New Delhi, March 19 -- The appearance of froth in the stretch of the Yamuna near Kalindi Kunj has been linked to structural and flow conditions at the Okhla barrage, said Delhi's irrigation and flood control minister Parvesh Verma on Wednesday. The minister inspected the river, accompanied by environmental experts from IIT-Delhi, officials from Delhi Jal Board and representatives from other departments. Experts highlighted that the froth formation is localised and largely linked to the structural and flow conditions at the Okhla barrage, officials said. Due to the slope of the barrage, water falls with force creating turbulence. This agitation causes existing impurities in the water to turn into visible foam, which is primarily seen on this particular stretch, they said. "What we are seeing here is a localised phenomenon. The froth formation in this stretch is linked to specific technical conditions at the barrage," the minister said after the inspection. Officials explained that the presence of surfactants, largely from household detergents, contributes to the froth. htc...