林业调查规划
林業調查規劃
임업조사규화
FOREST INVENTORY AND PLANNING
2013年
5期
10-13
,共4页
陈骏%沈盈佳%曾建军%陈严武%黎亚波
陳駿%瀋盈佳%曾建軍%陳嚴武%黎亞波
진준%침영가%증건군%진엄무%려아파
植被覆盖度%空间变化%归一化植被指数(NDVI)%RS%昆明市
植被覆蓋度%空間變化%歸一化植被指數(NDVI)%RS%昆明市
식피복개도%공간변화%귀일화식피지수(NDVI)%RS%곤명시
vegetation coverage%space variation%NDVI%RS%Kunming city
植被覆盖度是反映植被状况的重要因素,以1988、1996、2000、2006和2010年5个时相的TM和ETM+影像数据,利用像元二分法模型计算了昆明市植被覆盖度并分析其时空变化。结果表明,1988~2010年的22年间,昆明市的植被覆盖度变化明显,平均植被覆盖度从56.2%下降到50.7%,降幅达5.5%;特别是官渡区和呈贡新区变化幅度最为显著,降幅分别为12.3%和6%。按时段分析结果,1988~2000年昆明市整体植被覆盖度呈下降趋势,2000~2010年呈增长趋势。分析认为,城市的发展与扩建导致植被覆盖度减少;应注重城市绿化建设,新建公园与广场,使城市植被得到恢复。
植被覆蓋度是反映植被狀況的重要因素,以1988、1996、2000、2006和2010年5箇時相的TM和ETM+影像數據,利用像元二分法模型計算瞭昆明市植被覆蓋度併分析其時空變化。結果錶明,1988~2010年的22年間,昆明市的植被覆蓋度變化明顯,平均植被覆蓋度從56.2%下降到50.7%,降幅達5.5%;特彆是官渡區和呈貢新區變化幅度最為顯著,降幅分彆為12.3%和6%。按時段分析結果,1988~2000年昆明市整體植被覆蓋度呈下降趨勢,2000~2010年呈增長趨勢。分析認為,城市的髮展與擴建導緻植被覆蓋度減少;應註重城市綠化建設,新建公園與廣場,使城市植被得到恢複。
식피복개도시반영식피상황적중요인소,이1988、1996、2000、2006화2010년5개시상적TM화ETM+영상수거,이용상원이분법모형계산료곤명시식피복개도병분석기시공변화。결과표명,1988~2010년적22년간,곤명시적식피복개도변화명현,평균식피복개도종56.2%하강도50.7%,강폭체5.5%;특별시관도구화정공신구변화폭도최위현저,강폭분별위12.3%화6%。안시단분석결과,1988~2000년곤명시정체식피복개도정하강추세,2000~2010년정증장추세。분석인위,성시적발전여확건도치식피복개도감소;응주중성시녹화건설,신건공완여엄장,사성시식피득도회복。
Vegetation coverage is an important factor reflected vegetation condition .Vegetation coverage of Kunming was calculated based on RS images (TM images and ETM+) of 1988, 1996, 2000, 2006 and 2010 by using dimidiate pixel model.The results showed that vegetation coverage obviously changed during 1998-2010, the area of average vegetation coverage decreased from 56.2%to 50.7%and the re-duction was up to 5.5%;In particular, the vegetation fraction of Guandu district and Xishan district are obviously reduced by 12.3%and 6%.Results of the analysis by time period of 1988 to 2000, the vege-tation coverage showed downward trend , from 2000 to 2010, the vegetation coverage showed upward trend.The development and expansion of urban leaded to vegetation coverage reduction , so we should fo-cus on urban greening, new parks and squares built for the vegetation recover .