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GIS and RS technology - based regional eco- environmental sensitivity and

Author: ZuoZuo
Tutor: ZhaoChunYong
School: Chongqing Normal University
Course: Human geography
Keywords: Ecological environment Sensitivity evaluation Soil Erosion Analytic Hierarchy Process Geographic Information Systems Remote sensing Fengdu
CLC: X826
Type: Master's thesis
Year: 2004
Downloads: 700
Quote: 9
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Abstract


With the development of society and advances in technology, the scope and intensity of the human impact on the natural environment are constantly increasing, which also caused the regional eco-environmental problems in expanding and intensifying, such as desertification, soil erosion, salinization and acid rain and so on. Regional eco-environmental sensitivity increasing number, with the rapid development and constantly improve the technical means of the theory of geographic information systems and remote sensing theory, their technology has been initially limited the scope of application expanded to almost all spatial information related applications. Into the nineties, the theory of geographic information system and remote sensing, the constant improvement of the theory, lead to the emergence of a variety of powerful commercial geographic information system software. A large number of practical emergence of geographic information system software, and promote the expansion of geographic information systems to various areas of application. In this context, the latest geographic information system and remote sensing technology is applied to the study of the ecological environment is very urgent. In this paper, the study of the ecological environment, the core problem - sensitivity evaluation, the focus of the Three Gorges Reservoir Area county - Fengdu County, for example, try the eco-environmental sensitivity and in the integration of geographic information system and remote sensing techniques to solve past evaluation of eco-environmental sensitivity in the evaluation of low efficiency, poor accuracy, time-consuming, and scientific. In this research, build a platform foundation to ARCVIEW geographic information system, to complete GIS spatial modeling, ecological environment sensitivity evaluation. Through this research, mainly to obtain the following results: (1) regional ecological environment sensitive evaluation basic theoretical research. Definition of the concept of the ecological environment and ecological environment sensitivity. From the ecological environment and the analytic hierarchy process to establish the conceptual framework of the conceptual framework as well as the evaluation index system of regional eco-environmental sensitivity and selected. The results can provide theoretical guidance for the regional eco-environmental sensitivity and ecological environment management practices. (2) Evaluation of regional eco-environmental sensitivity mapping scale study. The dialectical relationship between the regional scale of the the sensitive total evaluation of the regional ecological environment system mapping scale mapping visual effects, data accuracy, the amount of data load system on the basis of experimental data, and draw a regional scale sensitive ecological environment in the framework of the total evaluation of digital research environment. (3) the use of GIS spatial analysis techniques, making the regional ecological sensitivity evaluation quantitative evaluation, such as soil erosion, landslide sensitive evaluation from the principle of the calculation of trouble, the shortcomings of a large amount of data, and make the whole process of operation fluid. (4) key ecological factor sensitivity evaluation. Important factor of several sensitive to the impact on the ecological environment, based on the analysis of the status of the regional ecological environment, soil erosion, landslides sensitive to acid deposition on ecosystems sensitive habitat sensitivity. And its evaluation model. (5) evaluation model. In the analysis of the existing environmental and ecological evaluation model approach based on the optimization of regional eco-environmental sensitivity evaluation model. For comprehensive evaluation and mapping of regional eco-environmental sensitivity.

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CLC: > Environmental science, safety science > Environmental Quality Assessment and Environmental Monitoring > Analysis and Evaluation of Environmental Quality > Biological assessment, ecological assessment
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