ABSTRACT

Runoff (re)mobilises solids and their associated pollutants from streets and transports them via gully pots to the drainage system. As the solids negatively impact the performance of the drainage systems, knowledge on the solids loading in terms of mass and composition is essential. However, monitoring data on the solids loading, in particular, covering all seasons and a number of sites, is scarce. This article presents the results of a monitoring campaign on the solids loading to a drainage system via 52 gully pots over a period of 2 years at a sampling rate of once per 3–4 weeks. The loading shows a maximum during the tree phases ‘leaf growth’ and ‘full capacity’ and is correlated with the rain intensity during these phases. The organic fraction and D₅₀ of the solids are correlated with leaf abscission. The settling velocity of the particles <1800 µm is strongly correlated with their organic fraction.

摘要

径流（重新）从街道上收集固体及其相关污染物，并通过沟渠将其运输到排水系统。由于固体会对排水系统的性能产生负面影响，因此必须掌握有关固体质量和组成方面的知识。但是，缺乏有关固体含量特别是涵盖所有季节和多个地点的固体的监测数据。本文介绍了一项监测活动的结果，该监测活动是在2年内以每3-4周一次的采样率，通过52个沟壑将固体排放到排水系统中的结果。在树木阶段“叶片生长”和“满负荷”期间，负荷显示出最大值，并且与这些阶段的降雨强度相关。有机部分和D ₅₀的固体含量与叶片脱落有关。小于1800 µm的颗粒的沉降速度与其有机分数密切相关。