Characteristics of Shallow Flows in a Vegetated Pool—An Experimental Study

Pools are often observed in gravel-bed rivers, together with the presence of vegetation patches. In present study, a conceptual model gradual varied flow both convective deceleration and acceleration sections has been constructed flume to study turbulent structures. Vegetation patches extended canopies were planted pool order increase thickness boundary layer inside inner zone. The effects different flows (namely decelerating, uniform accelerating flows) along an artificial on velocity, shear stress bursting events have investigated. addition, due occurrence secondary currents shallow streams, characteristics investigated two axes that parallel sidewall flume. results showed application log law should be used care estimate velocity vegetated bed. patch causes Reynolds stress, especially entrance section where decelerates. quadrant analysis reveal sweep ejection most dominant influence over pool; however, contributions outward inward near bed, is decelerating. distribution stream-wise RMS turbulence intensity generally presents convex shape.