Seine Plastic Debris Transport Tenfolded During Increased River Discharge
Seine Plastic Debris Transport Tenfolded During Increased River Discharge
复制标题
河流流量增加导致围网塑料碎片运输量增加十倍
DOI：
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发表时间：
2019
影响因子：
3.7
通讯作者：
J. Gaspéri
中科院分区：
文献类型：
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作者：
T. V. van Emmerik;R. Tramoy;C. V. van Calcar;Soline Alligant;Robin Treilles;B. Tassin;J. Gaspéri
河流将陆地上的塑料废物输送到海洋中。目前量化河流塑料排放的努力具有不确定性，因为现场观测很少。挑战之一是缺乏一致的测量方法，可以在空间和时间上比较河流。最近的研究表明，简单的视觉观测提供了一个强大的一阶特性的浮动和表面悬浮塑料运输，无论是在数量，时空分布和组成。在这项研究中，我们采用这种方法，塞纳河，法国，河流塑料运输的时空变化提供了新的见解。首先，我们研究了塑料流增加河流流量的响应，通过比较在低流量和高流量期间采取的测量。其次，我们调查了河流塑料输运在河流长度上的变化，以提高我们对河流塑料的起源和归宿的理解。我们证明，在较高的河流流量的一段时间内，塑料运输增加到最接近河口的观测点的一个因素10。巴黎上游的塑料运输仅增加了1.5倍，这表明大多数塑料来自巴黎或更下游的地区。通过本文，我们的目标是进一步了解河流塑料运输的季节性变化及其沿着河长的分布，这可能有利于未来的长期监测工作和塑料污染缓解策略。
Rivers transport land-based plastic waste into the ocean. Current efforts to quantify riverine plastic emission come with uncertainty as field observations are scarce. One of the challenging aspects is the lack of consistent measurement methods that allow for comparing rivers over space and time. Recent studies have shown that simple visual observations provide a robust first-order characterization of floating and superficially suspended plastic transport, both in quantity, spatiotemporal distribution and composition. For this study, we applied this method to the river Seine, France, to provide new insights in the spatiotemporal variation in riverine plastic transport. First, we studied the response of plastic flow to increased river discharge by comparing measurements taken during low flow and high flow periods. Second, we investigated the variation of riverine plastic transport over the river length to improve our understanding of the origin and fate of riverine plastics. We demonstrate that during a period with higher river discharge, plastic transport increased up to a factor ten at the observation point closest to the river mouth. Upstream of Paris plastic transport increased only with a factor 1.5, suggesting that most plastics originate from Paris or areas further downstream. With this paper we aim to shed additional light on the seasonal variation in riverine plastic transport and its distribution along the river length, which may benefit future long-term monitoring efforts and plastic pollution mitigation strategies.