Turbulence structure and flow field of shallow water with a submerged eel grass patch

摘要: Abstract A flume experiment was conducted to investigate the effect of aquatic herbaceous plant patch on turbulent structure and flow field shallow water. The eel grass that is widely distributed in lakes China chosen as targeted plant. plants were settled form with three groups densities velocities. three-dimensional instantaneous velocities measured using an Audio Doppler Velocitimeter (ADV). results indicate vertical velocity profile exhibits S-shape from canopy root . secondary maximum near observed. intensity increases water surface canopy, then decreases root; there inflection point around where deceases inner region side boundary patch. profiles resistance coefficient C P have different forms at positions general, but are similar along patch, part In area, corresponds Quadrant 2 event (ejection event) above 4 (sweep below bed 1 (outward interaction), coexist. lateral area 3 (inward interaction coexist due presence a strong shear layer.