| 基于GIS和RS的青海共和盆地土地沙漠化时空演变研究 |
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| 引用本文： | 封建民. 基于GIS和RS的青海共和盆地土地沙漠化时空演变研究[J]. 安徽农业科学, 2010, 38(4): 1965-1967,1970 |
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| 作者姓名： | 封建民 |
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| 作者单位： | 咸阳师范学院旅游与资源环境学院,陕西咸阳,712000 |
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| 基金项目： | 陕西省教育厅科研专项计划项目(99JK128);;咸阳师范学院重点项目(05xsyk101) |
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| 摘 要： | 在野外调查和前人研究的基础上,建立了青海共和盆地沙漠化土地遥感分类分级的指标系统,并在地理信息系统支持下,对该区1990和2005年的TM影像进行了目视解译,分析了该区近15年来土地沙漠化时空变化规律。结果表明,2005年共和盆地共有各类沙漠化土地7419.62km2,占研究区总面积的62.84%,其中严重沙漠化、重度沙漠化、中度沙漠化和轻度沙漠化土地面积分别占沙漠化土地总面积的12.17%、7.42%、17.65%、62.76%。与1990年相比,2005年沙漠化土地总面积减少了145.55km2,年均减少9.7km2,年递减率为0.083%。从土地沙漠化的动态演变来看,沙漠化土地发展和逆转的面积和斑块数量相近,这表明研究区土地沙漠化趋势虽然得到一定程度的控制,但土地沙漠化形势仍然相当严峻。
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| 关 键 词： | GIS和RS 共和盆地 沙漠化 时空演变 |
Research on the Spatial-temporal Evolution of Soil Desertification in Gonghe Basin of Qinghai Province Based on GIS and RS |
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| FENG Jian-min. Research on the Spatial-temporal Evolution of Soil Desertification in Gonghe Basin of Qinghai Province Based on GIS and RS[J]. Journal of Anhui Agricultural Sciences, 2010, 38(4): 1965-1967,1970 |
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| Authors: | FENG Jian-min |
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| Affiliation: | College of Tourism and Resource Environment Science;Xianyang Normal University;Xianyang;Shaanxi 712000 |
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| Abstract: | Based on the field investigation and summarizing experiences from other studies,the classification and interpretation criterions of desert land in Gonghe Basin of Qinghai was established by using remote sensing.Under the support of geographic information system(GIS),TM images of the study areas was detected from 1990 to 2005 through visual interpretation.The results showed that the desert land of the study area was 7 419.62 km2 in 2005,occupying 62.84% of the whole region.Among them,the very serious,serious... |
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| Keywords: | GIS and RS Gonghe Basin Desertification Spatial-temporal evolution |
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