Research Of Evaluation Methods Of Ecological Assets Of Shanghai Coastal Zone

The ecosystem is a complex consisting of the lives and the environment around them, and it is the necessary resource for the sustainable development of human society. The manifestation of ecological resource value is defined as ecological assets. The coastal region is the most dynamic natural zone and also the most predominant area in resource and environment. The coastal zone is an independent environment system with the characteristics of transition between sea and land, which is closest to the life and development of human beings.With the development of economy and the progress of the society in recent years, the processes of urbanization and industrialization have been accelerated gradually. The impact and exploitation of human beings to the natural resources and environment have been in an unprecedented situation. In addition, a series of problems concerning coastal ecology have emerged, and the decline of ecological assets of the coastal zone has become more and more remarkable. The eastern coastal region is one of the highest population density areas of China. It has significant environment problems due to the less attention to the ecosystem protection in the early economy-developing days. These problems have already become the bottleneck of the social and economic development of coastal region, which bring enormous negative influences to the production and life of the human beings.It is important to understand and measure the ecological assets, which makes great sense in the development of traditional capital concept, the adjustment of economy, complementarities of the economic policies and the practice value of the coastal ecological environment. Meanwhile, the ecological assets can help to guide the economic development of the coastal area, construct and protect the ecological environment and support macro decision-making of the government. It is essential to master the national or regional ecological capital in time, exactly and dynamically with the help of rapid-developing spatial information technologies.The national community economic development, construction and protection of ecological environment and the macro decision-making of the governments at all levels would benefit.In this paper, with the support of ecological principles and methods, Remote Sensing (RS) technology and geographical information system (GIS) technique, we established RS quantitative ecological assessment model for coastal zone. First, the distribution of the total solar radiation was calculated with the solar radiation model based on coastal zone DEM data. Second, we mapped the land use conditions in coastal zones using Landsat 5 TM images. At the same time, the different land use types and size of different kinds of ecosystems was gained. In addition, based on the calculated parameters, such as NDVI, vegetation coverage based on RS images, the net primary productivity (NPP) and adjustment factor were calculated, which could reflect the status of ecosystem quality basically. Finally, the ecological assets distribution in the coastal zone was calculated on the basis of integration of the above work and the geographic attributes and statistics data. The model proposed in this paper was applied in the coastal zone of Shanghai, China. Land use/cover changes(LUCC) in 1998 and 2005 were dynamically and comparatively analyzed, and the ecological assets distribution among the past seven years was calculated, and we also made the comparative analysis and the difference of the ecological spatial distribution in respect years were also analyzed.