| 陇东黄土高原土地利用、覆盖变化及驱动力分析 |
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| 引用本文： | 张希彪.陇东黄土高原土地利用、覆盖变化及驱动力分析[J].干旱地区农业研究,2006,24(2):143-147. |
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| 作者姓名： | 张希彪 |
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| 作者单位： | 陇东学院生命科学系,甘肃,庆阳,745000 |
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| 基金项目： | 教育部新世纪优秀人才支持计划;国家重点实验室基金;甘肃省教育厅科研项目;陇东学院校科研和教改项目 |
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| 摘 要： | 从土地利用和土地覆被的角度出发，利用RS和GIS技术，分析了20世纪最后15a该区土地利用和土地覆被变化在数量、结构和类型上的特点，并进一步分析了该区土地利用／土地覆被变化的驱动力，得出以下结论。15a间除建设用地和草地面积增加外，其他土地利用类型都呈现出不同程度减少。其中耕地减少了20691hm^2，主要转变为建设用地，且减少的耕地多为位置相对优越。产量较高的优质良田；林地减少了12269hm^2，主要转变为草地、早地和建设用地；草地的面积增加了33488hm^2，主要源自干林地和耕地的变化；交通建设用地高速增长，15a间增加了9278．8hm^2。该区土地利用和土地覆被变化的驱动力主要为自然因素、人口压力、经济因素及宏观政策等。
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| 关 键 词： | 土地利用 土地覆被 驱动力 陇东黄土高原 |
| 文章编号： | 1000-7601（2006）02-0143-06 |
| 收稿时间： | 2005-07-15 |
| 修稿时间： | 2005-07-15 |
Analysis on land-use/coverage change process and its driving forces on Loess Pleteau of east Gansu |
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| ZHANG Xi-biao.Analysis on land-use/coverage change process and its driving forces on Loess Pleteau of east Gansu[J].Agricultural Research in the Arid Areas,2006,24(2):143-147. |
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| Authors: | ZHANG Xi-biao |
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| Institution: | Department of Life Science, Longdong University, Qingyang, Gansu 745000 ,China |
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| Abstract: | By dint of RS and GIS technology,this paper analyzed the quantities,inner structure,types and spatial distribution features of land-use/coverage change(LUCC) on Loess Plateau of east Gansu in the last fifteen years in 20th century,and the driving forces of LUCC were discussed in detail.It was discovered that all types of land-use were decreased to some extent,except for the construction land and grassland.The cultivated land area was decreased by 20691hm2,which was generally fertile land with high quality in plain location and was mainly changed into construction land;the woodland area was decreased by 12269.1hm2,which was mainly changed into grassland,farmland and construction land;the grassland area was increased by 33488 hm2,which was mainly derive from the conversion of woodland and farmland;the construction land area was increased by 9278.8hm2 in fifteen years.The main driving forces of LUCC on Loess Plateau of east Gansu were the natural factors,the economic development,the population pressure,the adjustment of macro policies,and so on. |
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| Keywords: | GIS |
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