摘要
传统的分析方法只能对土地利用转移矩阵做概括性的分析,往往不能深入挖掘决定土地利用变化格局的潜在过程信息。该文以转移矩阵为基础,从统计学的角度将土地利用转移过程分为系统转移和随机转移。用该方法对长江上游土地利用变化进行分析,得出最具优势的转换信息:耕地和林地间的相互转换,林地和草地间的相互转换,耕地流失为建设用地。耕地与草地间的转换量虽然很大,但不具有系统性转换优势。该方法能快速挖掘最具优势的土地利用转移信息,有助于科研人员将土地利用格局和变化过程联系起来,为土地资源管理提供有用信息。
The transition matrix is widely used for land use change analysis,which may fail to gain as much insight as possible concerning the potential processes that determine a pattern of land change.This paper introduces a statistical method to help separate land use transformations to random and systematic transitions.A land use transition is random if a land class gains from other classes in proportion to the availability of those other losing classes,or if a class loses to other classes in proportion to the size of those other gaining classes.Any large deviation from those proportions is referred to as systematic transition.Use this method to analyze land use changes in the upper reaches of Yangtze River during 1980~2000,and the results show that the most dominant signals of land use change include:the exchange between cropland and woodland,the exchange between woodland and grassland and the conversion of cropland to built-up areas.Although the quantity of transitions between cropland and grassland is large,they are not attributed to dominant signals of change.In conclusion,this method is simple and practical,which enables scientists to focus research on the most important land transitions,and helps them to build relationship between land use patterns and their transition processes quickly.
出处
《遥感信息》
CSCD
2014年第2期100-105,共6页
Remote Sensing Information
基金
中国科学院对外合作重点项目(GJHZ1003)
关键词
土地利用
信息挖掘
系统转移
随机转移
长江上游
land use
information mining
systematic transition
random transition
upper reaches of Yangtze River
