基于GOCI数据的黄河三角洲表层悬浮体浓度时空变化特征及影响因素OA

Based on the high spatiotemporal resolution GOCI remote sensing data,we systematically investig-ated the spatiotemporal variation characteristics of surface suspended sediment concentration(SSC)in the Yellow River Delta and its adjacent waters.The coupling mechanisms between SSC evolution and hydrodynamic para-meters(wave height,current velocity fields)are quantitatively explored.Key findings include:SSC exhibits marked seasonal variation with higher values in winter-spring and lower values in summer-autumn.Spatially,a distinct nearshore-high and offshore-low pattern emerges,and the maximum concentrations observed in estuarine zones,western Laizhou Bay,and Gudong coastal waters.The waves significantly modulate SSC,showing an ex-ponential positive correlation between wave height and SSC(R2=0.7).Tidal phase modulates high-SSC transport:southeastward dispersion during flood tide and northwestward retreat during ebb tide;Tidal cyclicity affects SSC magnitude,with greater variability during spring tides where high-current zones coincide with SSC fluctuation hotspots.This study demonstrated that synergistic tide-wave interactions could enhance bed shear stress,thus trig-gering sediment resuspension,which is the primary mechanism governing SSC dynamics during spring tides in the Yellow River deltaic areas.