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Northwest University of Science and Technology (2010)

Dynamic Change of Land Desertification and Its Combatting Management Information System in Shaanxi Province

Guo Xiao Qing

Titre : Dynamic Change of Land Desertification and Its Combatting Management Information System in Shaanxi Province

Auteur : Guo Xiao Qing

Grade : Master’s Theses 2010

Université : Northwest University of Science and Technology

Résumé
The land desertification is one of the world’s top ten environmental issues . Analysis of dynamic changes of land desertification and land desertification control management information system of land desertification control is important . In this study, along the Great Wall to the north of Shaanxi Province and its nearby area as the research object , the 2004 and the 2008 Landset TM images and Shaanxi Province, continuous forest inventory and other related information , analysis of the status of land desertification and its dynamics , the establishment of land desertification control management information system, to obtain the main conclusions are as follows : (1) Yan’an Qiaobei Forestry straight Rollin field research plots for the data source , in 1990, 2000 and 2005 TM / ETM images by supervised classification access to the area of land use map , compared with the Shaanxi Province continuous forest inventory data to verify its accuracy . (2) to the 2004 and 2008 years of TM image of the study area for the data source , based on the same plots research methods to obtain the study area land utilization type figure , extract the vegetation coverage ; combined with desertification type and degree of classification of indicators to analyze the dynamic changes of land desertification in the study area . In 2008 , the study area land desertification main types of wind and water erosion , mainly mild and moderate . Compared to 2004 , severe desertification and very severe desertification area are substantially reduced , mild desertification and desertification area increased . Recent years, the implementation of key ecological projects and achieved certain results . (3) to establish a database of Shaanxi Province land desertification . Will be collected from the sorting and land desertification and its prevention and treatment of the natural and socio-economic statistics , and enter or import the Oracle database . (4) the development of land desertification control information management system in Shaanxi Province . Prototyping development methodology based on the demand , the choice of C / S hierarchy , Visual Basic development environment , MapX Geographic Information plug-in system development, to achieve the different users of land desertification database access its data browsing , query, statistics and thematic map production and other functions

Mots clés : Land desertification TM images Dynamic Monitoring Database System development Shaanxi Province

Présentation (Dissertationtopic)

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