CAJ | 학술논문

为了对福建省长汀县水土流失进行动态监测，并对其治理成效进行评价，基于Landsat卫星影像和遥感信息技术，将裸土指数（ NDSI）和不透水面指数（ NDISI）相结合，提取长汀县2001—2013年的地表裸土信息，从而对该县近12 a来的地表裸土进行时空变化分析；同时基于遥感生态指数（ RSEI）对长汀县裸土变化的生态响应进行分析。结果表明：长汀县地表裸土面积在12 a间有了大幅度的减少；而生态状况则随之好转，生态级别为优、良等级所占的面积比例均有上升。回归分析表明，各年份的地表裸露度与RSEI生态值都呈现明显的线性负相关关系，说明长汀县近12 a生态质量的改善与地表裸土面积的大量减少有直接的关系。
위료대복건성장정현수토류실진행동태감측，병대기치리성효진행평개，기우Landsat위성영상화요감신식기술，장라토지수（ NDSI）화불투수면지수（ NDISI）상결합，제취장정현2001—2013년적지표라토신식，종이대해현근12 a래적지표라토진행시공변화분석；동시기우요감생태지수（ RSEI）대장정현라토변화적생태향응진행분석。결과표명：장정현지표라토면적재12 a간유료대폭도적감소；이생태상황칙수지호전，생태급별위우、량등급소점적면적비례균유상승。회귀분석표명，각년빈적지표라로도여RSEI생태치도정현명현적선성부상관관계，설명장정현근12 a생태질량적개선여지표라토면적적대량감소유직접적관계。
To investigate and monitor the current situation of soil erosion in Changting county,and evaluate the progress of water-soil conservation work,this study combined the normalized difference soil index ( NDSI) and the normalized difference impervious surface index ( NDISI) to extract bare soil information, based on the time-series Landsat images of Changting county and remote sensing technology,and then analyzed the spatiotemporal variation of bare soil distribution from 2001 to 2013.Meanwhile,an ecological anal-ysis of Changting county based on the remote sensing ecological index ( RSEI) was conducted.Results show that the area of bare soil in Changting county has been greatly reduced,and the ecological status has been improved.The proportion of excellent and good eco-logical grades has raised,while the low ecological grades have an overall downward trend.Analysis of regression showed that surface exposed degree and RSEI value have presented a significant linear negative relationship.This clearly shows that the improvement of ecological quality has a direct relation with the substantial reduction of exposed bare soil areas of Changting county in this 12 years.