The runoff flow rate monitoring and water sampling were implemented synchronously. We did not use the data for all the rainfall events for various reasons; for example, some events occurred at night, the data were incomplete, or the equipment failed. The results and discussion are based on an analysis of the water quantity and water quality data from eight rainfall events (Table 1).
Characteristics of the rainfall events
| No. . | Date of rain event MM/DD . | Duration (min) . | Rainfall (mm) . | Maximum intensity (mm/min) . | Average intensity (mm/min) . | Antecedent dry period (days) . |
|---|---|---|---|---|---|---|
| 1 | 06/09 | 93 | 6.6 | 0.8 | 0.07 | 8.04 |
| 2 | 07/05 | 715 | 36.0 | 0.8 | 0.05 | 1.80 |
| 3 | 07/29 | 646 | 13.6 | 1.4 | 0.02 | 0.84 |
| 4 | 08/09 | 51 | 10.2 | 1.4 | 0.20 | 0.64 |
| 5 | 08/14 | 390 | 15.6 | 1.4 | 0.04 | 0.18 |
| 6 | 08/16 | 198 | 57.2 | 2.8 | 0.29 | 1.76 |
| 7 | 08/19 | 753 | 34.6 | 0.2 | 0.05 | 2.27 |
| 8 | 08/23 | 240 | 22.4 | 1.0 | 0.09 | 4.05 |
| Average | 385 ± 284 | 24.5 ± 17.0 | 1.1 ± 0.8 | 0.10 ± 0.09 | 2.45 ± 2.56 | |
| No. . | Date of rain event MM/DD . | Duration (min) . | Rainfall (mm) . | Maximum intensity (mm/min) . | Average intensity (mm/min) . | Antecedent dry period (days) . |
|---|---|---|---|---|---|---|
| 1 | 06/09 | 93 | 6.6 | 0.8 | 0.07 | 8.04 |
| 2 | 07/05 | 715 | 36.0 | 0.8 | 0.05 | 1.80 |
| 3 | 07/29 | 646 | 13.6 | 1.4 | 0.02 | 0.84 |
| 4 | 08/09 | 51 | 10.2 | 1.4 | 0.20 | 0.64 |
| 5 | 08/14 | 390 | 15.6 | 1.4 | 0.04 | 0.18 |
| 6 | 08/16 | 198 | 57.2 | 2.8 | 0.29 | 1.76 |
| 7 | 08/19 | 753 | 34.6 | 0.2 | 0.05 | 2.27 |
| 8 | 08/23 | 240 | 22.4 | 1.0 | 0.09 | 4.05 |
| Average | 385 ± 284 | 24.5 ± 17.0 | 1.1 ± 0.8 | 0.10 ± 0.09 | 2.45 ± 2.56 | |