Abstract:The changes in value of ecosystem services of 1985, 1990, 2000, 2007 in Zigui county in Three Gorges Reservoir area was studied using statistical and observed data, and annual runoff, sediment yield, nitrogen and organic carbon exported from Zigui based on AnnAGNPS (Annualized AGricultural Non-Point Source) model. Runoff, sediment yield, total nitrogen, total phosphorus and total organic carbon of 2000 exported from Zigui county were the highest, which were 473mm, 68.6t/km2, 133kg/km2, 33kg/km2 and 684 kg/km2, respectively. All the above quantities of 2007 were the lowest, which were 419mm, 40.6t/km2, 112kg/km2, 20kg/km2 and 445kg/km2, and which reduced by 12.8%, 68.9%, 18.7%, 65.4% and 53.5%, respectively. The value of ecosystem services in Zigui county were also changed in different years. The values of ecosystem services were 45.1×108 Yuan (2000) and 54.2×108 Yuan (2007) respectively, which increased 20.1%. The method using observed data and AnnAGNPS model was objectively which can reduce the uncertainty of the quantity of ecosystem services. This method not only needed a large amount of data, but also had a very complicated process, and which might be influenced by multiple factors above. This might limited the scale and depth in assessing the values of ecosystem services in some other places.
田耀武, 黄志霖, 肖文发. 基于AnnAGNPS模型的三峡库区秭归县生态服务价值[J]. 中国环境科学, 2011, 31(12): 2071-2075.
TIAN Yao-Wu, HUANG Zhi-Lin, XIAO Wen-Fa. Ecosystem service value changes of Zigui county in Three Gorges Reservoir area based on AnnAGNPS model.. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(12): 2071-2075.