Data relating microplastics concentrations in stormwater drains to catchment land use and demographics, Perth, Western Australia

The data were collected to test hypotheses that microplastic concentrations in stormwater drains would be able to be predicted from: (1) the proportions of different land uses in stormwater catchments; (2) catchment population and land area; (3) rainfall preceding sample collection. The data show that microplastic fibres were the most common morphology across all drains, followed by fragments. Most microplastics detected were in the 100-530 µm size range, with lower proportions ≤ 25 µm or > 530 µm. The most common colour was black, followed by red, blue, and green with other colours < 5% of total particle counts. There was no statistically significant variation in microplastic concentrations between or within stormwater catchments. Linear mixed-effects models showed significant positive effects of catchment area, catchment population, and the proportion of industrial land, natural land and public open space on microplastic concentrations. The proportion of residential land had a significant negative effect on microplastic concentrations. The proportion of agricultural land in each catchment, and preceding rainfall, had no effect on microplastic concentrations.
The majority of data are presented as a single comma-separated value file with 144 rows representing 3 replicates of 4 size fractions from 12 sampling sites. Samples have unique names and are categorised by Size (4 categories), Drain (6 categories) and Site (12 categories, 2 per Drain). Quantitative data relating to microplastics measurement include: sample volume; raw counts of total microplastics and microplastics separated into fragment, fibre, film, and microbead categories; concentrations of total microplastics and microplastics separated into fragment, fibre, film, and microbead categories; blank corrections (fibres only); corrected raw counts and concentrations of fibres; corrected raw counts and concentrations of total microplastics. Catchment demographic and land use data are: catchment area and population; proportions of land use in residential, industrial, services, agricultural, natural, and public open space categories. Rainfall for the 7 days prior to sample collection is also recorded. A separate comma-separated value file summarises the microplastic colour data, and an image shows aerial photograph maps of each site.

本研究收集的数据旨在验证以下假设：即通过以下因素能够预测城市雨水排水系统中微塑料的浓度：（1）雨水汇集区域不同土地利用的比例；（2）汇集区域的居民人口和土地面积；（3）样本收集前期的降雨情况。研究结果表明，在所有排水系统中，微塑料纤维是最普遍的形态，其次是碎片。检测到的微塑料大多位于100-530微米的尺寸范围内，其中≤25微米或＞530微米的比例较低。最常见的颜色为黑色，其次是红色、蓝色和绿色，其他颜色占总颗粒计数的比例小于5%。在雨水汇集区域之间或内部，微塑料浓度之间并无统计学上的显著差异。线性混合效应模型表明，汇集区域面积、汇集区域人口以及工业用地、自然用地和公共开放空间的占比对微塑料浓度具有显著的正面影响。住宅用地的占比对微塑料浓度具有显著的负面影响。每个汇集区域内的农业用地占比以及前期降雨对微塑料浓度无显著影响。数据主要以单个逗号分隔的值文件呈现，包含144行，代表12个采样点的4个尺寸分数的3个重复。样本具有独特名称，并按尺寸（4个类别）、排水系统（6个类别）和采样点（12个类别，每个排水系统2个）进行分类。与微塑料测量相关的定量数据包括：样本体积；总微塑料和按碎片、纤维、薄膜和微珠分类的微塑料的原始计数；总微塑料和按碎片、纤维、薄膜和微珠分类的微塑料浓度；仅纤维的空白校正；纤维和总微塑料的校正原始计数和浓度。汇集区域的居民人口和土地利用数据包括：汇集区域面积和人口；住宅、工业、服务业、农业、自然和公共开放空间类别中土地利用的比例。还记录了样本收集前7天的降雨情况。另一个逗号分隔的值文件总结了微塑料颜色数据，以及一张图片展示了每个采样点的航空摄影地图。