CAJ | 학술논문

利用1990－2011年 Landsat 数据，结合了4个气象站点的年降水量、年均温数据，基于垂直地带性特征和荒漠植被指数对艾比湖保护区的遥感图像进行了专家知识决策树分类。研究了典型绿洲－荒漠交错带的荒漠草地等地物近20年的面积变化、NDVI 及其与气候因子的关系。结果表明，1）近20年间植被类型的 NDVI 值大致呈山前荒漠＞荒漠草原＞盐生草甸＞草本沼泽＞荒漠的规律。2）近20年降水量与温度都呈上升趋势，植被 NDVI 和气温主体呈不显著负相关，与降水主体呈显著正相关。3）研究区在保护区建立前，荒漠植被退化十分严重，荒漠植被面积大量减小，大多向不可用地类转化，保护区建立后的生态环境有了很大改善。可见政府的政策导向对荒漠生态环境具有重要作用。
이용1990－2011년 Landsat 수거，결합료4개기상참점적년강수량、년균온수거，기우수직지대성특정화황막식피지수대애비호보호구적요감도상진행료전가지식결책수분류。연구료전형록주－황막교착대적황막초지등지물근20년적면적변화、NDVI 급기여기후인자적관계。결과표명，1）근20년간식피류형적 NDVI 치대치정산전황막＞황막초원＞염생초전＞초본소택＞황막적규률。2）근20년강수량여온도도정상승추세，식피 NDVI 화기온주체정불현저부상관，여강수주체정현저정상관。3）연구구재보호구건립전，황막식피퇴화십분엄중，황막식피면적대량감소，대다향불가용지류전화，보호구건립후적생태배경유료흔대개선。가견정부적정책도향대황막생태배경구유중요작용。
This research investigated the vegetation of the Ebinur Lake Nature Reserve,Xinjiang,a typical des-ert-oasis ecotonein northen China.After radiometric and geometric correction,Landsat remote sensing images from 1990,1998 and 2011 were used for the study.The classification of land cover based on a decision tree ap-proach was implemented using the normalized difference vegetation index (NDVI)and the vertical zonal vegeta-tion distribution.Annual rainfall and the average annual temperature data of four meteorological stations were utilized.The NDVI was generally highest in the piedmont desert grass and lowest in desert areas;piedmont desert grass>desert steppe>saline meadow>herbaceous swamp>desert.The area of land influenced by salin-ization appeared to be increasing.Over the 20 year period mean temperatures showed an increasing trend,con-sistent with the global warming trend.Temperature did not influence NDVI but rainfall was positively correla-ted with NDVI.It was concluded that the establishment of the Ebinur Lake Nature Reserve has significantly reduced land degradation and that government policy plays a significant role in the protection of desert environ-ments.