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文摘
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挠力河流域面积为241．67×10^4hm^3，其自然条件决定了该流域具有极丰富的湿地生物多样性，从1980年以来，由于经济的快速发展，该流域湿地景观和土地利用发生了显著的变化。自然湿地资源从1982年的53．32×10^4hm^2变成2000年的17．17×10^4^hm^2,减少了67．8％，而水田面积却增加了38．5倍，同时，旱田面积也大幅度增加，该文利用遥感和GIS技术，对近20年来该流域湿地景观变化过程进行时空定量分析，并结俣流域土地利用／土地覆盖类型的动态变化，探讨流域在经济快速发展中土地利用与湿地之间的演化规律及其对湿地的影响机制。 |
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其他语种文摘
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Naoli River Basin, with a total area of 2 416 700 ha, is one of the largest basins in the Sanjinag Plain. The basin is rich in wetland biodiversity, especially in wetland landscapes, ecosystems and communities due to the physical conditions. But, since the beginning of the founding of the P. R. China, large scale land reclamation activities had happened for a few times. Especially at the rapid economic development period after 1980, China has put economic reform and opening policy into practice. As a result, great changes had occurred in wetlands. The natural wetland area decreased from 533 200 ha in 1982 to 171 700 ha in 2000, or reduced by 67.8%, and paddy field area increased 138 200 ha or 39.43 times of that in 1982. Dry farming land area also increased from 969 100 ha in 1982 to 1 363 400 ha in 2000, an increase of 40 700 ha. Now the Naoli River Basin has become an important national grain production base from the previous "great northern wildness". This paper explores the process of wetland landscape changes over the past 20 years based on remote sensing and GIS techniques, particularly, wetland landscape classification system. And temporal and spatial land use/land cover changes are emphasized to analyze the relationship between land use and wetlands. |
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来源
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自然资源学报
,2002,17(6):698-705 【核心库】
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关键词
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20世纪80年代
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挠力河流域
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过程研究
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湿地
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景观变化
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影响机制
;
土地利用
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地址
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中国科学院长春地理研究所, 湿地环境开放实验室, 吉林, 长春, 130021
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-3037 |
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学科
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自然地理学 |
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基金
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中国科学院知识创新工程项目
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中国科学院特别支持项目
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文献收藏号
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CSCD:1073818
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