云南省耕地垂直空间转移规律及其驱动力分析

在ArCGIS中利用1986、2000年2期土地利用变化遥感调查数据、云南省数字地形模型（DEM）及2005、2007年云南土地利用变更调查数据来分析云南耕地的垂直空间转移规律,并用SPSS来分析驱动耕地垂直空间转移的主要因素。结果表明,云南耕地有从地面坡度小的坝区及地面坡度〉25°的陡坡地向缓坡区及中坡度区转移的趋势;影响耕地垂直空间转移的主要因子是政策及政府行为;坡度、经济水平、人口对耕地变化有影响,但不是耕地垂直空间转移的主要驱动力,其影响力不明显且随坡度的增加而减小。

A Study on Vertical Spatial Transfer of Cultivated Land in Yunnan Province from 1986 to 2008

Based upon ArCGIS,the vertical spatial transfer law of cultivated land in Yunnan was studied through referring to three periods of remote sensing data of Land-Use and Land-Cover Change(LUCC) in Yunnan in 1986,1995 and 2000,Digital Elevation Model(DEM) of Yunnan Province and LUCC data in Yunnan from 2000 to 2008.The main factors that promote vertical spatial transfer law of cultivated land were analyzed by using SPSS,and the influence of policies and government acts upon the change of cultivated land was clarified.The findings indicated that for Yunnan cultivated land there is a trend that in the vertical direction steep slope areas and gentle slope areas divert into mid-slope areas.The primary factor influencing the vertical spatial transfer of cultivated land was policies and government acts.Also,the gradient of ground,total population and number of agriculture employed persons were also main factors in influencing the change of cultivated land,whose influence was obviously below policies and government acts.