Study On The Land Use Changes And Ecological Service Value In The Upper Of Fenhe River

Land use change is an important research content of global ecological environment change.The analysis of the change of land use and the function of ecosystem services is of great significance to the maintenance of regional ecological security and the exploration of the sustainable development of the ecosystem.Ningwu County and Jingle County,located in the upper reaches of the Fenhe River,are important watershed units in the ecological fragile region of the Loess Plateau.In recent years,due to the acceleration of urbanization and the continuous development of coal mining activities,the land use structure is unreasonable and the ecological environment tends to deteriorate.In order to reveal the effects of human activities on land use and ecological service value in the upper reaches of Fenhe River,to ensures the smooth development of ecological protection and restoration project of forest,field,lake and grass in the upper reaches of Fenhe River.With the support of ArcGIS,this study combines the tobacco feeling data of 2006,2011 and 2016 in the upper reaches of Fenhe River.The following studies have been carried out:(1)Analysis on the characteristics of land use change in the upper reaches of Fenhe River from 2006to 2016;(2)Analysis of temporal and spatial change of ecological service value in the upper reaches of Fenhe River from 2006 to 2016;(3)Correlation analysis between land use change and ecological service value,the results are as follows:(1)The land use change in the upper reaches of Fenhe River is remarkable in the last 10 years.Grassland and water area showed a downward trend,while cultivated land,woodland and construction land area showed an upward trend.and the unused land accumulation increases slightly and then decreases.Grassland is the main type of land use,accounting for more than 36%of the total area.The overall dynamic attitude of land in the upper reaches of Fenhe River increased at first and then decreased in the past 10 years,and was 0.96 from 2006 to 2011,reaching the highest value,and the landscape change was fierce.land circulation was requently.The index of land use degree increased with the passage of time,the degree of landscape fragmentation decreased,and began to turn to coarse grain scene.(2)The value of ecosystem service continued to decrease in 10 years,which decreased by 6.32×10~8 yuan.The single ecosystem services of food production,raw material production and nutrient cycling continued to increase.In the period of2006-2011,the level of ecological service value of the towns in the upper reaches of the Fenhe River has changed greatly.The change of the level in the period of2011-2016 is small and stable,showing the distribution characteristics of high and low in the north and low in the south.As a whole.,the value of the ecological service in the towns is at a lower level.(3)During the study period,the area of forest land was the most closely related to ecosystem service value,and the area of construction land was the least related.In the process of land use,special attention should be paid to the changes of these two types of land.The relationship between land use degree and ecosystem service value is negatively correlated,and with the increase of time,the degree of negative correlation becomes stronger and stronger.