Register: Surface roughness (Davenport roughness classification)
stable
URI: http://codes.wmo.int/wmdr/SurfaceRoughnessDavenport
Surface roughness (Davenport roughness classification)
Contents
Name | Notation | Description | Types | Status |
---|---|---|---|---|
Chaotic (City centre with high and low-rise buildings) | chaotic | Centres of large towns with mixture of low-rise and high-rise... | Concept | stable |
Closed (Regular large obstacle COVER (suburb, forest)) | closed | Landscape totally and quite regularly covered with similar si... | Concept | stable |
inapplicable | inapplicable | None of the codes in the table are applicable in the context ... | Concept | stable |
Open (Open flat terrain; grass, few isolated obstacles) | open | Level country with low vegetation (e.g. grass) and isolated o... | Concept | stable |
Rough (High crops; scattered obstacles, 15 < x/H < 20) | rough | Recently-developed 'young' landscape with high crops or crops... | Concept | stable |
Roughly open (Low crops; occasional large obstacles, x/H > 20) | roughlyOpen | Cultivated area with regular cover of low crops, or moderatel... | Concept | stable |
Sea (open water, tidal flat, snow with fetch above 3 km | sea | Open sea or lake (irrespective of the wave size), tidal flat,... | Concept | stable |
Smooth (Mud flats, snow; no vegetation, no obstacles) | smooth | Featureless land surface without any noticeable obstacles and... | Concept | stable |
unknown | unknown | The surface roughness is unknown. | Concept | stable |
Very rough (Parkland, bushes; numerous obstacles, x/H ~ 10) | veryRough | 'Old' cultivated landscape with many rather large obstacle gr... | Concept | stable |