136
Manning Roughness Coefficients
Lined or Built-up Channels
Metal
Smooth steel surface
Painted
0.011
0.012
0.014
Unpainted
0.012
0.013
0.017
Corrugated
0.021
0.025
0.030
Non-metal
Cement
Neat surface
0.010
0.011
0.013
Mortar
0.011
0.013
0.015
Concrete
Trowel finish
0.011
0.013
0.015
Float finish
0.013
0.015
0.016
Finished, with gravel on bottom
0.015
0.017
0.020
Unfinished
0.014
0.017
0.020
Wood
Planed, untreated
0.010
0.012
0.014
Planed, creosoted
0.011
0.012
0.015
Unplaned
0.011
0.013
0.015
Plank with battens
0.012
0.015
0.018
Brick
Glazed
0.011
0.013
0.015
In cement mortar
0.012
0.015
0.018
Masonry
Cemented Rubble
0.017
0.025
0.030
Dry Rubble
0.023
0.032
0.035
Non-metal
Asphalt
Smooth
0.013
0.013
------
Rough
0.016
0.016
------
Vegetal Lining
0.030
------
0.500
Excavated or Dredged
Earth, straight and uniform
0.016
0.022
0.035
Earth, winding and sluggish
0.023
0.030
0.040
Rock cuts
0.030
0.040
0.050
Unmaintained channels
0.040
0.070
0.140
Natural Channels (Minor streams, top width at flood 100 ft.)
Fairly regular section
0.030
0.050
0.070
Irregular section with pools
0.040
0.070
0.100
Содержание Sigma 950
Страница 2: ......
Страница 6: ...4...
Страница 20: ...18 Introduction...
Страница 34: ...32 Basic Programming Setup...
Страница 50: ...48 Sensor Installation...
Страница 82: ...80 Maintenance...
Страница 83: ...81 Appendix A Program Flow Charts Figure 22 Overview of Basic Program Menus...
Страница 84: ...82 Program Flow Charts Figure 23 Setup Flow Chart...
Страница 85: ...83 Program Flow Charts Figure 24 Options Flow Chart...
Страница 86: ...84 Program Flow Charts Figure 25 Alarms Menus Flow Chart...
Страница 87: ...85 Program Flow Charts Figure 26 Calibration Menus Flow Chart Page 1...
Страница 88: ...86 Program Flow Charts...
Страница 102: ...100 Programming Features...
Страница 106: ...104 Primary Devices Head Measurement Locations...
Страница 126: ...124 SCADA Modbus System Guidelines...