淮河流域城市扩张对耕地流失的影响  

Impact of Urban Expansion on Cropland Loss in the Huaihe River Basin

作　　者：郑金婵 田静 杨永菊[1] 刘亮 王兵 乔旭宁[1,2] ZHENG Jinchan;TIAN Jing;YANG Yongju;LIU Liang;WANG Bing;QIAO Xuning(School of Surveying and Land Information Engineering,Henan Polytechnic University,Jiaozuo 454003,China;Research Centre of Arable Land Protection and Urban-rural High-quality Development of Yellow River Basin,Henan Polytechnic University,Jiaozuo 454003,China;School of Geographic Sciences,Shanxi Normal University,Taiyuan 030000,China;Henan Province Land Space Survey and Planning Institute,Zhengzhou 450016,China)

机构地区：[1]河南理工大学测绘与国土信息工程学院,河南焦作454003 [2]河南理工大学黄河流域耕地保护与城乡高质量发展研究中心,河南焦作454003 [3]山西师范大学地理科学学院,太原030000 [4]河南省国土空间调查规划院,郑州450016

出　　处：《地域研究与开发》2024年第5期152-158,165,共8页Areal Research and Development

基　　金：国家自然科学基金项目(41971274);2018年河南省财政土地类科研项目(豫国土资发〔2018〕125号-1);河南省高校科技创新团队支持计划项目(22IRTSTHN008)。

摘　　要：以淮河流域8个典型城市为研究区,基于30 m×30 m中国土地覆盖数据集,量化城市扩张和耕地流失的幅度、速度、模式和动态,探讨不同规模城市扩张对耕地流失影响的差异性。结果表明:1990—2021年研究区城市面积扩张了84.32%,扩张速率先减小后增大;耕地流失了8.68%,流失速率先减小后增加。耕地大幅度转变为城市用地,占新增城市用地的98.97%,占总损失耕地的83.62%,耕地持续碎片化。城市扩张对耕地流失的依赖度下降、贡献度上升。特大城市耕地流失峰值比大城市出现早。Eight typical cities in the Huaihe River basin were taken as the study area.Based on the 30 m×30 m Chinese land cover data set,the magnitude,speed,mode and dynamics of urban expansion and cropland loss were quantified,and the differences in the impact of urban expansion on cropland loss in different scales were discussed.The results showed that during 1990—2021,the urban area of the study area expanded by 84.32%,with an expansion rate that first decreased and then increased.The loss of arable land increased by 8.68%,and the loss rate also decreased and then increased.The cropland has been transformed into urban land by a large margin,accounting for 98.97%of the newly expanded urban land and 83.62%of the total lost cropland.The cropland continues to be fragmentation.The dependence and contribution of urban expansion on farmland loss have decreased and then increased.The peak of farmland loss in large cities occurs earlier than in small and medium-sized cities,and the relative consumption of farmland by urban expansion is lower than in small and medium-sized cities.

关 键 词：城市扩张 耕地流失 标准差椭圆 景观指数 淮河流域 

分 类 号：F301.21[经济管理—产业经济]