Department of Engineering, University of Exeter, North Park Road, Exeter, EX4 4QF, England, UK E-mail:
Dŵr Cymru Welsh Water (DCWW), Linea, Fortran Road, Cardiff, CF3 0LT, Wales, UK.
Water Sci Technol. 2019 Dec;80(12):2381-2391. doi: 10.2166/wst.2020.063.
Water and sewerage companies (WaSC) in the UK are under increasing pressures to improve customer satisfaction. The biggest cause for customer dissatisfaction in the wastewater sector is a service failure caused by a blockage. There is therefore a need to understand the factors which influence blockage processes in order to prevent them. This work demonstrates how preceding rainfall impacts the sewer system of two highly populated regions within South Wales that have differing gradients. The total rainfall, number of dry days and consecutive number of dry days prior to a blockage were investigated using statistical analysis in order to determine the impact that rainfall has on blockages. The results obtained demonstrate the importance that dry weather has on blockage rates in both steep and flat catchments. Future work will incorporate predicted rainfall impact into a proactive maintenance scheduling model.
英国的供水及污水处理公司面临着提高客户满意度的巨大压力。在污水领域，客户最不满意的原因是堵塞导致的服务失败。因此，需要了解影响堵塞过程的因素，以防止堵塞的发生。本工作演示了先前的降雨如何影响南威尔士两个人口密集地区具有不同坡度的污水系统。使用统计分析研究了总降雨量、无雨天数和堵塞前连续无雨天数，以确定降雨对堵塞的影响。所得结果表明，在陡坡和缓坡流域中，干燥天气对堵塞率都有重要影响。未来的工作将把预测的降雨影响纳入到主动维护调度模型中。
