Southeastern Yunnan Panlong River Basin (longtan Village Hydrological Station Above) Land Use Change And Driving Force Analysis

The whole world change studies,with a series of global problem such as population growth,a shortage of grain,environmental pollution,biodiversity,climate change getting intensified,become one of the most active field on the international in recent years.Studing land utilization/land cover change,can deepen the cognition of human activity affecting on the change of the whole world.In our country,land utilization/land cover change study should be more significance,because that the situation is too many people,limited land and waiting to develop economic and people living leval.Under the background,in this paper Pan Long river(above Longtan Zai hydrometric station)was selected as the studying area,theland use data in 1990 and 1999,and DEM were applied,the natural data,social information and economy statistical data in Wenshan city were used,and with the applicationof RS and GIS tcchnique.The author explained the landuse actuality in 1990 and 1999,analyzed the spatial change characters of landuse form 1990 to 1999.At the same time,the author also analyzed the diving forces of land use change in the area by the method of nature and quantity.That makes use of land to provide a decision-making rationally,promotes the area society sustained development with may.The main contents and results of the paper are the several points below:(1)By studing the current land use situation in 1999,the result show that,the total landcover area is 3108.6km~2,firstly the mostly landuse type is woodland which get to 1238.8 km~2,and it account for 39.85%of the totle area.Secondly,cultivatedland,occupy 36.51%of the totle area,water area is 4245ha,it account for 1.36%of the totle area.the building area is 2765ha,it account for 0.89%of the totle area,the unused land is 66475ha,it account for 21.39%of the totle area.(2)In gencral,theland-use change is a little obvious from 1990 to 1999,among these changes,the woodland has the largest change,it has 10173ha in nine years,While the cropland and unusedland types had some extent decrease.The maximal change of landuse in district is the change from cropland to forest land,18762ha cropland change to forest,occupying 15.72%of cropland and second change is that forestland and unused land to cropland,10095ha forest change to cropland,4895ha unused land change to cropland.(3)That analytical result of land change driving force indicates:many factors drive the change of land and the factor of people and economy development is similar to is the main driving factor that changes area land utilization.(4)According to the characteristic,that the main body of the studying area is a hill landform originally,try to discuss the slope impact to land utilization change.Analytical result is indicated:slope has somewhat impact on land government and land use,for example,cropland,water and building distridute in 0 to 8 degree slope.slope has somewhat impact on landtype change,for example,various land utilization type of study area happens mainly on 0 to 8 degree and 8 to 15 degree slope from 1990 to1999.(5)Finally,the thesis puts forward some policy advises from the aspects of population,economy,industry structure,agricultural technic,people consciousness and so on.