2000—2020年巍山县土地利用变化的时空格局及其驱动因子研究

Study on Land Use Change and Its Driving Factors in Weishan County from 2000 to 2020

基于巍山县2000—2020年土地利用覆被数据与社会经济统计数据,运用单一土地利用动态度、转移矩阵、土地利用结构信息熵等分析巍山县土地利用时空变化特征,应用主成分分析法从自然条件、社会经济发展和政策影响三个方面分析土地利用的驱动因子。结果表明:2000—2020年巍山县的林地面积最大,占总面积的一半以上,林地面积呈下降趋势;水体和建设用地面积的变化显著,其他地类的变化速度均不高;林地、草地、灌木地之间相互转换,其中2000—2020年耕地持续转变为建设用地,2010—2020年耕地、林地、草地转变为水体的趋势较明显;巍山县土地利用系统的有序性降低,各地类面积占比的差距减小,2010—2020年间减少更明显;社会与经济发展、降水变化是巍山县土地利用变化的主要驱动因子,政策因子在社会与经济发展驱动因子中的比重较大;驱动因子对土地利用变化的作用逐步增强。

Based on the data of land use and cover and socio-economic statistics in Weishan County from 2000 to 2020,the spatial and temporal change characteristics of land use were analyzed by using single land use dynamics,transfer matrix and information entropy of land use structure.The driving factors of land use were analyzed by principal component analysis from 3 aspects:natural conditions,social and economic development and policy influence.The results showed that the area of woodland was the largest,accounting for more than half of the total area,and the forestland area showed a downward trend in Weishan County from 2000 to 2020.The changes of water body and construction land area were the most significant,while the other land types have not changed much.Woodland,grassland and shrubby land were transformed into each other,and arable land has been continuously transformed into construction land,and the trend of farmland,woodland and grassland transforming into water body is also obvious from 2010 to 2020.The order of land use system was decreasing,and the difference of area proportion among different land use type decreasing,especially during 2010-2020.Policy factors have a significant proportion in the driving factors of social and economic development,and the proportion of policy factors in the Social and economic development was larger.The effect of driving factors on land use change was gradually increasing.