Evaluation of landscape changes and ecological degradation by GIS in arid regions: a case study of the terminal oasis of the Shiyang River, northwest China
文献类型：期刊论文
| 作者 | Li, XY; Xiao, DN; He, XY; Chen, W; Song, DM; He, XY, Chinese Acad Sci, Inst Appl Ecol, 72 Wenhua Rd, Shenyang 110016, Peoples R China |
| 刊名 | ENVIRONMENTAL GEOLOGY
 |
| 出版日期 | 2007 |
| 卷号 | 52期号:5页码:947-956 |
| 关键词 | Landscape Changes Ecological Degradation Water Resource Gis |
| ISSN号 | 0943-0105 |
| 英文摘要 | The development and utilization of water and land resources in the Shiyang River basin are the highest among the inland rivers in northwestern China. Using GIS and the landscape structure analysis program FRAGSTATS, landscape metrics of a study area in the lake-district in Minqin Oasis in the lower reaches of Shiyang River basin were calculated and analyzed based on TM images from 1987 to 2001 at class level and landscape level, respectively. Transformation matrix of the landscape mosaics was also examined. The driving forces of landscape changes were analyzed, including the dynamics of runoff and groundwater resources and their exploitation, and influences of policies and market economy. The results showed that: ( 1) Patch number of farmland and desert decreased, but their mean patch area increased, indicating that reclamation and desertification was very serious in the study area. Contagion index for oasis increased and edge density and landscape diversity were reduced. ( 2) Farmland and desert areas have enlarged by 1,520.46 and 4,941.27 hm(2), respectively. This increase was at the cost of woodland and grassland, which shrank by 1,520.46 and 4,941.27 hm(2), respectively. ( 3) The net utilization of surface water decreased by 50% in the last 10 years, and dropped to 22.3 x 10(6) m(3) in the later 1990s. Exploitation of groundwater increased remarkably, up to 80 x 10(6) m(3) per year in the last 5 years. ( 4) The capability of the economic structure to withstand pressures of the market economy has depressed distinctly because of the simplified planting pattern, which is dominated by salinity-enduring cash crops, such as cotton. Based on the above analysis, strategies of ecological reconstruction in the lake-district were suggested. |
| 学科主题 | Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000245824300011 |
| 公开日期 | 2011-09-23 |
| 源URL | [http://210.72.129.5/handle/321005/54725]  |
| 专题 | 沈阳应用生态研究所_沈阳应用生态研究所 |
| 通讯作者 | He, XY, Chinese Acad Sci, Inst Appl Ecol, 72 Wenhua Rd, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, XY,Xiao, DN,He, XY,et al. Evaluation of landscape changes and ecological degradation by GIS in arid regions: a case study of the terminal oasis of the Shiyang River, northwest China[J]. ENVIRONMENTAL GEOLOGY,2007,52(5):947-956. |
| APA | Li, XY,Xiao, DN,He, XY,Chen, W,Song, DM,&He, XY, Chinese Acad Sci, Inst Appl Ecol, 72 Wenhua Rd, Shenyang 110016, Peoples R China.(2007).Evaluation of landscape changes and ecological degradation by GIS in arid regions: a case study of the terminal oasis of the Shiyang River, northwest China.ENVIRONMENTAL GEOLOGY,52(5),947-956. |
| MLA | Li, XY,et al."Evaluation of landscape changes and ecological degradation by GIS in arid regions: a case study of the terminal oasis of the Shiyang River, northwest China".ENVIRONMENTAL GEOLOGY 52.5(2007):947-956. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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