Prototype monitoring and numerical simulation of roof gutter systems

Escarameia, M. and Swaffield, J. (1999) Prototype monitoring and numerical simulation of roof gutter systems. Proc. of 8th Int. Conference on Urban Storm Drainage, Sydney, Australia, August 30-September 3, 1999.

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In the UK guidance on the design of conventional roof drainage systems is given in British Standard BS6367:1983: “Drainage of roofs and paved areas”. The hydraulic design of roofs recommended in this document has a sound experimental and theoretical basis but also includes some assumptions that required site verification. This was carried out by means of a monitoring programme, which took place during 13 months and involved the continuous recording at two different sites of the amount of rain falling directly on the roofs, and of water depths at upstream and downstream sections of the roofs’ gutters. The analysis of the data consisted of the investigation of the following aspects: typical storm durations, time of concentration, percentage runoff, depression storage and effect on runoff of wind speed and direction. Comparisons were also made between the site measurements and the results of a computer-based simulation developed at Heriot-Watt University, which solves the St. Venant equations of momentum and continuity for unsteady free surface gutter flow. The paper presents important new data for the design of rainwater systems and concludes that numerical simulations of unsteady flows are a useful tool for complementing the design recommendations in current design guides.

Item Type: Article
Subjects: Water > Urban infrastructure
Water > General
Depositing User: Unnamed user with email
Date Deposited: 02 Apr 2020 09:45
Last Modified: 19 May 2020 13:41

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