Urban Expansion and Farmland Loss in Beijing during 1980-2015
Urban Expansion and Farmland Loss in Beijing during 1980-2015
复制标题
1980-2015年北京城市扩张与耕地流失
DOI：
10.3390/su10113927
复制
发表时间：
2018-11-01
期刊：
影响因子：
3.9
通讯作者：
Min, Mingzhe
中科院分区：
文献类型：
--
作者：
Hu, Yingjie;Kong, Xiangbin;Min, Mingzhe
分析城市土地扩张与耕地流失是充分认识中国快速城市化进程中土地利用变化的基础。研究发现，近35年来，北京市城市扩张和耕地流失均经历了高速和低速两个阶段，其空间格局具有一致性，城市新增用地以耕地为主。1980-1990年、1990-2000年、2000-2010年和2010-2015年，北京市城市扩张造成的耕地流失面积分别为12.6 km(2)/年、39.86 km(2)/年、23.38 km(2)/年和41.11 km(2)/年。1980-2015年，北京市城市扩张持续倾向于消耗高于平均水平的优质耕地。与此同时，尽管北京城市扩张高度依赖于占用耕地，但随着时间的推移，城市扩张对耕地消耗的依赖程度有所下降。城市扩张对耕地流失的贡献在1980—2010年间呈上升趋势，之后呈下降趋势。为了保护耕地不受城市扩张的影响，我们呼吁加大力度提高城市土地利用效率，严格控制城市扩张面积。
The analysis of urban land expansion and farmland loss is essential to adequately understand the land use change in a rapidly urbanizing China. We found that both urban expansion and farmland loss in Beijing experienced high- and low-speed stages and their spatial patterns were consistent during the past 35 years as most of the newly expanded urban land was converted from farmland. The area of farmland loss by urban expansion in Beijing is 12.6 km(2)/year, 39.86 km(2)/year, 23.38 km(2)/year, and 41.11 km(2)/year during the period of 1980-1990, 1990-2000, 2000-2010, and 2010-2015, respectively. The urban expansion in Beijing continuously preferred to consume above average quality farmland during 1980-2015. Meanwhile, although the urban expansion in Beijing was highly dependent on occupying farmland, the dependence of urban expansion on farmland consumption has declined over time. However, the contribution of urban expansion on farmland loss increased during 1980-2010 and decreased afterward. In order to protect the farmland from urban expansion, we call for more effort to improve the urban land use efficiency with rigid controls over areas of urban expansion.