Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 3581-3600 of 3826
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Extreme Rainfall for Africa and Other Developing Areas
(American Society of Civil Engineers, 1988)Adequate and reliable records of rainfall depth‐duration‐frequency amounts are often not available. Use of estimates of probabilities from limited data can reduce errors due to either underdesign or overdesign of structures ... -
Flood Skew in Hydrologic Design on Ungaged Watersheds
(American Society of Civil Engineers, 1988)The skew of a peak‐discharge frequency curve is an important determinant of the magnitude of events having small exceedance probabilities. Unfortunately, methods for estimating skews for ungaged locations provide highly ... -
Terminology for Describing On‐Farm Irrigation Water Demands
(American Society of Civil Engineers, 1988)A terminology is presented with which all variety of farm irrigation water demands may be identified and described. Only the relationship between the water demands and the conveyance system supplying the water is considered. ... -
Trickle Lateral Hydraulics. II: Design and Examples
(American Society of Civil Engineers, 1988)The trickle lateral analysis described in the companion paper is used to illustrate applications of a new analytical solution in system design. Examples are provided to point out the basic concepts and procedures based on ... -
Inflow‐Outflow Infiltration Measurement Accuracy
(American Society of Civil Engineers, 1988)Furrow infiltration and channel seepage are often measured with inflow‐outflow measurements. Inaccuracy in the flow measurement will cause a larger uncertainty in the calculated infiltration. The infiltration rate determination ... -
Trickle Lateral Hydraulics. I: Analytical Solution
(American Society of Civil Engineers, 1988)An important objective of any trickle system is a uniform distribution of water delivered through the emitters. Computation of flow distribution requires knowledge of the variables such as pressure, flow rate, length of ... -
Method for Analyzing Field Scale Surface Irrigation Uniformity
(American Society of Civil Engineers, 1988)This paper presents a method for describing and evaluating some of the major factors that cause nonuniformity in surface irrigation systems. Methods including the following are presented for statistically combining these ... -
Assessing Impacts of Irrigation on Streamflow
(American Society of Civil Engineers, 1988)A method for assessing the impacts on streamflow resulting from withdrawing water from the stream channel or from shallow wells adjacent to the stream for irrigation is presented. Assessment is based on a detailed study ... -
Venturi Flume of Minimum Space Requirements
(American Society of Civil Engineers, 1988)The flow features of a Venturi flume, constricted with sharp‐edged, thin‐plated elements are investigated. These elements, located at both side walls of a rectangular duct, as are usually found in large municipal sewers, ... -
Furrow Flow Measurement Accuracy
(American Society of Civil Engineers, 1988)The primary source of error in properly calibrated, constructed, and installed flow measurement devices is due to reading error or uncertainty. Head reading uncertainty in small V‐notch flumes and submerged orifices is ... -
Characteristics of Square‐Edged and Round‐Nosed Broad‐Crested Weirs
(American Society of Civil Engineers, 1988)The characteristics of square‐edged and round‐nosed, rectangular, broad‐crested weirs are studied under free‐flow and submergedflow conditions. The discharge coefficient, -
Muskingum Model for Furrow Irrigation
(American Society of Civil Engineers, 1988)A mathematical model, based on volume balance and Muskingum type storage‐discharge relation, is presented for design and evaluation of furrow irrigation systems. Three field data sets from Colorado farms are used to test ... -
Erratum: “Alternative Metric Units for Acre‐Foot and Acre‐Inch” by M.‐L. Quinn (August, 1987, Vol. 113, No. 3)
(American Society of Civil Engineers, 1988) -
Analytical Solutions for Surface Irrigation. II: Variable Infiltration Rate
(American Society of Civil Engineers, 1988)A variable infiltration rate model for surface irrigation is developed. The derivations and the forms of the equations used are similar to the case where the infiltration rate is constant. A mean infiltration rate is assumed ... -
Analytical Solutions for Surface Irrigation. I: Constant Infiltration Rate
(American Society of Civil Engineers, 1988)The general problem of advance and recession of irrigation water on an initially dry surface is formulated using the kinematic‐wave theory. In this part of the study, the infiltration rate is assumed constant in time and ... -
Infiltration from Irrigation Advance Data. I: Theory
(American Society of Civil Engineers, 1988)Laplace transformation, integral, and numerical solution methods to the Lewis and Milne surface irrigation volume balance equation are presented and discussed. Six formulations of the volume balance equation are presented. ... -
Friction Correction Factor For Center‐Pivot Irrigation Systems
(American Society of Civil Engineers, 1988)A friction correction factor (F -
Submerged Flow Characteristics of Throatless Flume
(American Society of Civil Engineers, 1988)The submerged flow discharge characteristics of throatless flumes are derived on the basis of a semi‐empirical analysis. A pressure correction factor is determined experimentally to account for the non‐hydrostatic pressure ... -
Infiltration from Irrigation Advance Data. II: Experimental
(American Society of Civil Engineers, 1988)Laplace transformation, integral, and numerical solutions and six empirical formulations to the Lewis and Milne surface irrigation volume balance equation were evaluated using field and laboratory data. These formulations ... -
Discussion of “<i>Performance of Stationary Gun Irrigation Systems</i>” by Bryan W. Karney and Terence H. Podmore (March, 1984, Vol. 110, No. 1)
(American Society of Civil Engineers, 1988)