In recent years, limitations linked to traditional urban drainage schemes have been pointed out and new approaches were developed introducing more natural methods for retaining and/or disposing of stormwater. Such practices include infiltration and storage tanks in order to reduce the peak flow and retain part of the polluting components. The impact of such practices on stormwater quantity and ...

Clogging of channels by complex systems such as mixtures of colloidal and biological particles is commonly encountered in different applications. In this work, we analyze and compare the clogging mechanisms and dynamics by pure and mixture suspensions of polystyrene latex particles and Escherichia coli by coupling fluorescent microscopic observation and dynamic permeability measurements in micr...

Adequate infiltration through Permeable Interlocking Concrete Pavements (PICPs) is critical to their hydraulic and stormwater treatment performance. Infiltration is affected by clogging caused by the trapping of fines in the PICP surface, which, over time, reduces treatment performance. Clogging can be reduced by periodic maintenance such as vacuum sweeping and/or pressure washing. Maintenance ...

The infiltration rate and therefore the principal function of a sand based vertical flow constructed wetland (VFCW) is influenced by the content of suspended solids (SS) and chemical oxygen demand (COD) of the waste water supply. In this study there were three operating conditions defined as “No Clogging”; “Partly Clogging” and “Clogging”. Investigations on 21 VFCWs approved analytical differen...

The Düsseldorf waterworks have been using riverbank filtration since 1870 with bank filtration as the most important source for public water supply in this densely populated and industrialised region. There have been many threats to this supply in the last few decades—e.g. poor river water quality, heavy clogging of the riverbed, accidental pollution—which had to be overcome. First field studie...

Raingardens are becoming an increasingly popular technology for urban stormwater treatment, however, their hydraulic performance is known to reduce due to clogging from deposition of finegrained sediments on the surface. This impacts on their capacity to treat urban runoff. It has been recently hypothesised that plants can help to mitigate the effect of surface clogging on infiltration. A conce...

• Potential for AI techniques to detect clayey clogging in pipejacking is explored. Data decomposition into feature-based sub-series accentuates their features. The use of slurry density, torque and speed can be useful detecting clogging. ‘Clogging’ a common issue encountered during tunnelling soils which impede tunnel excavation, cause unplanned downtimes lead significant additional project co...

Abstract Clogging of submerged entry nozzle (SEN) during continuous casting steel is an undesirable phenomenon leading to different problems like flow blockage, slag entrainment, nonuniform solidification, etc. A transient numerical model for clogging based on Eulerian-Lagrangian approach was developed and it covers the main steps clogging: (a) formation first oxide layer by chemical reactions ...

Clogging during excavation is one of the common problems in mechanized excavation. Among influential factors clogging cutter head, we can mention percentage fine soil particles (under 200 mesh sieve), moisture, and type. In this study, to investigate mechanism tunnel laboratory, a machine laboratory simulator was designed built. The features device are its horizontal operation, low rotation spe...

Two-dimensional (2D) hopper flow of disks has been extensively studied. Here, we investigate hopper flow of ellipses with aspect ratio α = 2, and we contrast that behavior to the flow of disks. We use a quasi-2D hopper containing photoelastic particles to obtain stress/force information. We simultaneously measure the particle motion and stress. We determine several properties, including dischar...