ABSTRACT

Gully pots are utilized for conveying runoff to drainage systems, as well as for reducing the system’s solids loading by retaining suspended solids. However, the accumulation of solids in gully pots reduces their removal efficiency, leading to an increase in solids transport towards the drainage system. This article aims to identify the main drivers of the solids accumulation in gully pots and, thus the relevant processes for wash-off models. The solids accumulation rates in 407 gully pots were monitored within a period of ~14 months and were analysed by means of a linear mixed model and a regression tree. The parameters vegetation factor, rainfall volume, and filling degree are the main drivers of the accumulation process. These parameters are linked to the solids build-up in a catchment, solids transport, and solids retention in gully pots, which means that none of these 3 processes is dominant.

摘要

沟渠罐用于将径流输送到排水系统，并通过保留悬浮固体来减少系统的固体负荷。但是，固体颗粒在集水槽中的堆积会降低其去除效率，从而导致固体向排水系统的运输增加。本文旨在确定沟壑内固体堆积的主要驱动因素，从而确定冲洗模型的相关过程。在约14个月的时间内监测了407沟渠中的固体堆积率，并通过线性混合模型和回归树进行了分析。植被因子，降雨量和充填度等参数是累积过程的主要驱动力。这些参数与集水区中的固体物堆积，固体物运输以及在沟渠中的固体物保留相关，