Study on spatio-temporal evolution characteristics of urban landscape in Dexing City from 2010 to 2020
In order to reveal the spatial and temporal evolution characteristics of landscape pattern in Dexing City and provide reference for ecological construction,ENVI 5.1,ArcGIS 10.7,Fragstats 4.2 and other software were used to interpret and count the landsat remote sensing image data of Dexing City in 2010,2015 and 2020,and the land use transfer matrix,dynamic degree and landscape pattern of Dexing City were analyzed.The results showed that the land landscape types in Dexing City from 2010 to 2020 were mainly forest land,but the area had a slight downward trend,from 1 631.12 km2 in 2010 to 1 615.51 km2 in 2020.The construction land increased from 45.49 km2 in 2010 to 68.81 km2 in 2020.The grassland showed an up and down trend,the cultivated land and water area showed a downward trend.With the increase of construction land area and the decrease of cultivated land,water area and forest land area,there were different degrees of transfer in and out.from the perspective of type level,the area of forest land patch type was the largest in 2010,followed by cultivated land.however,with human disturbance,the dominance of forest land and cultivated land gradually decreased,and the fragmentation degree of each landscape type was high.from the perspective of landscape level,the number of patches and aggregation showed a trend of increasing first and then decreasing.Interspersion and juxtaposition index,shannon diversity index and shannon evenness index increased year by year,and the spread index decreased.Therefore,the distribution pattern of cultivated land,forest land and grassland in Dexing City was developing in the direction of fragmentation and complexity,and the construction land was concentrated and contiguous.
万方数据
维普
