基于遥感的辽中南城市群建设用地扩张及其占用耕地的时空特征  

Spatial-temporal characteristics of construction land expansion and occupation of cultivated land in urban agglomeration of central and southern Liaoning Province based on Remote Sensing

作　　者：任晓燕 何艳芬[1] 王宗明[2] REN Xiaoyan;HE Yanfen;WANG Zongming(College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China;Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China)

机构地区：[1]西北大学城市与环境学院,西安710127 [2]中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室,长春130102

出　　处：《国土资源遥感》2020年第3期98-105,共8页Remote Sensing for Land & Resources

基　　金：中国科学院战略性先导科技专项“地球大数据科学工程”课题(编号:XDA19040500)资助。

摘　　要：以工业化和城市化较为发达的辽中南城市群为研究区,基于遥感数据,对城乡建设用地扩张及其占用耕地的特征进行研究,结果表明:1990—2015年间,辽中南城市群建设用地总量增加了1942.07 km^2,增长了30.52%,其中64.68%的新增建设用地来源于对耕地的侵占;城市间建设用地扩张差异明显,不同时期的数据对比表明辽中南地区建设用地扩张经历了先加速后减速的波动扩张过程,扩张占用的耕地面积先升高后下降,占用耕地的比例总体呈下降趋势;研究期内辽中南城市群耕地面积持续减少,其中79.76%的流失耕地转向了建设用地。虽然由于农业科技的进步,目前耕地面积的减少对辽中南地区粮食产量的影响较小,但部分城市因建设占用耕地已经引致粮食减产,需要引起重视。This study observed relatively developed urbanized and industrialized urban agglomeration in central and southern Liaoning.The authors used remote sensing data as the information source to study the expansion of construction land and the characteristics of its occupation of cultivated land.The results show that,from 1990 to 2015,the total land use for construction of urban agglomeration in central and southern Liaoning increased by 1942.07 km^2,with an increasing rate of 30.52%,in which 64.68%of new construction land was derived from the occupation of cultivated land.The difference in the expansion of construction land among cities was obvious.The comparison of data in different periods shows that the expansion rate of construction land in central and southern Liaoning had a turning point.During the study period,the area of cultivated land in central and southern Liaoning continued to decrease,and 79.76%of its loss was converted into construction land.Due to the advancement of agricultural science and technology,the current reduction in cultivated land area has a small impact on grain production in central and southern Liaoning.However,some cities have caused food production reduction due to occupation of cultivated land,which requires further attention.

关 键 词：辽中南城市群 建设用地扩张 占用耕地 遥感 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]