近30年来河西走廊湿地变化及其机理初探
白磊, 姜琦刚, 刘万崧, 崔瀚文
吉林大学地球探测科学与技术学院,长春130026
The Change of Wetland in Hexi Corridor in the Past Thirty Years and a Tentative Discussion on Its Mechanism
BAI Lei, JIANG Qi-Gang, LIU Wan-Song, CUI Han-Wen
College of Geoexploration Science and Technology, Jilin University, Changchun 130026, China
摘要 应用4个时相的卫星遥感数据,对河西走廊的湿地进行了遥感动态监测。结果表明,河西走廊1973年、1990年、2000年及2006年前后的湿地
面积分别为14 132.38 km2、13 299.44 km2、12 519.88 km2和12 312.38 km2,近30 a来减少了12.88%(共1 820.00 km2),动态度为-0.39%。其
中,自然湿地资源不断减少,减少速率不断加大,以沼泽湿地减少最为显著; 人工湿地面积持续增加,特别是近年来增加迅速,湿地斑块数和斑块
密度增加,破碎化程度加大; 多样性指数和均匀度指数持续上升,各湿地类型比例差异减小,各类湿地分布趋于均匀。气温、降水、青藏高原隆升
等自然因素是河西走廊湿地变化的重要原因,而人类活动加剧了这一变化趋势。
关键词 :
盆地 ,
遥感 ,
地质构造 ,
铀矿化
Abstract : In this paper, the wetland in Hexi Corridor was dynamically monitored by remote sensing technology using four different
temporal remote sensing data. The results show that the area of the wetland was 14 132.38 km2 in 1973, 13 299.44 km2 in 1990, 12
519.88 km2 in 2000, and 12 312.38 km2 in 2006. In the past 30 years, the reduced area amounted to 1 820.00 km2, which occupied
12.88% of the total area, with the dynamic degree being -0.39%. Natural wetland has been reduced continuously at an accelerating
speed, with swamp reduced most significantly. Meanwhile, the area of man-made wetland has steadily increased, especially in
recent years. The number and density of wetland patches have increased, and the fragmentation degree now is higher than that in
the past. The diversity index and evenness index have increased continuously, the difference between the proportions of various
wetlands have decreased, and the distribution wetlands tends to become uniform. Temperature, precipitation, uplift of the Tibetan
plateau and other natural factors seem to be the important causes for wetland change in Hexi Corridor. In addition, human
activities have undoubtedly aggravated such a tendency.
Key words :
Basin
Remote Sensing
Structure
Uranium Metallization
出版日期: 2010-03-22
引用本文:
白磊, 姜琦刚, 刘万崧, 崔瀚文. 近30年来河西走廊湿地变化及其机理初探[J]. 国土资源遥感, 2010, 22(1): 101-106.
BAI Lei, JIANG Qi-Gang, LIU Wan-Song, CUI Han-Wen. The Change of Wetland in Hexi Corridor in the Past Thirty Years and a Tentative Discussion on Its Mechanism. REMOTE SENSING FOR LAND & RESOURCES, 2010, 22(1): 101-106.
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https://www.gtzyyg.com/CN/10.6046/gtzyyg.2010.01.19
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https://www.gtzyyg.com/CN/Y2010/V22/I1/101
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