人民长江
人民長江
인민장강
YANGTZE RIVER
2014年
17期
18-22
,共5页
植被覆盖%NDVI%趋势分析%变化矢量分析%长江上游
植被覆蓋%NDVI%趨勢分析%變化矢量分析%長江上遊
식피복개%NDVI%추세분석%변화시량분석%장강상유
vegetation cover%NDVI%trend analysis%change vector analysis%upper Yangtze River
为了研究2000年退耕还林还草和天然保护工程的实施对长江上游区域植被覆盖的影响,以MODIS/NDVI为基础遥感数据,将趋势分析法与变化矢量分析法相结合,对2001~2010年长江上游植被覆盖时空变化特征进行分析。研究结果显示,10 a间流域年均NDVI呈略微增加趋势,其中嘉陵江流域NDVI上升趋势最明显,金沙江、大渡河、岷沱江流域NDVI增加趋势最不明显；大部分地区植被覆盖处于恢复态势,在这些地区,大部分植被覆盖变化属于轻度或中度恢复型。
為瞭研究2000年退耕還林還草和天然保護工程的實施對長江上遊區域植被覆蓋的影響,以MODIS/NDVI為基礎遙感數據,將趨勢分析法與變化矢量分析法相結閤,對2001~2010年長江上遊植被覆蓋時空變化特徵進行分析。研究結果顯示,10 a間流域年均NDVI呈略微增加趨勢,其中嘉陵江流域NDVI上升趨勢最明顯,金沙江、大渡河、岷沱江流域NDVI增加趨勢最不明顯；大部分地區植被覆蓋處于恢複態勢,在這些地區,大部分植被覆蓋變化屬于輕度或中度恢複型。
위료연구2000년퇴경환림환초화천연보호공정적실시대장강상유구역식피복개적영향,이MODIS/NDVI위기출요감수거,장추세분석법여변화시량분석법상결합,대2001~2010년장강상유식피복개시공변화특정진행분석。연구결과현시,10 a간류역년균NDVI정략미증가추세,기중가릉강류역NDVI상승추세최명현,금사강、대도하、민타강류역NDVI증가추세최불명현；대부분지구식피복개처우회복태세,재저사지구,대부분식피복개변화속우경도혹중도회복형。
In order to study the influence of conversion of cropland to forest and grass and the protection project of natural for-est on vegetation cover in upper Yangtze River from 2001 to 2010, the trend analysis method and change vector analysis method were employed to investigate the temporal-spatial change of vegetation cover based on the MODIS/NDVI data. The results re-vealed that the annual NDVI of the upper Yangtze River showed a slightly increasing trend during the 10 years. The most signifi-cant increasing trend was in Jialing River Basin, while the most slightly increasing trend existed in Jinsha River Basin, Dadu Riv-er Basin and Min-tuo River Basin. The vegetation cover was experiencing restoration in most of the basin. The vegetation cover change showed a light or moderate restoration in most of vegetation cover restoration regions.
