| Popis: |
It is of great significance to analyze the runoff pollution load characteristics of different roof materials to improve the estimation accuracy of urban non-point source pollution loads. Yangzhou City was selected as the study area. There, three types of roofs were chosen for rainfall-runoff monitoring, including a Chinese style tile roof, cement tile roof, and concrete flat roof. The pollutant concentrations, scour law, and first flush effect of the three types of roofs were compared. The results show that the event mean concentration (EMC) of total nitrogen (TN), total phosphorus (TP), permanganate index, and total suspended solids (TSS) in the runoff of Chinese style tile roofs are around 4-9 times that in the runoff of cement tile roofs. The rainfall intensity exhibits stronger effect on the change in pollutant concentrations of runoff from the Chinese style tile roof than that from the cement tile roof. The Pearson correlation coefficients ( |
