Acoustic measurement and morphological features of organic sediment deposits in combined sewer networks

Carnacina, Icopo, Larrarte, Frederique and Leonardi, Nicoletta (2017) Acoustic measurement and morphological features of organic sediment deposits in combined sewer networks. WATER RESEARCH, 112. pp. 279-290.

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Abstract

The performance of sewer networks has important consequences from an environmental and social point of view. Poor functioning can result in flood risk and pollution at a large scale. Sediment deposits forming in sewer trunks might severely compromise the sewer line by affecting the flow field, reducing cross-sectional areas, and increasing roughness coefficients. In spite of numerous efforts, the morphological features of these depositional environments remain poorly understood. The interface between water and sediment remains inefficiently identified and the estimation of the stock of deposit is frequently inaccurate. In part, this is due to technical issues connected to difficulties in collecting accurate field measurements without disrupting existing morphologies. In this paper, results from an extensive field campaign are presented; during the campaign a new survey methodology based on acoustic techniques has been tested. Furthermore, a new algorithm for the detection of the soil-water interface, and therefore for the correct esteem of sediment stocks is proposed. Finally, results in regard to bed topography, and morphological features at two different field sites are presented and reveal that a large variability in bed forms is present along sewer networks.

Item Type:	Article
Uncontrolled Keywords:	Sonar profiler, Morphology, Organic sediment, Sewer deposits
Depositing User:	Symplectic Admin
Date Deposited:	24 Apr 2017 08:37
Last Modified:	19 Jan 2023 07:05
DOI:	10.1016/j.watres.2017.01.050
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3007097