Related Experiment Video
Updated: Jul 13, 2026

Preparation of Free-Surface Hyperbolic Water Vortices
Published on: July 28, 2023
Hydrodynamic characterization and interception-entrainment rates of the DSM-flux - a new technology to monitor CSOs
Ainhoa Maté Marín1, Mohamed Omar Laouiti2, Emmanuel Mignot3
1INSA Lyon, DEEP, UR7429, Villeurbanne, 69621, France; Idrica, Xylem Vue, Plaza Legión Española,4, Valencia, 46010, Spain.
Abstract:
Combined sewer overflow structures (CSOs) represent an important source of pollution for the receiving water bodies. A significant amount of pollutants is attached to the suspended solid matter. The DSM-flux is an innovative technology conceived to improve CSO (combined sewer overflow) quantity and quality monitoring and, due to its original geometry, to intercept pollutants bounded to suspended matter. This study aims to evaluate the hydrodynamic behavior and particle interception-entrainment performance of the DSM-flux at small scale in controlled laboratory conditions. Flow patterns and turbulence quantities are measured with precision over the whole device and particles interception and entrainment of solid matter are investigated by means of experimental particle transport tests. The results reveal a clear dependence between the interception efficiency and the inflow rate, this efficiency reaching up to 53.6% under low flow conditions. Moreover, a correlation was observed between the deposition areas in the DSM-flux and the regions with low near-base turbulent kinetic energy values, thereby contributing to the hypothesis of an existing relationship between turbulent kinetic energy and entrainment/deposition phenomena. In-situ observations of a full-scale DSM-flux device during a storm event corroborate the laboratory observations, and confirm the capacity of particles interception by the facility.
More Related Videos
09:22Quantitatively Measuring In situ Flows using a Self-Contained Underwater Velocimetry Apparatus (SCUVA)
Published on: October 31, 2011
08:57VacuSIP, an Improved InEx Method for In Situ Measurement of Particulate and Dissolved Compounds Processed by Active Suspension Feeders
Published on: August 3, 2016
Related Concept Videos
Typical Model Studies
Rapidly Varying Flow
Conservation of Mass in Moving, Nondeforming Control Volume
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
General External Flow Characteristics
Uniform Depth Channel Flow: Problem Solving
Uniform Depth Channel Flow