Fig. 1: Sampling locations at the Xuliujing monitoring section of the Yangtze River Estuary, showing three vertical layers (upper, middle, and lower) and three lateral channels (left, central, and right).
From: Riverine emission of small plastic particles from Yangtze River into the ocean
Surface samples were taken 0.5 m below the water surface, bottom samples 0.5 m above the riverbed, and middle samples from the mid-depth of the central channel.
