Arya Vijayan

KTH Royal Institute of Technology | KTH · Department of Sustainable Development, Environmental Science and Engineering

The microplastics (MP) pollution has been receiving high attention in recent years, because of the massive amounts of plastics it contributes to the environment. Tyre wear and road wear particles (TWP and RWPs) were identified as major sources of MPs, but the observed data on these particles in urban snow deposits and snowmelt is scarce. To contrib...

Choosing the appropriate sampling strategy is significant while estimating the pollutant loads in a snow pile and assessing environmental impacts of dumping snow into water bodies. This paper compares different snow pile sampling strategies, looking for the most efficient way to estimate the pollutant loads in a snow pile. For this purpose, 177 sno...

Snow deposited in urban areas is exposed to pollutants originating from traffic, wet and dry atmospheric deposition, de-icing chemicals and traction materials. The conventional pollutants found in urban snow include solids (TSS), metals (Zn, Cu, Cd, Pb, etc.), Polycyclic Aromatic Hydrocarbons (PAHs), and chlorides. Microplastics (MPs) are emerging...

The knowledge base concerning microplastics (MPs) in the environment is rapidly developing with the goal of closing the existing knowledge gaps. One of such gaps, the occurrence of MPs in roadside snowbanks in urban areas, was surveyed at 16 sites in two northern Swedish cities, Luleå and Umeå, with the objective of estimating the quantities of MPs...

Laboratory snow melting experiments were conducted with actual late-winter snow samples, collected just before the final snowmelt, in two similar northern Swedish cities, Luleå and Umeå, to investigate releases of the selected heavy metals (HM) (Cu, Pb, Zn, and Cd) and 16 USEPA PAHs from melting snow. Metal concentrations were determined in three f...

An iterative procedure for upgrading water distribution network reliability is proposed by recognizing valve locations. In each iteration, three types of alternatives: (1) an addition of a valve(s) to pipe(s) without a valve; (2) an addition of a parallel pipe to an existing pipe; and (3) an increase in size of newly added pipes, are compared and t...

Pipe failure is a major parameter affecting the reliability of a water distribution network (WDN). A WDN consists of isolation valves which are closed to isolate a failed pipe for repairs. Depending up on the location of valves, a group of pipes termed as a segment gets isolated. Herein, reliability is estimated based on supply shortfall considerin...