| 基于遥感和GIS的黄土高原小流域植被退化研究 |
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| 引用本文： | 索安宁,周睿,洪军,葛剑平.基于遥感和GIS的黄土高原小流域植被退化研究[J].北京师范大学学报(自然科学版),2005,41(2):181-184. |
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| 作者姓名： | 索安宁 周睿 洪军 葛剑平 |
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| 作者单位： | 北京师范大学生命科学学院,100875,北京;北京师范大学生命科学学院,100875,北京;北京师范大学生命科学学院,100875,北京;北京师范大学生命科学学院,100875,北京 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金，高等学校博士学科点专项科研项目 |
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| 摘 要： | 利用遥感和GIS技术对黄土高原泾河小流域植被覆盖现状进行了分析,并以各种生境条件下最好自然植被覆盖为标准建立了小流域潜在植被覆盖分布图,在此基础上对流域植被退化状况和植被生态恢复进行了探讨.研究结果表明:泾河小流域植被退化相当严重,占流域面积60.06%的流域上中游宜林地区现仅保存森林和疏林共53 350 hm2,其66.93%已退化为其他植被覆盖;占流域面积39.94%的中下游宜灌草地区有150 250 hm2退化为植被覆盖稀疏的荒草地,此外还有79 500 hm2的各种植被覆盖类型被开垦为各种类型的农业用地,植被生态恢复任务艰巨.
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| 关 键 词： | 小流域 潜在植被 植被退化 泾河 |
| 修稿时间： | 2004年9月27日 |
A STUDY ON VEGETATION DEGRADATION IN THE WATERSHED OF THE LOESS PLATEAU BASED ON RS AND GIS |
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| SUO Anning,Zhou Rui,Hong Jun,GE Jianping.A STUDY ON VEGETATION DEGRADATION IN THE WATERSHED OF THE LOESS PLATEAU BASED ON RS AND GIS[J].Journal of Beijing Normal University(Natural Science),2005,41(2):181-184. |
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| Authors: | SUO Anning Zhou Rui Hong Jun GE Jianping |
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| Abstract: | Vegetation covering situation in Jinghe watershed is analyzed by RS and GIS techniques, and potential vegetation cover map is made out by the best vegetation cover of each condition. Based on this, the vegetation degrading situation and vegetation ecological restoring are studied. The results suggest as follows: the vegetation degrading situation is very serious. Only 53 350 hm 2 forest and sparse forest are conserved in the potential forest region of upper and middle river, which accounts for 60.06% of total watershed area, and 66.93% of the potent forest region has been degraded to inferior vegetation cover. The potential grass and shrub region lies in the down of the watershed, which accounts for 39.94% of total area, among these there are 150 250 hm 2 degraded grass land. 79 500 hm 2 natural shrub and grass changed to farm land. |
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| Keywords: | watershed potential vegetation vegetation degraded Jinghe |
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