Temporal And Spatial Dynamic Change And Driving Forces Analysis Of Vegetation Coverage In Jiujiang City

Vegetation and human development and survival are closely related,se riously affecting the sustainable development of mankind.Monitoring of vegetation cov erage is a long-term focus of human problems.The growth and development of vegetati on is closely related to the external environmental factors.The spatial and temporal patt erns of vegetation can be analyzed by selecting different factors,and the potential factor s of vegetation change can be more effective to protect the stability of ecological enviro nment?Based on the Landsat remote sensing image of 2000,2005,2010 and 2015,the vegetation distribution of Jiujiang City was extracted and analyzed by standard deviatio n analysis method,transfer matrix method,difference method Analyze the evolution of vegetation in space and time.Combined with climate and topographic factors to conside r the evolution of vegetation in time and space.The study yielded the following results:(1)The vegetation coverage in the study area in 2000 was the highest in the middle and high vegetation coverage,accounting for 74% of the total vegetation coverage.In 2005,the vegetation coverage in Jiujiang City was mainly covered with high vegetation c overage and more than 60% More than the overall 2/3;2010 and 2015 and 2005 distribu tion trend similar.(2)The stability of the vegetation in the study area is stronger and middle and wea k in the whole angle.The stability of the vegetation in the whole study area is strong,an d the fluctuation of the vegetation is not great.During the period from 2000 to 2015,the coverage of low vegetation was reduced by 1104 square kilometers,the vegetation cov erage was reduced by 1302 square kilometers,the coverage of high vegetation increased by 3467 square kilometers,and the coverage of total vegetation increased by 7340 squa re kilometers.(3)The correlation coefficient between vegetation and temperature of Jiujiang City was 0.2416,which was low with the correlation coefficient of mean temperature,tempe rature difference and precipitation climatic factor,and the correlation coefficient betwee n vegetation and precipitation was-0.26569 Linear correlation;based on the correlation coefficient between vegetation and temperature difference,the correlation coefficient is 0.10994,showing a low linear positive correlation.(4)The relationship between vegetation and topographic factors is mainly manifest ed in the low average density of low altitude vegetation,strong volatility,poor vegetatio n stability and low density in low slope area.Vegetation density in the southern slope,s outheast slope and east slope is higher Big.