通过个案工作和研究,纤维已被发现具有特别有用的持续和保持可利用的能力浸没后。然而,对持久性能力的直接分析仍处于早期阶段,特别是,一天以上的潜水时间还没有得到彻底的研究。这项研究旨在扩展对流量和长达28天的淹没期的影响的理解。研磨共混的聚酯/棉生织物以增加转移,然后在黑色棉基材上拖动。然后将这些底物的六个重复以各种流速浸没在人工流动池中28天。这些在紫外线下照射并在浸没前拍照,在潜水期间和潜水后的设定时间。另一组六个重复进行了成像,浸入河中,然后在28天后恢复并重新成像。然后使用这些照片计算纤维的数量,并应用了单向和双向方差分析测试,结合Tukey的HSD,检测不同时间和流速类别的显著差异。损失主要发生在前24小时内,与以前的工作一致。然而,与以前的工作不同,有一个缓慢的,在淹没期的平衡期间大约是对数损失。虽然流量类别之间存在显著差异,流量和持久性之间没有明确的关系.实验室样品可以很好地预测河流样品的行为。从未观察到100%光纤损耗,而最大值为95.45%。这些结果扩展了对水下基材上纤维持久性的理解,超出了先前文献中的较短浸没时间。并对流量的影响有了更深入的了解。
Through both casework and research, fibres have been found to have the particularly useful ability to persist and remain exploitable after
submersion. However, direct analysis of the persistence ability remains in early stages, and in particular,
submersion times above a day have not been thoroughly studied. This study aims to both extend understanding of the impact of flow rate and
submersion periods of up to 28 days. A blended polyester/cotton green fabric was abraded to increase transfer and then dragged over a black cotton substrate. Six replicates of these substrates were then submerged in artificial flow cells at various flow rates for 28 days. These were illuminated under UV light and photographed prior to
submersion, at set times during
submersion and after
submersion. Another set of six replicates were imaged, submerged into a river and then recovered and re-imaged after 28 days. The population of fibres was then counted using these photographs, and a mix of one-way and two-way ANOVA tests were applied, in combination with Tukey\'s HSD, to detect significant differences across time and flow rate categories. Loss predominantly occurred on within the first 24 hours, in agreement with previous work. However, distinct from previous work there was a slow, approximately logarithmic loss over the balance of the submersion period. While significant differences were found between flow categories, there was no clear relationship between flow rate and persistence. The behaviour of the river samples was well-predicted by laboratory samples. 100 % fibre loss was never observed, with the maximum instead being 95.45 %. These results extend the understanding of fibre persistence on submerged substrates beyond the short submersion times in previous literature, and provide some deeper understanding of the impact of flow rate.