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