基于熵权TOPSIS模型的天水市土地利用结构合理性评判

利用天水市1996—2007年土地利用变化调查数据，采用熵权TOPSIS方法对天水市土地利用结构的合理性进行了综合评价。结果表明：①1996—2007年期间天水市土地利用结构合理度总体上较高，均在90％以上，在时间上的变化呈波动趋势，并且可以明显地分为3个变化阶段。②不同土地利用类型的变化对土地利用结构的合理性影响不同，居民点及工矿用地、牧草地、交通用地与土地利用结构合理度的关联度最高。③控制交通用地和居民点及工矿用地的过快增长，严格保护水域，调整牧草地的比例，对优化天水市土地利用结构具有决定性的作用。④该方法计算简便，思路清晰，结果令人满意。适合于土地利用结构合理度评价。图2，表4，参9。

City Based on Coefficient of Entropy and TOPSIS Model

Tbe rationality of land use structure was assessed with coefficient of entropy and TOPSIS method based on changing data of land use from 1996 -2007 in Tianshui City. The results showed：（1）During 1996 -2007 the rationalities of land use structure were totally high and were all beyond 90%, the rationality of land use structure experienced a fluctuated tendency and that could be obviously divided into three phases. （2）The different change of land use types had different effects on the rationality of land use structure;land use types which had a high grey correlation degree with the land use structure rationality were residential and industrial land, traffic land and grassland. （3）It could be decisive to control the excessively rapid growth of construction land and adjust the proportion of grassland in promoting the rationality of land use structure in Tianshui City. （4）The method is simple, and feasible to evaluate the rationality of land use structure.