*********** 040993A.ENG *********** Country: Japan KEYWORDS: Sand waves, dunes and ripples, dominant wave length, linear stability analysis, suspended sediments, tractive force, bed load. A two part message which is a mathematical treatment "ON THE DOMINANT LENGTH OF SAND WAVES IN THE LOWER FLOW REGIME" by Watanabe, Hirano and Nagy from Saga and Kyushu Universities. Part one contains the ABSTRACT, INTRODUCTION, LENGTH OF SAND WAVES: LENGTH OF DUNES AND RIPPLES; DOMINANT WAVE LENGTH CONCEPT. The next message completes the paper with Characteristics of dominant wave number, Practical formula for wave length, Comparison with Experimental Results, Conclusions, List of Figure Captions, and References. Sand waves are a real problem in major estuaries where they can change the bathymetry significantly at relatively high frequencies. I have seen them record on our 12 KHz fathometer while on station at the mouth of the Amazon. ************** END Msg. A.ENG **************