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Based on RS and DEM nebkhas Aibi surrounding spatial pattern of

Author: LiXiaoZuo
Tutor: ChenShuJiang
School: Xinjiang Normal University
Course: Cartography and Geographic Information Systems
Keywords: Aibi Nebkhas Visual interpretation RTK DEM
CLC: P208;P237
Type: Master's thesis
Year: 2010
Downloads: 113
Quote: 1
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Abstract


Xinjiang in western China's door Aibi lakes, southwestern margin of the Junggar Basin is the lowest depressions Tail lake is the largest saltwater lake in Xinjiang, China was included in an important list. Aibi special geographical location and terrain features to make it more complete biodiversity, indications of Junggar Basin, the ecological environment is the key to regional variations. In China inland desert natural ecosystems typical and high conservation value. Aibi widely distributed around Lake Sand of biological and formed under the action of the wind nebkhas. Nebkhas arid desert region, semi-arid and sub-humid sandy sandy shores with common biological aeolian landforms, as sand flow encountered shrub block, sand accumulation of substances in and around shrubs and the formation of [a ]. Nebkhas succession process is usually degraded natural factors and human activities on ecosystems pressure combined result is a reflection of the evolution of ecosystems and climate change is one important indicator, so Nebkhas generation and decay with inverse process of desertification is closely related. Therefore, the spatial distribution pattern shrub beach status of research on desertification control and ecological protection zone plays an important role. This article attempts to investigate the combination of points, lines and ways to RTK as a platform focusing on Aibi surrounding typical quadrat Nebkhas morphological characteristics, plant ecology characteristics were measured and the sampling and analysis, the use of GIS software to generate a digital DEM (Digital Elevation Model, referred to DEM), combined with high-resolution remote sensing images on Aibi for visual interpretation of the results obtained Nebkhas Aibi total area surrounding and from Nebkhas vegetation type, density, height, area and volume quantitative description of several aspects, which studies Nebkhas Aibi surrounding the spatial distribution pattern and to investigate its causes. To provide a basis for future monitoring data and for future research work to provide new techniques and methods. Based on the spatial distribution of Aibi surrounding nebkha related data analysis, preliminary draw the following conclusions: (1) the point of application of the study area, line, surface surveys combined approach to RTK as a platform, collected accurate baseline data for a large number of relevant, reliable, feasible, provide a basis for future monitoring. (2) Select the four plots of different vegetation types nebkhas by DEM data extraction plots Nebkhas density, height, area and volume of Nebkhas quantitative analysis proving that DEM help nebkhas fine form in quantitative analysis. (3) integrated visual interpretation of remote sensing technology and related data plots Nebkhas results of the analysis, the system for the first time around nebkha Aibi quantitative analysis of the spatial distribution, obtained a total area of ??approximately 839.1km ~ 2. (4) the formation of integrated Nebkhas conditions and succession law, Nebkhas of lake surrounding the causes of spatial pattern.

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CLC: > Astronomy,Earth Sciences > Surveying and Mapping > Photogrammetry and Surveying, Mapping and Remote Sensing > Surveying, Mapping and Remote Sensing technology
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