排水计算器
确定排水管道尺寸
sq ft
in/hr
公式
GPM = Area × Rainfall × Runoff × 0.0104
Rational method for small drainage areas.
示例
1000sqft roof, 2in/hr
≈ 18.7 GPM, 4" pipe.
常见问题
关于 排水计算器
Size drainage pipes for proper water management.
确定排水管道尺寸
Rational method for small drainage areas.
≈ 18.7 GPM, 4" pipe.
Size drainage pipes for proper water management.