TY - SER TI - Journal of Hydraulic Engineering.. Vol. 117 No. 10 (1991) PY - 0000///[date of publication not identified] CY - New York : American Society of Civil Engineers. N1 - It contains of Papers, Technical Note and Discussions on October 1991 in Vol. 117 No. 10; TECHNICAL PAPERS : Experimental Study of Flow Resistance in Gravel-Bed Rivers / V. Ferro and G. Giordano. Study of Time-Dependent Local Scour around Bridge Piers / A. Melih Yanmaz and H. Dogan Altinbilek. Interactions of Two Settling Spheres: Settling Rates and Collision Efficiency / Mooyoung Han and Desmond F. Lawler. Well-Field Management for Energy Efficiency / BillyJ. Claborn and Ken A. Rainwater. Point-Rainfall Measurement in Terms of Time Interval / S. K. Tan and Y. M. Chiew. Large Water-Hammer Pressures for Column Separation in Pipelines / Angus R. Simpson and E. Benjamin Wylie. Elastic Properties of Pipe Materials during Hydraulic Transients / Magnus Larson and Lennart Jonsson. Spline Interpolations for Water Hammer Analysis / I. A. Sibetheros, E. R. Holley, and J. M. Branski. Vertical Diffusion in Small Stratified Lake: Data and Error Analysis / Midhat Hondzo, Christopher R. Ellis, and Heinz G. Stefan. Stability of Transverse Shear Flows in Shallow Open Channels / V. H. Chu, J.-H. Wu, and R. E. Khayat. Solution of Three-Constraint Entropy-Based Velocity Distribution / D. E. Barbe, J. F. Cruise, and V. P. Singh. DISCUSSIONS : Minimization of Frazil-Ice Production by River-Flow Regulation. Subhash C. Jain and Robert Ettema / Goranka Bjedov. By Darryl J. Calkins, Michael G. Ferrick. Closure by authors. Head Losses at Junction Boxes. Archie J. Johnston and Ray Volker / Willi H. Hager. Closure by authors. ERRATA ER -