Study On Land-Use Change And Its Driving Forces In Horqin Sand Land

In this paper,the study area is the Da Liushu forest farm in the Naiman county of Inner Mongolia Tongliao City in South-central in Horqin sand land.This research area using RS and GIS technology and based on the basis of information of TM / ETM + remote sensing data of 1992,1997,2002,2007 four-year phase.It is combined to the kind of field investigation and relevant statistical data,and through the qualitative and quantitative analysis,this paper is studied the land use and vegetation types for the dynamic monitoring of research;its revealed the land use and vegetation types of the dynamic change trend,and discussed the driving factors about the land use and vegetation types.So that it's provided the theoretical basis of ecology to the ecological environment in the region and restoration of vegetation.The main conclusions are as follows:1.Based on the TWINSPAN classification and DCA ordination,and effectively integrated into the image plaque about the area＜500m²,arise the following types of land-use:1) Agg.Pennisetum centrasiaticum- annual herbage 2) Ass.A. Halodendron- annual grasses association 3)Artemisia halodendron+Salix gordejevil+Lespedeza hedysaroides- annual grasses association 4)Artemisia halodendron-Artemisia scoparia+perennia 5) lakes.6) Cultivated Land.7) woodland.8) Residential Points.9) exposed sand.10) Saline land.11) Wetland Vegetation 12)Rivers 13)others2.The change of land-use and its dynamic features in the study area indicated that:1) At different times of comprehensive dynamic degree of land use were 5.94 (1992-1997),6.24(1997-2002),6.71(2002-2007),and its indicates that the extent of land-use change increased with time;2) Structural changes in land-use were indicated that:The land-use types into the phenomenon of cultivated land with varying degrees,areas of cultivated land was 4999.32 hm² in 1992,and it reached 19655.42 hm² in 2007.The areas of Residential Points were increased from 1963.78 hm² in 1992 to 3278.60hm² in 2007.Areas of other types were decreased.3) The change ratio of land- use R was bigger than zero,which indicated that land use was in developing period.3.Driving factor in research area can be summarized as natural geography factor and socioeconomic factor.There were significant correlation between Cultivated Land areas and socioeconomic factor.Through Regression Analysis,the Imitate the Linear Relationship between Cultivated Land areas and socioeconomic dynamic factor about Demographic factors,level of economic development and people's living standards.Regression equation established by the principal Component Analysis between cultivated land areas and dynamic factors as follows: y=0.075X₁+0.061X₂+1.0785E-06X₃+9.8031E-06X₄+2.111E-05X₅+1.346E-06X₆+ 2.619E-06X₇+3.331E-05X₈+3.910E-06X₉+2.265E-06X₁₀+4.460E-06X₁₁-0.168X₁₂-1.8586 The above-mentioned studies have shown that in the years 1992-2007,the socio-economic factors is an important dynamic factors about changes area of cultivated land areas,and the role of natural factors are not obvious.