The Evaluation Method for Ecosystem Service Value Based on National Census Geography Results

Ecosystem services are directly related to the well-being of human beings, and it is one of the important components of the construction of ecological civilization in China. There is still a lack of regular ecological service value accounting at the national scale because of the limitations of precision and time series data. In this study, we rebuilt the representation relationship between land cover data of geographical conditions and ecosystem classification based on the internal structure and function of ecosystem type, and the semantic concept of content index. The vector data of China's terrestrial ecosystem are produced. Then, we used equivalent factor model through the optimization of the vegetation feature index that reflect the vegetation physiological characteristic (EVI, NPP and growing-season length), and introduced geo grid spatial expression technology suitable for multi granularity transformation under different scales is applied, carrying out the production design of ecosystem service value data set based on vectorization data of national census geography. Production design realizes the precision and normalization of ecosystem service value accounting, meets the needs of dynamic monitoring of ecosystem service value under different scales, and completes the production of ecosystem service value data set under the national scale. According to the above ecosystem service value accounting method, the total ecosystem service value and the supply, regulation, support and cultural service sub function service value 1 km×1 km grid data are produced. The total terrestrial ecosystem service value of China in 2015 is 40.25×1012 CNY. The result is reliable and can meet the requirements of different scales for granularity transformation compared with earlier results. It will provide data support for the current national scale of horizontal ecological compensation policy