摘要
本文基于遥感影像资料和社会统计数据,采用随机森林对万荣县1990年~2017年土地利用动态变化特征及驱动力进行分析.研究结果表明,万荣县主要以耕地和林草地为主,并且不同阶段土地利用变化存在差异.1999年~2008年是各类土地变幅最为剧烈的一个时段,尤其是耕地(-127.62 km^2)和林草地(74.73 km^2),而2008年~2017年各类土地变幅已开始缓和.1990年~1999年及2008年~2017年水域的变率更快,分别达到-5.98%和-3.56%,而未利用地在1999年~2008年变率更快(9.33%).近30年万荣县各类用地之间转化频繁,并有越来越剧烈的态势,其中耕地与其他用地类型尤其是林草地和建设用地之间的相互转换更为突出.各时段的驱动力虽存在一定差异,但人口增长与转移、经济活动以及退耕还林政策是万荣县土地变化的主要推动力量.此外,气候变化也起到一定作用.研究结果可为当地土地利用规划及管理提供决策依据.
Based on remote sensing images and social statistical data,this paper analyzes the dynamic characteristics and driving forces of land use in Wanrong county from 1990 to 2017 by using Random Forest Algorithm.The results show that Wanrong county is dominated by cultivated land and forest and grass land,and there are differences in land use change at different stages.1999?2008 is the most intense period of all kinds of land,especially cultivated land(-127.62 km^2)and forest grassland(74.73 km^2),and the land use change have begun to mitigable in 2008~2017.In 1990~1999 and 2008?2017,the variability of water area was faster,reaching-5.98%and-3.56%respectively,while the unused land was faster in 1999?2008(9.33%).In the past 30 years,the conversion of various types of land in Wanrong county has been frequent.Among them,the conversion between cultivated land and other land types,especially forest and grass land and construction land,is more prominent.Although there are some differences in the driving force of each period,population growth and transfer,economic activities and the policy of returning farmland to forests are the main driving forces for land change in Wanrong county.In addition,climate change also plays an important role in land change.The results can provide decision-making basis for local land use planning and management.
作者
刘焕才
郭俊莉
张洁
李曼
LIU Huan-cai;GUO Jun-li;ZHANG Jie;LI Man(College of Geographical Science,Shanxi Normal University,Linfen 041000,Shanxi,China;Modem College of Humanities and Science,Shanxi Normal University,Linfen 041000,Shanxi,China)
出处
《山西师范大学学报（自然科学版）》
2020年第1期92-98,共7页
Journal of Shanxi Normal University(Natural Science Edition)
基金
山西省高校哲学社会科学研究项目(20162205)
山西师范大学校自然科学基金项目(ZR1713).
关键词
万荣县
随机森林
土地利用
土地转移
Wanrong county
random forest algorithm
land use
land transfer
