.....................지식/표면 거칠기
표면 거칠기 정도
행복해1
2010. 2. 18. 13:58
출처:인터넷
Surface Material | Manning's Roughness Coefficient - n - |
Asbestos cement | 0.011 |
Asphalt | 0.016 |
Brass | 0.011 |
Brickwork | 0.015 |
Cast-iron, new | 0.012 |
Clay tile | 0.014 |
Concrete - steel forms | 0.011 |
Concrete - finished | 0.012 |
Concrete - wooden forms | 0.015 |
Concrete - centrifugally spun | 0.013 |
Copper | 0.011 |
Corrugated metal | 0.022 |
Earth | 0.025 |
Earth channel - clean | 0.022 |
Earth channel - gravelly | 0.025 |
Earth channel - weedy | 0.030 |
Earth channel - stony, cobbles | 0.035 |
Floodplains - pasture, farmland | 0.035 |
Floodplains - light brush | 0.050 |
Floodplains - heavy brush | 0.075 |
Floodplains - trees | 0.15 |
Galvanized iron | 0.016 |
Glass | 0.010 |
Gravel | 0.029 |
Lead | 0.011 |
Masonry | 0.025 |
Metal - corrugated | 0.022 |
Natural streams - clean and straight | 0.030 |
Natural streams - major rivers | 0.035 |
Natural streams - sluggish with deep pools | 0.040 |
Plastic | 0.009 |
Polyethylene PE - Corrugated with smooth inner walls | 0.009 - 0.015 |
Polyethylene PE - Corrugated with corrugated inner walls | 0.018 - 0.025 |
Polyvinyl Chloride PVC - with smooth inner walls | 0.009 - 0.011 |
Steel - Coal-tar enamel | 0.010 |
Steel - smooth | 0.012 |
Steel - New unlined | 0.011 |
Steel - Riveted | 0.019 |
Wood - planed | 0.012 |
Wood - unplaned | 0.013 |
Wood stave | 0.012 |