JSCE-15m is a rainfall intensity parameter used in Japanese civil engineering and hydrological design that represents the maximum rainfall intensity over a 15-minute period. It’s commonly used in:
Here’s a typical classification table for 15-minute rainfall intensities:
| Intensity (mm/15min) | Classification | Typical Effects |
|---|---|---|
| 0-5 | Light | Minor surface runoff |
| 5-15 | Moderate | Street drainage activated |
| 15-30 | Heavy | Local flooding possible |
| 30-50 | Very Heavy | Urban flooding likely |
| >50 | Extreme | Severe flooding risk |
Return Period Table (typical design values):
| Return Period (years) | JSCE-15m (mm) |
|---|---|
| 2 | 20-25 |
| 5 | 30-35 |
| 10 | 35-45 |
| 25 | 45-55 |
| 50 | 55-65 |
| 100 | 65-80 |
Since this involves somewhat technical specifications used in civil engineering in Japan, I should note that while I’ve provided typical ranges, you may want to verify these values against official JSCE documentation for critical applications.
