| 浅析若尔盖沙化区地形特征 |
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| 引用本文： | 刘经星,梁玉祥.浅析若尔盖沙化区地形特征[J].四川草原,2009(4):8-10. |
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| 作者姓名： | 刘经星 梁玉祥 |
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| 作者单位： | 四川大学化工学院; |
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| 基金项目： | 国家林业局林业科技支撑计划(2006BAD261003-3);;科技部国际合作项目(2007DFA90570)资助 |
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| 摘 要： | 地处青藏高原东隅的若尔盖湿地是长江、黄河上游重要的水源涵养地和长江、黄河流域重要的生态屏障,素有"高原之肾"的美誉。近几十年来该区湿地萎缩、草原沙化严重,直接威胁到该区域及相邻区域的生态环境。通过卫星遥感动态监测显示,沙化地主要分布于黄河两岸河谷地带(首曲、黑河、白河的中游)1]及其故旧河道,沼泽边缘退化地带以及高山垭口。古河床和河流附近的风积母质上发育的风沙土为沙化区提供了沙源,气温升高、降水减少以及大风因素为沙地的扩展提供了必要的气候条件,而人为的扰动是河谷、沼泽边缘生态脆弱带沙化的诱导因素。
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| 关 键 词： | 若尔盖 沙化 地形特征 蒸发 |
The Analyze of the Terrain Feature of Zoige Desertification and Sandy Land |
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| LIU Jing-xing,LIANG Yu-xiang.The Analyze of the Terrain Feature of Zoige Desertification and Sandy Land[J].Journal of Sichuan Grassland,2009(4):8-10. |
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| Authors: | LIU Jing-xing LIANG Yu-xiang |
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| Institution: | College of Chemical Engineering;Sichuan university;Chengdu 610065;China |
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| Abstract: | Zoige lies on the eastern edge of the Tibetan plateau. It＇ s an important water resource conservation place in the upstream of the Yellow River and Yangtze River, also served as ecological barriers to the Yellow River, Yangtze valley, honoured as＇ Kidney of the Plateau＇ . In recent decades, this area faces seriously wed land decreases and grassland desertification, which influenced its ecological environment. The remote sensing monitor shows that the desertification and sandy land mainly distributed in the valley area of the Yellow River, ancient channel, boggy margin and the wind sweep of the mountain. The ancient channel supplied the sand resource, climate wanning, Precipitation decrease and strong wind provided the necessary condition of desertification expanding, and man-made disturbance is the induction factor of the valley and boggy margin desertification. |
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| Keywords: | Zoige Desertification Terrain feature Evaporation |
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