Journal of the Irrigation and Drainage Division. Vol. 117 No. 6 (1991). 

 - New York : American Society of Civil Engineers.  [date of publication not identified] 
 - p. 
<br/><br/> It contains of Papers, Note and Discussions for 1991 in Vol. 117 No. 6. 
<br/><br/>TECHNICAL PAPERS : Dripper-Clogging Factors in Wastewater Irrigation / Avner Adin and Mollie Sacks. Design of Rectangular Open-Channel Expansion Transitions / Prabhata K. Swamee and Bharat C. Basak. Numerical Modeling of Two-Dimensional Transient Flow to Ditches / Saleem Ahmad, Deepak Kashyap, and B. S. Mathur. Design of Irrigation Canals: Integrated Approach / Emad H. Imam, Abdallah S. Bazaraa, and Ashraf S. Zaghlool. Surface-Slope Effects on Sprinkler Uniformity / A. A. Soares, L. S. Willardson, and J. Keller. Simple Methods for Predicting Flow to Drains / G. Fipps and R. W. Skaggs. Multicriterion Strategic Planning for Improved Irrigation Delivery. I: Approach / Timothy K. Gates, Walter E. Heyder, Darrell G. Fontane, and Jose D. Salas. Multicriterion Strategic Planning for Improved Irrigation Delivery. II: Application / Walter E. Heyder, Timothy K. Gates, Darrell G. Fontane and Jose D. Salas. Investigation of Precipitation Droughts by Use of Kriging Method / Tiao J. Chang. Precipitation Distributions and Green-Ampt Runoff / J. A. Van Mullem. TECHNICAL NOTE : Application of Least-Squares Land Leveling / N. A. Gebre-Selassie and L. S. Willardson. DISCUSSIONS : Nonlinear Steady State Seepage into Drains. Salihu Mustafa and N. A. Rafindadi / George Terzidis and D. Karamouzis, Zekai Sen. Closure by authors. Infiltration Function from Furrow Stream Advance. William R. DeTar / Fadrique Otero. Accuracy of Estimated Reference Crop Evapotranspiration. George H. Hargreaves / D. W. Meek and C. J. Phene. Closure by author. Design of Hydraulic Jump Chambers. Scott F. Korom, Simsek Sarikelle, and Andrew L. Simon / Willi H. Hager. Closure by authors. ERRATA. END OF YEAR INDEX.