Water quality improvement in a small stormwater detention pond

The aim of this study was to investigate a small open detention pond predominantly receiving stormwaterdrainage from a highway. The results showed a difference in pollutant removal characteristics. Particle-associatedpollutants were effectively removed during storm events as indicated by EMC (Event Mean Concentrations) whiledissolved pollutants were not effectively removed. Outflow pollutant loads followed linear profiles when sevenconsecutive storm events were represented as cumulative graphs. PEMC\u27s (Partial EMC\u27s) during a storm eventshowed an association between the specific surface area of small particles and lead content. A detention pondshould be designed according to capacity to detain the complete storm volume, thus avoiding short-circuiting ofthe pond by pollutants