Analysis Of Tupu And Research Of Driving Force Of Land-use Change In Karst Mountainous Region

With the improvement of the levels of industrialization and urbanization,the demand of land resources of social and economic development is increasing.Regional ecological and environmental problems caused by the tense relationship between human and nature is serious,especially,in Karst mountainous region where the ecological environment is very fragile,with the various unreasonable land use.Therefore,it is meaningful to realize the harmonious development of regional economy and environment to study the driving force of the land-use change in Karst mountainous area.This paper takes Panxian as a case to analyze TUPU of and research the driving force of land use change by grey correlation method,basing on the theory on TUPU of geological information,with Arcgis10.0,Erdas Imagine9.2 and eCognition8.6 software platform,the conclusion as the following:(1)The land-use types can be divided into farmland,forest,construction land,grassland,garden,water and unused land in Panxian.Among them,the farmland and forest are the most basic and major land-use types,area of 1250.86km2,1939.51km2,account for 78.66% of the total area of Panxian;The area of grass,construction land,garden and unused land are smaller,and account for 6.38%,5.13%,5.95%,3.45% of the total area of the study area;The area of Water is Minimum,account for 0.43% of Panxian.(2)The area of cultivated land is declining in Panxian in 2000-2015,and mainly turned into forest,construction land and garden plot;The area of forest is growing,main source is the cultivated land;The area of construction land is growing,main source is the cultivated land;The area of grassland is the same in general;The eare of garden plot is increasing in the mass,sources for the cultivated land mainly;Water sustainably grows in small,mainly turns from the cultivated land;Unused land is the declining,mainly,turn to the grass.The largest share of types of land-use change forthree temporal units: The main type is the cultivated land turn into forest,accounting for72.37% of the total area of land use change during 2000-2005.The main is cultivated land become into forest,76.28% of the total area of land-use change during 2005-2010.Cultivated land to be forest land and garden is the main change,accounting for 38.54%,32.80% of the total area of land-use change in 2010-2015.(3)For the three timing units,relatively,the land use has a larger change in 2005-2010 and 2010-2015,The proportions of the total area of the study area are 8.18%,10.57%,The change is smaller in 2000-2005,the area of change only accounts for 5.35%of the total area of the study area.Based on the levels of the spatial expansion,the cultivated land is a quick shrinkage type;the forest land is a relatively rapid expansion type;the water area is relatively stable type;construction land is slower expansion type in 2000-2005,the other two timing units are quick expansion type;The grassland is relatively slow expansion From 2000 to 2005,and relatively slow in the other two sequences;The garden polt is relatively stable In 2000-2005,while,it is the slow expansion In 2005-2010,and rapid expansion In 2005-2010;Water is the rapid contraction type in 2010-2015,slowly shrinkage type for the other two timing units;The unused land is shrinking slowly in 2000-2005 and 2005-2010,and is shrinking rapidly during 2010-2015.(4)According to the result of analysis of grey relation : the main driving force factors of land use change are resident population,second and third industry,grain yield,and so on,in Panxian from 2000 to 2015.