摘要
分析乌江流域2001-2015年每年8月植被变化规律与气候间关系,得出植被覆盖时间和空间变化规律,为乌江流域生态保护提供参考依据,基于MOD13Q1,MODIS11 C3,TRMM3B43遥感数据产品,使用趋势分析法分析15年内NDVI变化趋势,简单相关分析、偏相关分析和复相关分析得出NDVI变化与气候变化关系,结果如下:15年中乌江流域NDVI整体呈上升趋势;NDVI变化与气温呈负相关,NDVI变化与降水呈正相关,降水对NDVI的促进作用高于气温的抑制作用;气温、降水对耕地影响最大,常绿针叶林次之;高程在1 000~2 000m的植被覆盖变化最大;沿江地带植被覆盖减少与乌江流域梯级开发有关;植被覆盖减少多在城市区。乌江流域降水驱动型植被占研究区27.75%,对气候响应较大的植被类型以耕地为主;非气温降水驱动型比例为72.25%,人类活动对乌江流域植被覆盖变化起主导作用。
The relationship among NDVI,Temperature and precipitation changes in Augusts in Wujiang River basin between 2001 and 2015 was analyzed to get the temporal and spatial variation laws of vegeta-tion change and provide reference for ecological protection of Wujiang River Basin. Based on the data of M0D13Q1,MODISll C3 and TRMM3B43,the trend analysis method was used to analyze the change trend situation of NDVI in 15 years. After that,simple correlation analysis,partial correlation analysis andmultiple correlation analysis were used respectively to analyze the response of NDVI change with climate change. The results are as follows ： the vegetation cover change is an overall upward trend in Wujiang Riv-er basin in 15 years. The relationship between vegetation cover change and the temperature is a negative correlation. The influence of rainfall on NDVI is greater than the temperature ;The temperature and precip-itation effects on cultivated land is the largest and on the evergreen coniferous forest is second. Elevation of vegetation cover change at the 1 000 - 2000m was the largest in the evergreen coniferous forest. The de-crease of vegetation cover along the Wujiang River is related to the cascade development of Wujiang River Basin, NDVI changes in the area of the hydropower station were shown as the core outward radiation re-duction. The increase of vegetation coverage in the study area was mainly concentrated in the urban sub-urb ,which is dominated by coniferous forest and cultivated lan d . It is the result of human being and cli- mate interaction. The percentage of precipitation driven vegetative coverage is 27. 75% in Wujiang River bas in, the climate response larger than vegetation type is given priority to cultivated land; The percentage of the non-temperature and precipitation driven vegetative coverage is 72. 25% in Wujiang River basin and human activities on the wujiang river basin vegetation cover change plays a leading role. The increase of vegetation coverage in the study area is
出处
《林业资源管理》
北大核心
2017年第1期127-134,共8页
Forest Resources Management
基金
中国博士后科学基金(2016M592647)
国家自然科学基金"基于立体视觉的动态在体软组织表面三维运动跟踪研究"(61305022)
虚拟现实技术与系统国家重点实验室(BUAA-VR-16KF-11)
关键词
乌江流域
NDVI变化
气候响应
降水驱动型
非气温降水驱动型
Wujiang River basin, NDYI change, response of climate, precipitation driven, non-temperature and precipitation driven
