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	石羊河下游民勤绿洲变化的人文机制研究
其他题名	The human mechanism research of Minqin Oasis change in the lower reaches of the Shiyang River
	杨永春; 李吉均; 陈发虎; 李瑞成; 李丁; 常跟应; 李忆春
发表日期	2002
ISSN	1000-0585
卷号	21 期号:4 页码:449-458
中文摘要	本文根据社会调查资料分析了甘肃省河西地区石羊河下游民勤绿洲变化的趋势及其影响，进而从用水行为和水量均衡角度讨论了绿洲变化的人文作用机制，认为石羊河流域下游绿洲变化与传统农业外延式扩张机制密切相关，而传统农业扩张机制由于各种因素的制约在短时期内难以打破。而不打破导致绿洲环境恶化的人文机制，任何试图扭转此类地区绿洲环境恶化趋势的措施都可能是无效的。
英文摘要	Based on social investigation material this paper analyses oasis change and its impact on Minqin Basin at the lower reaches of the Shiyang River in Hexi Corridor of western China. Furthermore, it discusses human mechanism caused oasis change in the context of human behavior of water use and quantity balance of water use. Minqin oasis change is closely related to the expanding mechanism of traditional agriculture which can not be easily broken in a limited period of time. However, if the human mechanism leading to environmental deterioration continues to exist, all human actions attempting to turn back the trend of the oasis change in the same area will have little effect. The worse trend of Minqin Oasis in the lower reaches of the Shiyang River is the process of the rapid decline of underground water level, desertification, salinizification-alkalization and degeneration of vegetative cover that have greatly affected the agricultural production since the 1950s. The human factor caused the oasis change is chiefly due to the unlimited demand of agricultural water use incited by the enlargement of farmland resulting from rapid population increase of the Shiyang drainage basin. The decrease of upstream runoff and the increase of water requirements have explained the deline of underground water level and the worsening of the underground water quality that caused the rapid salinizification and the rapid decline of the crop production, constituting one of the main reasons for farmland enlargement. All of these factors mentioned above are attributed to the degenerated vegetative cover and the disaster of the ecosystem.
关键词	民勤盆地绿洲变化人文机制石羊河下游
英文关键词	Minqin Basis;oasis change;human mechanism;lower reaches of Shiyang River
语种	中文
WOS研究方向	Environmental Sciences & Ecology
WOS类目	ENVIRONMENTAL SCIENCES
CSCD记录号	CSCD:979888
来源期刊	地理研究
来源机构	兰州大学 ; 中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/1871
推荐引用方式 GB/T 7714	杨永春,李吉均,陈发虎,等. 石羊河下游民勤绿洲变化的人文机制研究[J]. 兰州大学, 中国科学院青藏高原研究所,2002,21(4):449-458.
APA	杨永春.,李吉均.,陈发虎.,李瑞成.,李丁.,...&李忆春.(2002).石羊河下游民勤绿洲变化的人文机制研究.地理研究,21(4),449-458.
MLA	杨永春,et al."石羊河下游民勤绿洲变化的人文机制研究".地理研究 21.4(2002):449-458.