SPATIO-TEMPORAL VARIABILITY OF LAND USE CHANGE DRIVING FORCES IN FOSHAN CITY BASED ON GEOSTATISTICS
利用地统计学和半变异函数，研究了1991-2005年佛山市土地利用变化驱动力的时空变异，发现自然驱动力减弱而人类活动驱动力增强，空间分布呈现多极、收敛和组团模式。
The study of spatio-temporal variability of driving forces of land use change is much helpful to make clear its directional and structural differences and formation mechanism.Based on geostatistics and regionalized variable theory,RS,GIS and semivariograms are adopted to research the spatio-temporal variability of land use change driving forces in Foshan City in this paper.The results show that the strong spatial heterogeneity is the main characteristic of the distribution of land use change driving forces whose spatial variability is remarkable in different times;the multiplicity,degree and intensity of land use change driving forces in Foshan City have increased continuously from 1991 to 2005,its spatial distribution has expanded to west and north and jumping-extended to south during the period of 1991 and 2003;it is found that natural driving forces of land use change in Foshan City have decreased but human activity driving forces have enhanced during 1991 and 2005,that there are much more randomicity and instability than ever;the dominant spatial distribution of human activity driving forces have changed from single-side to upright both-sides from 1991 to 2003;the multipolar,convergent and group distribution patterns are appeared during 2003 and 2005.