| 基于RS的北京山前平原区土地沙化研究 |
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| 引用本文： | 刘克,赵文吉,胡德勇.基于RS的北京山前平原区土地沙化研究[J].林业资源管理,2009(1). |
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| 作者姓名： | 刘克 赵文吉 胡德勇 |
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| 作者单位： | 首都师范大学,资源环境与旅游学院,北京,100048;三维信息获取与应用教育部重点实验室,北京,100048;资源环境与地理信息系统北京市重点实验室,北京,100048 |
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| 摘 要： | 土地沙化是北京市最主要的生态环境问题之一,是制约其城市发展的重要因素,研究北京土地沙化的动态变化趋势及成因对保障北京市的生态安全和改善其环境质量有重要意义。利用2007年4月SPOT5卫星的多光谱和全色影像,结合植被覆盖度,土壤类型和土地利用类型这3种辅助数据,进行沙化信息提取。根据所提取的信息,分析北京山前平原区土地沙化现状和动态变化特征,并结合气象、水文等多元信息资料的统计分析数据对其沙化成因进行探讨。研究结果表明:在各种自然和人为因素的影响下,研究区的沙化土地主要分布在永定河、潮白河、温榆河3条河流沿岸,康庄、南口地区以及怀柔、密云大沙河地区;沙地类型主要是固定沙地,以轻度和中度沙化为主;2007年与1999年、2004年北京沙化土地数据相比,沙化土地总面积呈减少趋势,表明北京市防沙治沙工作卓有成效,前景乐观,但局部依然存在边治理边破坏的现象,防沙治沙工作依然任重而道远。
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| 关 键 词： | 沙化 RS 变化趋势 成因 |
Research on Land Desertification of Beijing Piedmont Plain Area Based on Remote Sensing Technology |
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| LIU Ke,ZHAO Wenji,HU Deyong.Research on Land Desertification of Beijing Piedmont Plain Area Based on Remote Sensing Technology[J].Forest Resources Management,2009(1). |
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| Authors: | LIU Ke ZHAO Wenji HU Deyong |
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| Abstract: | Land desertification,which is also the key factor restricting the development of Beijing,has become one of the most serious ecological environmental problems in the capital.As a result,it is urgent to study the transformation trends and formation causes of the land desertification for guaranteeing the ecological security and improving the ecological environment quality in Beijing.SPOT5 data(including panchromatic and multi bands) of Beijing area in April 2007 were acquired.The land desertification in the piedmont plain of Beijing was recognized and extracted with three types of data(vegetation coverage,soil type and land use) from above remote sensing data.According to the extracted information,the desertification status and dynamic characteristics were analyzed and evaluated with the support of RS technology.Then the formation causes of desertification were discussed combined with multiple statistical data such as meteorological information,hydrological information and so on.The result shows that with the double effects of nature and human beings,Yongding River,Chaobai River,Dasha River,Kangzhuang,Nankou and their surrounding areas are the principal distributing areas of the desertification land in Beijing.They are all fixed sand areas that mainly contain mild and moderate desertification.By comparing the result data of the land desertification among the years of 1999,2004 and 2007,it is found that the total area of the desertification land has the trend of decrease.The area of the desertification land in each county in the suburb is reduced except Yanqing.It proves that the action of preventing and controlling the land desertification has obtained prominent effect.However,the phenomenon of destroying at the same time of improving still exists in some areas.Combating the land desertification still has a long way to go. |
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| Keywords: | RS |
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