Authors: Sunny, I., Husband, S.P., Boxall, J.B.

Seasonal Temperature and Turbidity Behaviour in Trunk Mains

Introduction

Seasonal temperature and turbidity behaviour in trunk mains. Explore seasonal temperature's impact on discolouration risk and turbidity in water trunk mains. Findings link temperature to material accumulation and inform proactive operational interventions.

Abstract

This paper explores the impact of seasonal temperature variations on discolouration risk in three similar operational trunk mains supplied from a single water source. Two methods have been applied over a year’s extensive monitoring to investigate the discolouration risk; a) managed periodic hydraulic events and measured response in two mains and b) monitoring the long-term continuous turbidity in a control main. Long-term results show a relationship between seasonal temperature and material accumulation processes, bulk water turbidity and total organic carbon (TOC). This indicates organic content, and therefore likely associated microbial behaviour, is critical for the development of discolouration risk. The findings have operational implications by highlighting effective pro-active interventions may be optimised during the critical discolouration risk periods and that this can be identified by temperature.

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