Research progress of turbulence characteristic parameters in bottom boundary layer

Abstract

Abstract The bottom boundary layer in estuaries and coastal waters is an area where water flows interact with the bottom bed, and its flow structure is very complex. The influence on the bed morphology, energy and material exchange, circulation and other processes can not be ignored. With the rapid development of technology, the measurement methods of the parameters of the bottom boundary layer are more mature, and the measurement and analysis of turbulence are more in-depth. In addition, the study of the bottom boundary layer has a great role in promoting the development of other similar disciplines, and its application value is increasingly obvious. This paper presents the latest progress in the study of turbulent characteristic parameters of the bottom boundary layer in estuaries and coastal waters, including measurement methods, frictional velocity, bottom roughness length and bottom drag coefficient. These achievements are summarized and analyzed, and the shortcomings of the current research are discussed, and the future research is prospected.