甘肃省县区单元城镇工矿用地与二三产业耦合状态的时空变化研究

Spatiotemporal changes of coupling between industrial land and secondary & service industries of Gansu's counties

基于甘肃省2001-2007年分县区城镇工矿用地变化指数和二三产业变化指数测算其二者的耦合度,并根据两种指数的变化方向及大小确定了甘肃省各县区的耦合类型。借助Arcgis平台对各县区耦合度进行分级,并借助重心曲线理论将分级结果进行优化合并。结果表明:1)研究期内甘肃省各县区城镇工矿用地规模变化幅度与二三产业的变化幅度基本吻合,二者均呈现出正向变化;2)甘肃省大部分县区城镇工矿用地与二三产业的耦合度较低,经济发展有赖于城镇工矿用地,但从其变化趋势来看,趋于相对集约和节约的方向发展;3)随着耦合度级别的升高,不同级别的耦合程度差距越来越大,而且随着耦合级别的升高,相应县区的数量不断减少;4)基于重心曲线将耦合度级别图系进行优化合并之后,有效的降低了分级图系的破碎度,将甘肃省城镇工矿用地与二三产业耦合度分为四个区域,甘肃省74%的县区处于较低耦合度区域,表明土地利用粗放,二三产业的发展很大程度上依赖于城镇工矿用地规模的扩大。

The coupling between industrial land and secondary ＆ service industries was calculated based on the change index of industrial land and Secondary ＆ Service industries of Gansu’s counties during 2001-2007 and the coupling types of Gansu’s counties were determined according to the two kinds of index change in direction and size.With the aid of Arcgis platform the various counties of coupling degree were graded,and the classification results were optimized combination with the help of Gravity centers curve theory.The results showed that：（1） The change scope of industrial land and secondary ＆ service industries was fit in Gansu’s every county during 2001-2007 and they showed positive changes.（2） The coupling degree between industrial land and secondary ＆ service industries was low in most of counties.Economic development depended upon the industrial land.But land tended to develop to the direction of being relatively intensive and save.（3） The coupling degree difference of different levels was bigger and bigger,the corresponding number of counties of continuous declined.（4） After the coupling degree level was optimized and merged based on the gravity curve,it effectively reduced the classification of fragmentation and was divided into four regions of coupling degree between industrial land and secondary ＆ service industries.It was showed that 74% of the Gansu province counties was in the lower coupling region,land use was extensive and the development of the two or three industry relied heavily on the expansion of the scale of industrial land.