Pollutant And Sedimentation Dispersion Pattern udIn The Confluence Of Two Rivers

摘要

In addition to river water pollution caused by human activity and industrial activity, also due toudinfluence of natural activities such as volcanic activity that has volcanic ash and cold lava cause riverudpollution in river water at the same deposition. Besides of community activities Surabaya living along theudBrantas River flow contributes to making soil erosion along the river, pollution and deposition also occursuddue to discharge of industrial waste or household waste. This was strengthened with the data from theudMinistry of Environment, Sindo’s magazine on Nopember 7th 2013, "The total number of industries inudEast Java that has the potential to pollute the river there are about 1,004 industries, of that number asudmany as 483 industries located along the Watershed (DAS) Brantas river Surabaya and capacity pollutionudload 35 tons of organic waste a day, but the fact more than 70 tons of organic waste a day ". It becomesudnegative news for the citizens of Surabaya so that the public and the government of Surabaya moreudcareful in taking precaution because almost 96% of the water supply Surabaya Kali is a tributary of theudBrantas river used to PDAM Surabaya, so according to its function, the water must be maintained theudquality of the water and do monitoring in order to remain decent for use. In this research focuses on theudmodeling of pollutant dispersion and sedimentation patterns in the confluence of two rivers by combiningudelements of hydrodynamics using Finite Volume Method QUICK scheme (upwind QuadraticudInterpolation Convective Kinematics) so that the results of this research are expected to helping theudparties involved in maintaining the quality of the Brantas River Surabaya to remain fit for consumptionudand reduce silting of the river.