DOI: 10.1016/j.jag.2014.05.008
Scopus记录号: 2-s2.0-84904742127
论文题名: Oasis dynamics change and its influence on landscape pattern on Jinta oasis in arid China from 1963a to 2010a: Integration of multi-source satellite images
作者: Xie Y ; , Gong J ; , Sun P ; , Gou X
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2014
卷: 33, 期: 1 起始页码: 181
结束页码: 191
语种: 英语
英文关键词: Arid area
; Jinta oasis
; Landscape pattern
; Multi-source satellite images
; Oasification
; Spatiotemporal processes
Scopus关键词: arid region
; ecotone
; land cover
; land use change
; Landsat multispectral scanner
; Landsat thematic mapper
; landscape change
; numerical model
; oasis
; remote sensing
; satellite imagery
; spatial distribution
; spatiotemporal analysis
; time series analysis
; China
; Gansu
; Hexi Corridor
; Jinta Oasis
英文摘要: As one of the vital research highlights of global land use and cover change, oasis change and its interaction with landscape pattern have been regarded as an important content of regional environmental change research in arid areas. Jinta oasis, a typical agricultural oasis characterized by its dramatic exploitation and use of water and land resources in Hexi corridor, northwest arid region in China, was selected as a case to study the spatiotemporal oasis change and its effects on oasis landscape pattern. Based on integration of Keyhole satellite photographs, KATE-200 photographs, Landsat MSS, TM and ETM+ images, we evaluated and analyzed the status, trend and spatial pattern change of Jinta oasis and the characteristics of landscape pattern change by a set of mathematical models and combined this information with landscape metrics and community surveys. During the period of 1963a-2010a, Jinta oasis expanded gradually with an area increase of 219.15 km2, and the conversion between oasis and desert was frequent with a state of "imbalance-balance-extreme imbalance conditions". Moreover, most of the changes took place in the ecotone between oasis and desert and the interior of oasis due to the reclamation of abandoned land, such as Yangjingziwan and Xiba townships. Furthermore, the area, size and spatial distribution of oasis were influenced by human activities and resulted in fundamental changes of oasis landscape pattern. The fractal characteristics, dispersion degree and fragmentation of Jinta oasis decreased and the oasis landscape tended to be simple and uniform. Oasis change trajectories and its landscape pattern were mainly influenced by water resource utilization, policies (especially land policies), demographic factors, technological advancements, as well as regional economic development. We found that time series analysis of multi-source remote sensing images and the application of an oasis change model provided a useful approach to monitor oasis change over a long-term period in arid area. It is recommended that the government and farmers should pay more attention to the fragility of the natural system and the government should enhance the leading role of environmental considerations in the development process of oasis change, particularly with respect to the utilization of the limited water and land resources in arid China. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79675
Appears in Collections: 气候变化事实与影响
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作者单位: MOE Key Laboratory of Western China's Environmental Systems, Research School of Arid Environment and Climate Change, Lanzhou University, Lanzhou 730000, China
Recommended Citation:
Xie Y,, Gong J,, Sun P,et al. Oasis dynamics change and its influence on landscape pattern on Jinta oasis in arid China from 1963a to 2010a: Integration of multi-source satellite images[J]. International Journal of Applied Earth Observation and Geoinformation,2014-01-01,33(1)