波浪作用下沙纹平衡波长经验预测研究综述OA

Sand ripples are crucial geomorphic features presented in estuarine and coastal areas.Generated by the interaction between near-bed hydrodynamics and sediment transport,they exert a significant influence on flow turbulence,near-bed sediment transport,and bed roughness.Under the continuous wave action,sand ripples reach an equilibrium geometry defined by their wavelength,height,and steepness.This equilibrium shape depends on factors such as the wave orbital diameter,the median grain size of sediment,and wave peri-od.Over the past 100 years,researchers have conducted extensive studies on the equilibrium shape of sand ripples under wave action,and proposed numerous empirical prediction formulas based on different parame-ters.This study systematically reviews the existing characteristics of the equilibrium geometry of sand ripples and related empirical predictions,compares their predicted results with historical data from field measurements and physical model tests,and puts forward relevant suggestions for future research directions.