Study On The Land Use/Cover Changes And Ecosystem Service Value Of Guyuan County

Guyuan County is on the mid zone of the north farming Pastoral ecotone, and is located the transition zone of Agricultural areas and pastoral areas. The Special geographical is the irreplaceable of natural ecological barrier and water conservation of Jingjinji area.Land Use/Cover Changes have a direct impact on the ecological environment of Beijing, Tianjin. Over the years, the country to protect the local ecological environment, returning Farmland to Forest and Grassland and "Three North" Shelterbelt Project. Take1988,1998,2009three-year TM remote sensing image as the data, by the ARCGIS and ERDAS software, get the map of land use. On this basis, Combined Gaodi Xie, etc and Costanza theory and methods, researched on the value of ecosystem services in Guyuan County.The results show that, during the entire study period, the land use of Guyuan County changed significantly. Overall, it is mainly the change of forestland, grassland and farmland. From1988to1998, Mainly as the reduction of the area of forest and grassland, and farmland is a substantial increase; The construction land was increase. From1998to2009, the farmland was significantly reduced, while a substantial increase in the area of forest and grassland. In addition, Water area was to reduce significantly, most of thar conversed to the unused land. Through statistical and analysis, in the study period, the trend of the ecosystem service value of Guyuan County was first decreased and then increased. Analysis obtained, the changes mainly affected by human activities, climate change has also affected this.