Analysis On The Evolution And Driving Forces Of Land Use Landscape Pattern In Bengbu City

The landscape pattern of land use is influenced by natural and social factors,which can directly reflect the development of regional natural ecology and social economy,and has gradually become a research hotspot at home and abroad.Bengbu City,as one of the important industrial bases in Anhui Province,has great potential for development.In recent years,the changes of natural environment and human interference are deeply affecting the development direction of Bengbu City.Taking Bengbu City as the object,this paper studies the land use landscape pattern and its driving force of Bengbu City from1995 to 2015 by using RS、GIS and Fragstats technology with the help of the three remote sensing data sources in 1995,2005 and 2015,in order to provide relevant basis for urban planning.The results are as follows:(1)The land use in Bengbu from 1995 to 2015 was mainly manifested in the dominant utilization of cultivated land and the development and transformation of construction land,in which cultivated land was the most varied land category,the area decreased by 19578.51 hm~2;the construction land was the second largest land category,the area increased by 18939.42 hm~2;the forest land,grassland and water area changed little,the forest land and water area increased and the grassland decreased.The transformation mode between land classes is mainly between cultivated land and construction land.Because the total land area occupied by cultivated land is the largest and the proportion is the largest,the area of cultivated land decreases year by year,but it is still the dominant type of land use.In the process of land use change,the contradiction between man and land is becoming more and more prominent,and the pressure of regional land resources utilization is great.(2)The landscape pattern of land use in Bengbu city changed significantly from 1995 to 2015,the landscape has changed significantly.Among them,the type index shows the change of cultivated land and construction land,increased fragmentation of cultivated land landscape,to an irregular distribution,The average patch area of construction land increased,landscape connectivity and increased dominance,tend to concentrate distribution.The horizontal index shows an increase in overall landscape fragmentation,the Shannon diversity index rose from 0.6834 to 0.7422,the evenness index rose from0.4246 to 0.4611,the spread index dropped from 74.9385 to 72.9146,the aggregation index dropped from 97.4050 to 97.3068,the edge density increased from 17.1036 to 17.8332,improved overall landscape diversity and uniformity,Enhanced landscape heterogeneity,each land use landscape type tends to be balanced and stable development.(3)The correlation analysis and principal component analysis of the drivers of land use landscape pattern change in Bengbu city from 1995 to 2015 show that there is a different degree of correlation between natural and social drivers.The development of regional economy and the increase of per capita income greatly affect the distribution and change of land use landscape pattern in Bengbu,while the influence of temperature and precipitation is relatively small.