used to develop the nomograph are apparently lost. An equation is developed to approximate the ... -
Discussion of “<i>Normalized Graphs of Border‐Irrigation Performance</i>” by Theodor Strelkoff and Muhammad Rashid Shatanawi (December, 1984, Vol. 110, No. 4)
(American Society of Civil Engineers, 1987) -
Discussion of “<i>Furrow Irrigation Simulation Time Reduction</i>” by Mohammad Rayej and Wesley W. Wallender (June, 1985, Vol. 111, No. 2)
(American Society of Civil Engineers, 1987)