Study On Land Use Change And Eco-Environment Quality In Duolun County Of Inner Mongolia

Selection in duolun county of Inner Mongolia as the research area,1959,1960 and 1975,1977 aerial photograph,6 issue of the land use data in 1987-2015 and 1975,the scale of 1:50 000 topographic map as the main data source,the use of statistical data and the field survey data for many years as a secondary data,using the professional software such as Mapinfo8.5,ArcGIS 10.6 drawing in 1960 and 1975,two photos of land use status quo.Based on the data of the 8th period of land use from 1960 to 2015,this paper analyzed the temporal and spatial variation of land use and the ecological environment quality index of land use and the contribution of land use transformation to the ecological environment by using mathematical statistical analysis,land use transformation matrix and land use dynamic attitude.The research results are as follows.(1)In 1960 and 1975,the land use types in Duolun County,Inner Mongolia occupied the largest proportion of grassland,which was the most important type of land use in the study area.From 1960 to 1975,cultivated land,forest land,water area,construction land and unused land all increased,while grassland area decreased.From 1975 to 1987,the cultivated land,forest land,grassland and unused land area increased,while the water area and grassland area decreased.From 1987 to 1995,cultivated land,forest land,water area,construction land and unused land all increased,grassland area decreased greatly,construction land area increased greatly,and unused land became the largest land use type in the study area.From 1995 to 2000,the area of cultivated land,forest land,grassland,water area and construction land increased,while the area of unused land decreased.From 2000 to 2005,arable land and unused land area decreased,while woodland,grassland and water area increased.From 2005 to 2010,the area of cultivated land,water area,construction land and unused land decreased,while the area of woodland and grassland increased.From 2010 to 2015,the cultivated land,grassland,water area and unused land area all decreased,while forest land,water area and construction land area increased.From 1960 to 2015,duolun County,Inner Mongolia had the most significant changes in forest land,grassland and unused land,the most significant changes in grassland area,the construction land area showed an increasing trend,the woodland area showed a significant growth trend,but the unused land has been decreasing.From 1960 to 2015,the rate of land use change in Duolun County,Inner Mongolia decreased first,then increased and then decreased.(2)The grassland contribution rate in Duolun County,Inner Mongolia in 1960 was the most obvious,and the ecological environment quality was in grade 2.In 1975,the contribution rate of grassland was still the most obvious,and the regional ecological environment quality was in grade 3.In 1987,the regional ecological environment quality was rated at Level 4.In 1995,the regional ecological environment quality was rated at Grade 5.In 2000,the ecological environment quality was ranked level 4.In 2005,the regional ecological environment quality recovered to level 2.In 2015,the regional ecological environment quality was at level 1.(3)From 1960 to 2015,the driving factor for the deterioration of regional ecological environment quality in Duolun County,Inner Mongolia was grassland degradation,which was mainly transformed into sandy land,cultivated land,construction land and unused land,The ecological environment was in a relatively stable state and tended to improve the ecological environment quality.