Spatial Differentiation And Prediction Of Land Ecosystem Service Value In Taihang Mountain Area Of West Shijiazhuang

Ecosystem services are life support products and services that are directly or indirectly obtained through the structure and processes of ecosystems.As the natural green ecological barrier of Shijiazhuang,the ecological environment is fragile but the ecological service value is considerable,the quantitative evaluation of the value of land ecological service in mountainous area can provide the basis for the regional ecological environment construction and the value protection work.The analysis of the characteristics of spatial differentiation rules of land ecological service value in the research area can deeply understand the changing law of ecological service value of mountain area,promote the sustainable use of regional land resources,and have positive significance to the formulation of ecological policy and environmental protection in mountainous areas.Taking the Taihang Mountain area in the west of Shijiazhuang as an example,on the basis of interpretation data of remote sensing imagery in the study area,the status and changes of land use during the period from the fourth period of 2000 to 2015 were analyzed,and three topographic factors of elevation,slope and aspect were extracted by using geographic information system.Based on the above analysis,the basic data of the fourth phase of the study area were analyzed.In the study area,the distribution of land use type area,structure and vertical space is summarized.Based on this,the time-space and gravity center changes of ecological service value are analyzed,and Markov is used to forecast the ecological service value.The results are as follows:The value of ecological services changed little between 2000 and 2015.In total,the value of ecological services increased from 14.997 billion yuan in 2000 to 150.02 billion yuan in 2015,an increase of about 23 billion yuan.The value of ecological services remains stable among different regions.In space,the distribution law of west high east low is presented.Forest land,grass land and rivers and lakes and other types in ecological service value of the total contribution rate is high,the elevation height is positive impact on the land ecosystem service value,and with the increase of the elevation height on the whole,the smaller the influence of the trend.However,the height of the eastern plain has little influence on the value of land ecological services.For more than 2 ° slope in area with ecological servicevalue is closely relative to high or low;Slope upward in the north and south has an impact on the value of ecological services.From the overall study area ecosystem service value center of gravity change,little change during the study period,the center of gravity position both in ping shan county east,the overall slightly north is located in the geometric center,2000-2015 period,the land ecological service value center of gravity to southeast direction,relative to the scale in the study area,the position change of a smaller distance and moving distance has a tendency to decrease gradually.Using the markov prediction model can predict the future overall trend of land use change of cultivated land and water area decreased,forest grass land is slightly increased,and the construction land area increased,the ecological service value of about 14.5 billion yuan,more than the existing levels will reduce 500 million yuan.