TY - SER TI - Journal of Hydraulic Research. Vol. 29 No. 4 (1991) PY - 0000///[date of publication not identified] CY - Rotterdamseweg : International Association fot Hydraulic Research. N1 - It contains of Papers, Book Reviews and Discussions for 1991 in Vol. 29 No. 4; Air bubble barrier effect on neutrally buoyant objects / Jen-Men Lo. Energy dissipation rate and sediment transport / Chih Ted Yang and Xiangbai Kong. Sediment transport in rigid bed conveyances / R. Mayerle, C. Nalluri and P. Novak. Geometrically simple linear weirs using circular quadrants - bell mouth weirs / K. Keshava Murthy and D. P. Giridhar. Measured and predicted oblique waves in a wave basin / Michael Isaacson and Mark Shaver. Steady gradually accelerating flow in a smooth open channel / A. H. Cardoso, W. H. Graf and G. Gust. The behavior of a single, horizontally discharge, buoyant flow in a non-turbulent coflowing ambient fluid / M. J. Davidson, M. Knudsen and I. R. Wood. River flood hydraulics / W. R. White. Techniques for environmentally sound water resources development / R. Wooldridge ER -