3S-based Study On Spatial Heterogeneity Of Ecosystem Service Value

Ecosystem services is the basis for sustainable development of mankind, it combined with human productivity to form the real material world by material flow, energy flow and information flow, it provided the services necessary for human survival and social development. However with the development of society, human damaged to the environment due to the unreasonable utilization, ecosystem’s ability to provide services to the human society is diminishing, as a result, socio-economic development had been constrained and influenced. How to accurately identify the ecological and environmental problems, scientifically positioning ecosystem service value became topical issues of research in the field of the environment. Different parts of the value of ecosystem services was different,researching on the value of ecosystem services could help to accurately identify the ecological and environmental problems, scientifically positioning ecosystem service value.Take3S-based study on spatial heterogeneity of ecosystem service value as the research topics, the valuation of ecosystem services technology roadmap was determined by system theory, the evaluation method of ecosystem service value indicators was selected, comprehensive and systematic ecosystem services value evaluation index system was established. The visualization distribution of ecosystem service value had a higher theoretical value, it also had a high practical significance on regional ecosystem service value assessment, ecological construction and environmental protection. The main outcomes of the study are as follows:(1) Establish the index system:The main content of ecosystem service value was researched and analysised, independent and representative evaluation factor was screened. It contained three indicators. The first level indicators included value in use and non-use values; Second-level indicators included direct use value, indirect use value, option value and existence value; The third level indicators included ecological system products provide, culture and landscape, regulating air quality, hydrological regulation, noise control, soil conservation, biodiversity maintenance.(2) Determine the value of ecosystem services evaluation theory method: considering the size and geographic and climatic characteristics of the study area range, two-dimensional rectangular grid cell technology system is cited, combining the techniques method of economics assessment, then select the appropriate calculation method for the attributes and characteristics of the various indicators. Ecosystem service value was calculated by direct market approach; culture and landscape, air quality regulation, hydrological regulation, waste disposal, noise control and soil conservation was calculated by alternative market approach; biodiversity maintenance was calculated by expert method or method (CVM); the total value of ecosystem services was calculated by weighted superposition method.(3) Spatial visualization technology framework was construct:After establishing ecosystem service value evaluation index system and technical methods, the processing and interpretation of remote sensing image, the extract work of vegetation normalized index was completed by RS; sensitive areas was positioned, the lack of satellite remote sensing information was make up by regional point positioning function of GPS; calculating spatial analysis data and extracting DEM information was completed by inputing spatial data, storing data, analyzing and processing data and terminal output technology. Each evaluation index system of spatial analysis and visual output purpose was to achieve.(4) Technical methods is verified:Select Shanxi provincial Jiangxian as the object of empirical research, through analysising of the value of ecosystem services of Jiangxian2010, The results was obtained that It was consistent with the actual situation of Jiangxian, the integrity of evaluation system and the accuracy of technical methods was verified.