| Assessment of rationality of land use structure in Gansu Province based on improved TOPSIS method |
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| DOI：10.7606/j.issn.1000-7601.2009.04.45 |
| Key Words: land use structure improved TOPSIS method the rationality assessment |
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| Abstract: |
| The rationality of land use structure was assessed with TOPSIS method based on changing data of land use from 1997～2007 in Gansu Province. The results showed as following: ① During 1999～2007 the rationalitie
s of land use structure were totally high and were all beyond 80%，the rationality of land use structure experienced a fluctuated tendency and that could be obviously divided into three phases, and the land use structure rationality showed an increase in 1997～1999 first, then it had a steady decline in 2000～2002 and was growing rational in 2003～2007 finally. ② The different change of land use types had different effects on the rationality of land use structure; land use types which had a negative correlation with the land use structure rationality we
re garden plot, woodland, residential and industrial land, traffic land and unused land, of them unused land had the most negative correlation with the land use structure rationality; on the other hand, land use types which had a positive correlation with the land use structure rationality included cultivated land, grassland and water, of them grassland had the most positive correlation with the land use structure rationality. ③ It could be decisive to develop unused land and conserve grassland in promoting the rationality of land use structure in Gansu Province. |
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