| 引用本文: | 李虎,高俊峰,王晓峰,吴焱.新疆艾比湖湿地土地荒漠化动态监测研究.湖泊科学,2005,17(2):127-132. DOI:10.18307/2005.0206 |
| LI Hu,GAO Junfeng,WANG Xiaofeng,Wu Yan.The Dynamic Monitoring of Desertification in Xinjiang Lake Aibi Wetlands Basing on RS and GIS. J. Lake Sci.2005,17(2):127-132. DOI:10.18307/2005.0206 |
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| 摘要: |
| 新疆艾比湖湿地是准噶尔盆地西南缘最低洼地和水盐汇集中心,在我国内陆荒漠自然生态系统中具有典型性和较高的保护价值.本次研究通过对不同时相的多源卫星数据进行配准与复合分类处理,结合野外调研,解译分析各类荒漠化土地类型的时空分布特征.研究结果表明;艾比湖地区的荒漠化以土地盐渍化和风蚀两大类型占绝对优势,其动态变化特点是风蚀减少盐渍化增加.2000-2002年风蚀荒漠化的面积减少了403.06162km2,减少幅度达53%.盐渍化面积增加了183.7km2,比重由54%上升为70%.就荒漠化的程度而言目前是趋于下降.很多重度风蚀及盐渍化转为了中度,复合型荒漠化面积增加. |
| 关键词: 艾比湖 土地荒漠化 遥感与地理信息系统 动态监测 |
| DOI：10.18307/2005.0206 |
| 分类号: |
| 基金项目:新疆高校科研计划重点项目(XIEDU20043115)国家自然科学基金重大研究计划重点项目(90302012)中国科学院领域前沿重点项目(CXNIGLAS-A01-1)共同资助． |
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| The Dynamic Monitoring of Desertification in Xinjiang Lake Aibi Wetlands Basing on RS and GIS |
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LI Hu1,2, GAO Junfeng3, WANG Xiaofeng2, Wu Yan2
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1.Department of geography, Fujian Normal University, Fuzhou, 350007 P. R. China;2.Department of geography, Xinjiang Normal University, Urumqi 830054 P. R. China;3.Nanjing Institute of Geography and Limnology, Chinese Academy of Scicences, Nanjing 210008 P. R. Cnina
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| Abstract: |
| The wetlands of Lake Aibi, Xinjiang Autonomous Region has played a significant role for regional ecosystem.The diversified desertificate ecosystem was typical due to its location as well as its geomorphology.The land desertification in Lake Aibi was monitored and analysed based on the RS and GIS techniques during 2000 and 2002.By monitoring land type with hybrid method and post-classification method basing on the image classification, the interrelated data and ground investigation are applied to determine the change of desertification land use/cover in Lake Aibi district.In order to show the present desertification condition, the ground investigations are combined with RS imaging.The results revealed that the wind-eroded and saltified desertification have absolute dominant in Lake Aibi region, i.e: the wind-erosion (xxupied 25.82%, whereas saltified desertification 61.86%.With regard to degrees of desertification, the middle levels had occupied 95% of target fields, among which the heavy levels was more than 27.92%.Investigations also revealed that the area of wind-erosion desertification in Lake Aibi region has reduced 53%, about 403.06 km2 from 2000 to 2002.However, the rising of undergroand water level as well as the increase of lake level has aggravated saltified desertification in some areas.Compare with 2000, the saltification-desertification area had increased 183.7 km2 in 2002, while the middle and heavy level of wind-erosion area had reduced 402.78 km2, The degree of desertification tended to decline.The heavy wind-erosion and heavy saltification land belonged to bad lands in and lake regions, which could be the main source of sandstorm in northern Xinjiang.In recent years, the extending of Lake Aibi surface has turned part of the previous lands into wetlands.NevertheJess, the Lake Aibi region was still threatened by desertification. |
| Key words: Lake Aibi land desertification RS and GIS dynamic monitoring |
