艾比湖流域绿洲化与荒漠化过程时空演变研究

doi:10.7522/j.issn.1000-694X.2013.00006

摘要/Abstract

摘要：

艾比湖流域生态格局是绿洲化过程和荒漠化过程相互作用的结果，以1990、2000年和2005年的遥感数据作为数据源，进行景观分类与制图，利用ArcGIS提取了艾比湖流域的绿洲和荒漠景观，基于占补平衡原理和变化检测，对比分析了绿洲退缩区和扩张区的数量特征和空间格局，并利用重心迁移模型得出绿洲和荒漠重心的变化趋势。结果表明：①1990—2005年间，研究区绿洲面积有所增加，荒漠面积呈减少趋势，绿洲退缩区的面积为1 853.75 km2，而绿洲扩张区的面积达到了1 912.13 km2。②研究时段内，绿洲的空间变化较大，其扩张区多位于艾比湖湖区周围以及艾比湖湖区西部以耕地为主的区域，绿洲退缩区主要位于研究区的东北部。③绿洲的重心向西南方向迁移了3.4196 km，同时，荒漠的重心向东北迁移，迁移距离为6.9999 km。

关键词: 艾比湖流域, 绿洲, 荒漠, 时空演变

Abstract:

The ecological pattern of the Ebinur Lake basin is the result of interaction between oasification and desertification processes. In this paper, satellite remote sensing data in three period (1990, 2001 and 2005) were taken as the basic data sources, and then ArcGIS was used to extract oasis and desert classification information. With the support of GIS techniques, the spatial-temporal change of oasis and desert in the Ebinur Lake basin from 1990 to 2005 were analyzed by change detection model, and then the oasis and desert barycenters were calculated. The results showed that: (1) From 1990 to 2005, the area of oasis increased, and the desert area decreased. The shrinking area of oasis was 1 853.75 km2, and the expanding area of oasis was 1 912.13 km2. (2) The spatial change of oasis was great, oasis expanding area was in the west of the Ebinur Lake basin and around the Ebinur Lake, and oasis shrinking area was mainly in the south-east of the Ebinur Lake basin. (3) The oasis barycenter transfer direction was south-west from 1990 to 2005, and the transfer distance was 3.4196 km, at the same time the desert barycenter transfer direction was north-east, the transfer distance was 6.9999 km.

Key words: Ebinur Lake basin, oasis, desert, spatial-temporal change

中图分类号:

X144

谢霞1,2，塔西甫拉提·特依拜2,3. 艾比湖流域绿洲化与荒漠化过程时空演变研究[J]. 中国沙漠, 2013, 33(1): 38-45.

XIE Xia1,2, Tashpolat Tiyip2,3. Spatio-temporal Change of Oasis and Desert in the Ebinur Lake Basin in Xinjiang, China[J]. JOURNAL OF DESERT RESEARCH, 2013, 33(1): 38-45.

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