人民黄河
人民黃河
인민황하
Yellow River
2015年
1期
94-98
,共5页
植被%MODIS%降水量%地形地貌%柴达木盆地
植被%MODIS%降水量%地形地貌%柴達木盆地
식피%MODIS%강수량%지형지모%시체목분지
vegetation%MODIS%precipitation%topography%Qaidam Basin
植被是陆地生态系统的主体，是自然生态系统中最活跃和敏感的因子，能够反映出气候、水、土壤等的变化。柴达木盆地地处干旱区，生态环境脆弱，采用MODIS遥感数据分析柴达木盆地植被类型、植被覆盖度的时空演化特征，结果表明：柴达木盆地总体植被覆盖较差，植被覆盖度较低，裸地或极稀疏植被占较大面积，2001—2012年裸地或极稀疏植被面积持续减小。植被指数一元线性回归分析结果表明盆地大部分区域植被呈明显好转趋势，这与近年来盆地内降水量增大密不可分。此外，地形地貌也是影响植被空间分布的重要因素。
植被是陸地生態繫統的主體，是自然生態繫統中最活躍和敏感的因子，能夠反映齣氣候、水、土壤等的變化。柴達木盆地地處榦旱區，生態環境脆弱，採用MODIS遙感數據分析柴達木盆地植被類型、植被覆蓋度的時空縯化特徵，結果錶明：柴達木盆地總體植被覆蓋較差，植被覆蓋度較低，裸地或極稀疏植被佔較大麵積，2001—2012年裸地或極稀疏植被麵積持續減小。植被指數一元線性迴歸分析結果錶明盆地大部分區域植被呈明顯好轉趨勢，這與近年來盆地內降水量增大密不可分。此外，地形地貌也是影響植被空間分佈的重要因素。
식피시륙지생태계통적주체，시자연생태계통중최활약화민감적인자，능구반영출기후、수、토양등적변화。시체목분지지처간한구，생태배경취약，채용MODIS요감수거분석시체목분지식피류형、식피복개도적시공연화특정，결과표명：시체목분지총체식피복개교차，식피복개도교저，라지혹겁희소식피점교대면적，2001—2012년라지혹겁희소식피면적지속감소。식피지수일원선성회귀분석결과표명분지대부분구역식피정명현호전추세，저여근년래분지내강수량증대밀불가분。차외，지형지모야시영향식피공간분포적중요인소。
Vegetation is the main body of the terrestrial ecosystem,and it is the most active and sensitive factor in the natural ecological sys-tem,which can reflect the change of climate,water,soil and others. Qaidam Basin is located in arid area,and the ecological environment is fragile. So based on MODIS data,the characteristics of vegetation distribution and vegetation evolutionary trend in Qaidam Basin were ana-lyzed. The results show that the vegetation coverage is low,and the area of barren or sparsely vegetated is large. From 2001 to 2012,the ar-ea of barren or sparsely vegetated decreases continuously. The linear regression analysis of NDVI shows that vegetation improves in most of the basin. Vegetation improvement is inseparable with the increscent of precipitation. In addition,the topography is an important factor which influences the spatial distribution of vegetation.
