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Waste disposal

机译：废物处理

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Using a Lagrangian particle tracking model the coastal accumulation of debris from 10 major Chinese and Korean rivers discharging to the seas around the Korean Peninsula is investigated. The amount of debris from each river is proportional to the population over the catchment area of the river and the mismanaged plastic waste (MPW) ratio of the country the river belongs to. The debris generally washes up on the coast near the originating river mouth. When only the debris originating from the rivers on the Korean Peninsula is considered the model results are consistent with the observations for the Korean coast reported in previous studies in that the amount of microplastic and macroplastic are greater near the Han and Nakdong Rivers. The amount of debris from Chinese rivers calculated based on the MPW ratios is 75 times greater than that from the rivers on the Korean Peninsula and if the Chinese rivers are added the model the results differ from the observed patterns. Macroplastic distribution also exhibits a similar discrepancy between the model and observation results if debris from the Chinses Rivers are taken into account. Observed data from Korea's Marine Litter Information System show that the accumulation of foreign-originating macroplastic most of which is Chinese is highest around the southwestern corner of the Korean Peninsula. Debris from the Chinese Yangtze and Yellow Rivers reproduces this observed distribution. Based on the observational data more debris originates from Korea than from foreign sources but Chinese-originating debris is dominant in the model. There are two possibilities for this discrepancy. The first is the presence of sinking due to biofouling; if 50% of the plastic sinks every 20 days or so the model results become similar to the observations. The second is the large difference in the MPW ratios between China and Korea employed in the model. Reducing the Chinese MPW ratio to 25% or lower the model results more closely reflect the observations made along the Korean coast.
机译：利用拉格朗日粒子跟踪模型从10个主要的中国和韩国河流到朝鲜半岛周围的海洋中的沿海积累碎片。每个河流的碎片量与河流集水区的人口成比例，河流属于河流的塑料废物（MPW）比例。碎片一般在源河口附近的海岸上洗净。当只有朝鲜半岛的河流上的碎片被认为是模型结果，与以往的研究中报告的韩国海岸的观察结果一致，因为微塑料和宏观塑料的数量在汉族和纳克河附近更大。根据MPW比率计算的中国河流的碎片量比朝鲜半岛的河流从河流上大75倍，如果中国河流添加了模型，结果与观察到的模式不同。宏观分布在模型和观察结果之间也表现出类似的碎屑，如果考虑过来自Chinses Rivers的碎片，则表现出类似的差异。观察到韩国海洋垃圾信息系统的数据表明，韩国半岛西南部地区的外源性宏观塑料最大的积累。来自中国长江和黄河的碎片再现了这种观察到的分布。基于观察数据，更多碎片来自韩国而不是来自外国来源，但在模型中，中美碎片占主导地位。这种差异有两种可能性。首先是由于生物污染而存在下沉;如果50％的塑料水槽每20天左右，则模型结果与观察结果相似。第二是在模型中雇用的中国和韩国之间的MPW比率差异很大。将中国MPW比例降至25％或降低模型结果，更加密切地反映了朝鲜海岸的观察。

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    《Oceanographic Literature Review》 |2020年第4期|1101-1101|共1页
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