Regional Ecological Land Demand Simulation On The Coordination Of The Eco-Environmental Stress

The environment is an important guarantee of human survival and development, and the excellent ecological environment is the basic conditions of the existence and development of the whole human society. With the rapid development of the technology in20th century, human society is more civilized affluence because of the development and utilization of the natural resources. With the development of human society and the great improvement of the science and technology and social productivity, human beings make impact on the environment on an unprecedented scale and intensity, even with the destruction of natural ecosystems in many times, which makes the safety of the ecological system under increasing damage and endanger the safety of human beings. Therefore, evaluation of the conditions of the ecological environment has aroused great concern, and it has become a hot research topic to optimize the layout of land use to coordinate the relationship between economic development and ecological environmental protection. Since the reform and opening up, the economic development of Jiangsu has made unprecedented achievements. But the model of economic development in general is still based on the cost of high input, high consumption and high pollution in order to achieve high growth, thus resulting in a series of problems, such as unreasonable land use layout, land degradation, ecological land being eroded and deterioration of the habitat environment, which is a serious impediment to sustainable development of land, so the importance of coordination of land use and ecological environment construction for social development is increasingly prominent.Simulating the land use of Jiangsu Province, in particular the ecological land use demand, analyzing the eco-environmental stress, by adjusting the land use type to coordinate the relationship between the land use and ecological environment construction, economic development and ecological environmental protection, promoting the sustainable development of the whole province’s economic and social, all of this is of great significance on the ecological province construction planning work smoothly.On the basis of the introduction of systematic conservation planning theory, selecting the county-level regional as the evaluation units, collecting the basic data of the evaluation units through the network, remote sensing interpretation and field surveys, constructing the model to calculate the eco-environmental stress through a comprehensive analysis of the existing research literature on the eco-environmental stress, making quantitative evaluation about the conditions of ecological environment of the evaluation units, and then combined with the existing stock of ecological land to assess the validity that the existing ecological land meet the regional demand for ecosystem services, getting the indicator of regional ecological satisfaction, building the simulation model of ecological land demand, determining the indicator’s standard of the evaluation units, the standard adjustment in different proportions, designing several different plans of the ecological gap and the land adjustment, analyzing and selecting the best plan, and ultimately getting the simulation results of the gap of the ecological land in every evaluation unit. The paper has the main results and conclusions as follows:1. On the basis of the analysis of existing literature, from the subject and place which cause the pressure, determining the quantitative evaluation system of eco-environmental stress based on the pressure-response model, and building the calculating model of the eco-environmental stress, using the model for the quantitative assessment of the ecological environment in Jiangsu Province in2009. The results show that the ecological environment in Jiangsu Province in2009is unsatisfactory, ecological construction and economic construction have not been coordinated very well. There are43counties and cities in which the ecological conditions is in the warning level, only12in the level of security, and8in the unsafe level which have more concentrated distribution in the developed Yangtze River Delta region.2. Introducing the theory of systematic conservation planning to the optimization of the regional land use structure, building a simulation model of ecological land demand on the basis of the analysis of the eco-environmental stress and the stock of existing ecological land, and using the model to simulate the ecological land demand in Jiangsu Province in2009. The results show that there is a big gap of ecological land of Jiangsu Province in2009, a total of about5817square kilometers. There are25counties in which the ecological land gap is more than100square kilometers, only19counties does not exist ecological gap. The counties which have the bigger gap mainly distribute in the northern areas of Jiangsu, and mostly in the eco-warning level. Adjusted simulation results show that it still has a bigger ecological gap in Jiangsu Province in2009, a total of5552.6815square kilometers. The counties which have the gap concentrated distribute in the north and south, and the ecological level of these counties is eco-warning or ecological insecurity. The counties in which the ecological level is ecological safety do not have the ecological gap.3. Based on the development platform of ArcGIS Engine, modeling the study’s data processing by C#language programming, developing a GIS-based simulation system for ecological land demand, realizing the operationalization of entry and processing of data. The main functions include basic layer operations, the analysis module of the eco-environmental stress and the analysis module of the gap of the ecological land demand.