Journal of Irrigation and Drainage Engineering: Recent submissions

Now showing items 2921-2940 of 3826

    • Optimal Irrigation Canal Sections 

      Prabhata K. Swamee (American Society of Civil Engineers, 1995)
      The minimum area, or the maximum velocity cross section, is generally adopted for lined irrigation canals. Such a section is economically most efficient because it involves the least amount of earthwork and the least lining ...

    • Rational-Method Equation and HEC TD-15 

      T. V. Hromadka II; R. J. Whitley (American Society of Civil Engineers, 1996)
      The rational-method equation for estimating peak flow rates for storm-water runoff is derived from the balanced-design storm unit hydrograph approach presented in the U.S. Army Corps of Engineers HEC Training Document 15. ...

    • Hydrological Aspects of Bridge Design: Case Study 

      A. Melih Yanmaz; Feridun Coşkun (American Society of Civil Engineers, 1995)
      Many bridges are destroyed or fail completely during severe floods. If the cause of the damage is not a structural deficiency, it may be excessive local scour around bridge piers and/or abutments. Although the mechanics ...

    • Analytical Solutions of Seepage into Ditches from Ponded Fields 

      Gautam Barua; K. N. Tiwari (American Society of Civil Engineers, 1995)
      A steady-state theory is developed for the seepage of ponded water into equally spaced drainage ditches in a homogeneous and anisotropic soil overlying an impervious barrier. Solutions are obtained for two general cases ...

    • Use of Pipelines to Improve Surface Irrigation in Hebei Province, China 

      Robert van Bentum; Ian K. Smout; Xu Zhen Ci (American Society of Civil Engineers, 1995)
      This paper describes the use of buried-pipe systems and flexible surface hoses in Hebei Province, China and their contribution to improved water use and increased management flexibility. Buried-pipe and hose systems ...

    • Geometrically Simple Logarithmic Weir 

      K. Keshava Murthy; H. S. Ramesh; M. N. Shesha Prakash (American Society of Civil Engineers, 1995)
      This paper discusses the design and experimental verification of a geometrically simple logarithmic weir. The weir consists of an inward trapezoidal weir of slope 1 horizontal to

    • Comparison of Methods for Estimating REF-ET 

      D. M. Amatya; R. W. Skaggs; J. D. Gregory (American Society of Civil Engineers, 1995)
      The Penman-Monteith, Makkink, Priestley-Taylor, Turc, Hargreaves-Samani, and Thornthwaite methods were used to estimate reference evapotranspiration (REF-ET) at three sites in eastern North Carolina. The Penman-Monteith ...

    • Modeling Deficit Irrigation in Alfalfa Production 

      Gokmen Tayfur; Kenneth K. Tanji; Brett House; Frank Robinson; Larry Teuber; Gordon Kruse (American Society of Civil Engineers, 1995)
      A conceptual agronomic model EPIC was extended to consider the effects of salinity in alfalfa production under optimal and water stress irrigation conditions. The extended model was calibrated and validated with observed ...

    • Shallow Ground-Water Influence on Salt Budgets for Newlands Project 

      E. P. Chambers; J. C. Guitjens (American Society of Civil Engineers, 1995)
      An adverse relationship between irrigated agriculture and wetlands in arid regions could be mitigated by using recovered shallow ground water for irrigation. Salt and water balances for the Carson Division of the Newlands ...

    • Hydrograph Shape and Border Irrigation Efficiency 

      A. A. Alazba; D. D. Fangmeier (American Society of Civil Engineers, 1995)
      Sloping borders with free outflow were studied to determine the effect of inflow hydrograph shape on maximum application efficiency. A zero-inertia model describing the movement of water along the border run with infiltration ...

    • Field Evaluation of Aquifer-Recharge Model 

      Yiming Li; Shu-Tung Chu (American Society of Civil Engineers, 1995)
      Transport of water-soluble agrichemicals has been intensively studied in the past few years for its use in the protection of ground water from contamination. An accurate description of solute transport is largely based on ...

    • Fate of Nitrogen Applied to Turfgrass-Covered Soil Columns 

      S. K. Starrett; N. E. Christians; T. Al Austin (American Society of Civil Engineers, 1995)
      Current public concern for the environment has focused on the environmental effects of chemical applications to turfgrass areas. There is little research on the environmental effects of nitrogen (N) applied to turfgrasses. ...

    • Aldicarb Transport in Drained Coastal Plain Soil 

      C. L. Munster,; R. W. Skaggs; J. E. Parsons,; R. O. Evans,; J. W. Gilliam; E. W. Harmsen (American Society of Civil Engineers, 1995)
      The pesticide aldicarb is extremely soluble in water, which causes it to be mobile in ground water. A field study was conducted to monitor the fate of aldicarb in a poorly drained soil in the North Carolina coastal plain. ...

    • Alternative Design of Square-Rooting Measuring Device in Open Channel 

      K. Keshava Murthy; M. N. Shesha Prakash (American Society of Civil Engineers, 1995)
      This paper is concerned with the design of a practical quadratic weir of a simple geometrical shape, having an inward trapezoidal weir of crest width 2

    • Hourly Grass Evapotranspiration in Modified Maritime Environment 

      Samuel O. Ortega-Farias; Richard H. Cuenca; M. English (American Society of Civil Engineers, 1995)
      The Penman method using hourly and daily weather data was evaluated to estimate daily reference evapotranspiration over a well-established stand of Alta fescue under different atmospheric conditions. The performance of the ...

    • Evaluation of Evaporation-Pan Networks 

      David A. Chin; Sifang Zhao (American Society of Civil Engineers, 1995)
      A methodology to assess the relative merits of using evaporation-pan networks and semiempirical functions to estimate reference-crop evapotranspiration (ET) is presented. Estimation-error variance is proposed as a basis ...

    • Settlement and Submergence Adjustments for Parshall Flume 

      Steven R. Abt; C. Bradley Florentin; Ana Genovez; Bryan C. Ruth (American Society of Civil Engineers, 1995)
      The Parshall flume was developed nearly 70 years ago to measure open-channel discharge accurately for agricultural applications. When the flume is subjected to numerous wet-dry, freeze-thaw, and heating-cooling cycles, the ...

    • Termiticide Leachate from Building Foundation Drains 

      R. Lee Peyton; Stephen H. Anderson; Clark J. Gantzer (American Society of Civil Engineers, 1995)
      This study determined whether termiticides (insecticides that are formulated and applied for termite control), applied according to label directions to the soil surrounding basement walls, can leach into foundation drainpipes. ...

    • Characterization of Rainfall under Center Pivot: Influence of Measuring Procedure 

      Bernard Bremond; Bruno Molle (American Society of Civil Engineers, 1995)
      A simulation model of rainfall under center pivots was used to elevate center-pivot testing procedures. The model calculates rainfall parameters such as weighted mean and uniformity coefficient for various scenarios including ...

    • Field-Scale Neutron Probe Calibration and Variance Analysis for Clay Soil 

      M. E. Grismer; K. M. Bali; F. E. Robinson (American Society of Civil Engineers, 1995)
      Although widely used for field measurements of soil moisture, problems continue with the use of the neutron probe in clay soils comprised of over 40% clay fractions, and in the determination of the intensity of field ...