1 RESEARCH ON SEDIMENTATION AND ARTICLE SIZE DISTRIBUTION OF URBAN RAINWATER IN BEIJING

Sedimentation is one of the important technology for rainwater utilization and runoff pollution control. In order to design sedimentation facilities properly, the particles ’ size distribution and the physical characteristics must be well known. As noted, since many of pollutants are attached to the solids, removal of particles will also remove many other pollutants. Based on measurement stormwater pollutants from roof, pavement and residential sub-district of Beijing urban areas(1999-2002), the particle size distribution and removal efficiency of suspended solids or turbidity were studied