Research Article
Effects on Local Temperature and Energy of Oasis City Expansion in Arid Area of Northwest China
Table 2
Morphometric parameters and the physical properties of city elements in the modelling.
| | 1978 | 1993 | 2004 | 2014 |
| Land cover fraction | C3 crop | 47.09 | 59.46 | 46.51 | 44.00 | Sparse desert plant | 49.99 | 20.43 | 13.58 | 10.45 | ISA | 2.92 | 20.11 | 39.91 | 45.55 |
| Morphometric parameters | Mean building height | 10 | 10 | 20 | 30 | Height/width | 1 | 1 | 2 | 3 |
| Road properties | Main materials | Asphalt, concrete | Asphalt, concrete | Asphalt, concrete | Asphalt, concrete | Albedo | 0.08 | 0.08 | 0.08 | 0.08 | Emissivity | 0.94 | 0.94 | 0.94 | 0.94 | Roughness length | 0.05 m | 0.05 m | 0.05 m | 0.05 m |
| Roof properties | Main materials | Asphalt, mortar, concrete | Asphalt, mortar, concrete | Asphalt, mortar, concrete | Asphalt, mortar, concrete | Albedo | 0.14 | 0.14 | 0.14 | 0.14 | Emissivity | 0.90 | 0.90 | 0.90 | 0.90 | Roughness length | 0.15 m | 0.15 m | 0.15 m | 0.15 m |
| Wall properties | Main materials | Plaster, concrete, brick | Plaster, concrete, brick | Plaster, concrete, brick | Plaster, concrete, brick | Albedo | 0.14 | 0.14 | 0.14 | 0.14 | Emissivity | 0.90 | 0.90 | 0.90 | 0.90 |
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