干旱区生态环境知识资源中心(Arid): 岷江上游干旱河谷区域空间变化的定量判定

Arid

	岷江上游干旱河谷区域空间变化的定量判定
其他题名	Long-term dynamics of dry valleys in the upper reaches of Mingjiang River,China
	杨兆平; 常禹; 布仁仓; 刘淼; 张文广
ISSN	1000-0933
出版年	2007
卷号	27 期号:8 页码:3250-3256
中文摘要	采用遥感和地理信息系统技术,准确界定了岷江上游干旱河谷的范围,在此基础上分析了岷江上游干旱河谷的面积变化及其边界分布海拔的最高上限在垂直方向上的抬升距离.结果表明,干旱河谷面积在不断扩大,由1974年的93140 hm~2扩大到2000的123078 hm2,其中1995～2000年间年变化率较1974～1995年有所降低;岷江上游干旱河谷的边界沿山体向上攀升非常迅速,1974岷江上游干旱河谷边界的最高上限海拔为3128 m,1995年为3167 m,较1974年抬升了39 m;2000年为3181 m,与1995年相比沿垂直方向向上抬升了14 m.1974到2000年间岷江上游干旱河谷边界最高上限沿垂直方向抬升了53 m,大约平均每年抬升2 m.为了遏制干旱河谷进一步扩大的趋势,必须加大植被恢复和生态建设力度.
英文摘要	The dry valleys in Hengduan Mountains of Southwesten China are located in unique geographical regions where ecological security and environment conservation are crucial for local sustainable development. Depending on the microclimatic ( thermal ) conditions, vegetation characteristics and soils, dry valleys in the region can be divided into three major types: the dry-hot valley, the dry-warm valley and the dry-cool valley. The dry valleys in the upper reaches of Minjiang River are the dry-cool valley with increasing population and rapid economy growth, serious soil erosion, droughts, deterioration, and desertification have greatly shaped the ecosystem structure, function, and service of the dry valleys across the region. In this study, we quantified the distribution of the Dry Valleys in the Upper Reaches of Mingjiang River, using geographic information system ( GIS ) and various remote sensing products. A special attention was paid to the changes of the total area of dry valleys and the upper boundaries of the valleys. We found that the total area of dry valleys increased from 93140 hm~2 in 1974 to 123078 hm~2 in 2000; and the change rate from 1995 to 2000 was lower than that from 1974 to 1995. The upper boundaries of the valleys also ascended rapidly with the upper limit of 3128 m in 1974, 3167 m in 1995 ( i.e. 39 m increase ), and 3181 m in 2000-an average of 2 m per year over the 26-year study period. We conclude that vegetation recovery and ecological constructions are urgently needed to slow the expansions of these dry valleys.
中文关键词	岷江 ; 干旱河谷 ; 景观动态 ; 空间变化 ; 定量方法
英文关键词	Mingjiang River Dry valley landscape dynamics spatial change quantitative method
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:2910659
来源机构	中国科学院沈阳应用生态研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221347
作者单位	中国科学院沈阳应用生态研究所, 沈阳, 辽宁 110016, 中国
推荐引用方式 GB/T 7714	杨兆平,常禹,布仁仓,等. 岷江上游干旱河谷区域空间变化的定量判定[J]. 中国科学院沈阳应用生态研究所,2007,27(8):3250-3256.
APA	杨兆平,常禹,布仁仓,刘淼,&张文广.(2007).岷江上游干旱河谷区域空间变化的定量判定.,27(8),3250-3256.
MLA	杨兆平,et al."岷江上游干旱河谷区域空间变化的定量判定".27.8(2007):3250-3256.