Rainwater drainage と roof gutter 選定
Roof drainage 計算, gutter 選定, downpipe 選定 と rainfall intensity data.
rainwaterdrainagesizing計算機
Overview
Engineering reference data for Rainwater Drainage and Roof Gutter Sizing in sanitary drainage.
Key Formulas
Manning's Equation
Open channel flow.
Slope
Hydraulic gradient.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Flow rate | m³/s | |
| Manning roughness | — | |
| Flow area | m² | |
| Hydraulic radius | m |