干旱区生态环境知识资源中心(Arid): 黄河源区土地沙漠化的动态变化及成因分析以玛多县为例

Arid

	黄河源区土地沙漠化的动态变化及成因分析以玛多县为例
其他题名	Study on Dynamic Changes of Land Desertification and Casal Analysis in Source Region of Yellow Rivera Case Study of Maduo County
	封建民; 王涛; 齐善忠; 谢昌卫
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2004
卷号	18 期号:3 页码:141-145
中文摘要	玛多县地处黄河源区，是黄河重要的水分涵养地，其生态作用对黄河的安危有直接的影响。近年来，在自然因素和人为因素的共同作用下，区内的生态环境急剧退化，表现为土地沙漠化、草场退化和水土流失加剧等过程。在软硬件系统支持下应用GIS和遥感技术，结合野外调查和室内分析，通过对1990年和2000年两期TM影像进行解译，对玛多县沙漠化现状及其发展趋势进行了系统研究。研究结果表明，玛多县沙漠化面积已达2 388．06 km~2，占全县总面积的9．65％。1990年以来沙漠化以每年4．1％的速率递增，沙漠化急剧发展的区域主要集中在黑河乡的赫拉、尕拉到黄河乡的热曲、江旁一线，造成这一现象的原因是多方面的，包括地质构造因素、气候变化、人类强度的经济活动和鼠害等。
英文摘要	Maduo county located in the source region of the Yellow River, and its eco-environment and its signif icance for the hydrology have a strong influence on the hydrological conditions and the eco-environment of the middle and lower river reaches, but its eco-environment is very fragile for the especial geographic location in recent years, and the eco-environment degrades very quickly influenced by natural factor together with human being fac tor) in which desertification is main aspect of environment changing in this region. The eco-environmental infor mation system in Maduo county grassland is worked out supported by GIS and RS, as well as field investigation and indoor analysis, based on knowledge the classification is worked out and multi-source data is gathered. The result indicated that the total desertified land area increased to 2 388. 06 km~2 in 2000 from 1 592. 89 km~2, with an nually increasing rate of 4. 1%, among which the light degree desertification land increased from 564. 53 km~2 to 827. 57 km~2, occupied 34. 67% of the whole desertified land; the middle degree increased from 479. 86 km~2 to 971. 28 km~2, occupied 41. 05% ; the serious degree increased from 398. 83 km~2 to 420. 63 km~2,occupied 17. 61% and the very serious increased from 149. 67 km~2 to 168. 58 km~2, occupied 6. 67%. Thus it can be seen that deser tification extended very quickly in this region, especially the middle and the light degree. There are many reasons contributed to the desertification process, of which the main ones included the geological environmental evolution, regional climatic change, human irrational activities (the main is excessive stock-raising) and rodent damage.
中文关键词	黄河源区
英文关键词	the source region of the Yellow River
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:1628114
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205478
作者单位	中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	封建民,王涛,齐善忠,等. 黄河源区土地沙漠化的动态变化及成因分析以玛多县为例[J]. 中国科学院西北生态环境资源研究院,2004,18(3):141-145.
APA	封建民,王涛,齐善忠,&谢昌卫.(2004).黄河源区土地沙漠化的动态变化及成因分析以玛多县为例.水土保持学报,18(3),141-145.
MLA	封建民,et al."黄河源区土地沙漠化的动态变化及成因分析以玛多县为例".水土保持学报 18.3(2004):141-145.