Land Use and Cover Changes in Zhangye Oasis, Northwest China

摘要：

The land use and land cover changes of Zhangye Oasis are studied using two scenes of Landsat TM image acquired in 1987 and 2002. The Oasis locates to the Hexi Corridor of Cansu province, Northwest China. The results show that the ecosystem in Zhangye Oasis deteriorated and desertification became more severe from 1987 to 2002. Farmland and alpine vegetation was fragmentized and diminished,while desert shrub and non-vegetation areas increased. Broadleaf forests increased because of administrative afforestation. From 1987 to 2002, Zhangye Oasis un-derwent a rapid vegetation degradation process. Based on Markov model, it can be predicted that the situation could be exacerbated if there is no effective measures to impede desertifica-tion by 2017.

关键词： Desertification Vegetation degradation Landscape structure Markov model

作者: Zhang Mingjuan Xu Huiqiang Xu Chi Dong Yibo Liu Maosong

作者单位: Department of Landscape Architecture, Nanjing Agriculture University, Nanjing, China, 210095 School Jiangsu Wildlife Conservation Station,Nanjing,China,210093 School of Life Science,Nanjing University,Nanjing,China,210093

会议类型: 国际会议

会议名称: Workshop on Degraded Ecosystem Restoration in Arid and Semi-arid Northern China-Mongolia Region(2006年中国北方-蒙古干旱半干旱地区退化生态系统恢复与重建国际学术研讨会)

会议地点: 银川

会议语种:英文

页码: 117-123

在线出版日期: 2006-06-20（万方平台首次上网日期，不代表论文的发表时间）