Study On Temporal And Spatial Dynamics Of Urban Green Space Landscape Pattern And Its Driving Forces In Taiyuan

As an important factor to maintain the balance of urban ecosystem,urban green space played an important role in improving the urban ecological environment.Based on the study of urban green space landscape pattern and its spatial and temporal dynamic changes,this paper provided a scientific basis for the optimization of urban ecological pattern.We choose the city green space which located within the Taiyuan high-speed beltway highway as the research object,the landscape classification map was getting by interpreted the remote sensing data in the years of 1996,2006 and 2015.Analyzing the dynamic change of green landscape in different periods by ArcGIS 10.4;Calculating landscape indexes by Fragstats4.2 and analyzing the degree of fragmentation of the city landscape,patch shape change and landscape diversity by using the principle and method of landscape ecology.Dividing the north-south and east-west transects and analyzing the gradient change of city green space landscape pattern index by using moving window method.Finally,multiple linear regression analysis was used to quantitatively analyze the change of urban green space.The results were as follows:1.The proportion of green space were 21.64%,30.60%and 35.41%in the years of 1996,2006 and 2015,showed that The proportion of urban green landscape was increasing year by year.2.Based on the landscape pattern dynamic change analysis showed that:the new green city mainly came from the agricultural land,the proportion was 39.10%.After 2006,the new city greenbelt mainly originated from the city construction land,the proportion was 26.61%;but the lost city greenbelt mainly was transformed into city construction land.Before the year of 2006,the areas of change were 2165hm2;After 2006,the transformation of the areas were 3444hm2,showed that with the rapid development of the city,city construction land expansion was the main reason for the lost city green.3.The overall landscape index of urban green space showed that the fragmentation degree of city green space was reducing,connectivity plaque was enhancing;the overall shape of city green patches was tended to irregular;The proportion of various landscape types was expanding and the landscape diversity was decreasing.4.These landscape pattern indexes were calculated by using the semi variance analysis by GS+7.0,showed that the radius of 1500 meters was the best sliding window in the study area.It could reflect the change of spatial pattern.These landscape indexes were compared in the North-South and East-West transect,showed the landscape change of urban greenbelt was similar to that of the whole landscape.With the development of time,the proportion of urban green space was increasing,fragmentation was decreasing?5.The driving factors of urban green space were analyzed by multiple linear stepwise regression analysis,obtained the following model:Y = 4.06E-16 + 0.451X1-0.19X10 + 0.323Xn + 0.448X12(R2=0.995,P?0.05),indicated that the primary industry,urban roads,realty industry and total population of the city were the driving factors of urban green space change.