Table 5. Correlations between EMCs, FF 40, rainfall and catchment characteristics.
The characteristic parameters of rainfall | Catchment characteristics | |||||||
---|---|---|---|---|---|---|---|---|
Parameter | Type of pollutants | I max5 | I | ADD | R Dur | R D | CA | IMR |
EMC | COD | 0.015 | 0.417* | 0.058 | -0.115 | 0.115 | -0.19 | 0.66** |
TSS | 0.041 | 0.395* | 0.088 | -0.169 | 0.076 | -0.12 | 0.67** | |
TN | 0.414* | 0.402* | 0.167 | 0.124 | 0.297 | -0.30 | 0.58** | |
TP | 0.271 | 0.466** | 0.101 | -0.067 | 0.157 | -0.22 | 0.48** | |
FF 40 | COD | 0.462* | 0.34 | 0.462* | 0.34 | 0.454* | -0.10 | 0.02 |
TSS | 0.486* | 0.341 | 0.286 | 0.12 | 0.332 | 0.05 | 0.25 | |
TN | 0.416* | 0.319 | 0.377* | 0.273 | 0.415* | -0.35 | -0.10 | |
TP | 0.394* | 0.237 | 0.24 | 0.223 | 0.351 | -0.16 | 0.20 |
I max5: Max 5-min intensity,
I: Mean rainfall intensity,
R Dur: Rainfall duration,
R D: Rainfall depth,
ADD: Antecedent dry days,
CA: Catchment area,
IMR: Impervious rate.
**: P values<0.01,
*: P values <0.05.