Study on the Response of Vegetation Cover Change and Climate Change in Wujiang River Basin Based on MODIS Data

doi:10.13466/j.cnki.lyzygl.2017.01.021

Abstract

Abstract:

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 vegetation change and provide reference for ecological protection of Wujiang River Basin.Based on the data of MOD13Q1,MODIS11 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 and multiple 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 River 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 precipitation 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 decrease 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 reduction.The increase of vegetation coverage in the study area was mainly concentrated in the urban suburb,which is dominated by coniferous forest and cultivated land.It is the result of human being and climate interaction.The percentage of precipitation driven vegetative coverage is 27.75% in Wujiang River basin,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 mainly concentrated in the urban suburb,which is dominated by coniferous forest and cultivated land.It is the result of human being and climate interaction.

Key words: Wujiang River basin, NDVI change, response of climate, precipitation driven, non-temperature and precipitation driven

CLC Number:

S718.45

SHI Yueyue, YIN Zhengtong, ZHENG Wenfeng. Study on the Response of Vegetation Cover Change and Climate Change in Wujiang River Basin Based on MODIS Data[J]. FOREST RESOURCES WANAGEMENT, 2017, 0(1): 127-134.

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植被覆盖	气温/℃	降水/mm
常绿针叶林	-0.559^*	0.568^*
常绿阔叶林	-0.309	0.466
灌丛	-0.401	0.464
草地	-0.435	0.550^*
耕地	-0.568^*	0.601^*
年NDVI	-0.509	0.550^*

植被类型	气温/℃	降水/mm
常绿针叶林	-0.243	0.271
常绿阔叶林	-0.069	0.372
灌丛	-0.091	0.269
草地	-0.039	0.376
耕地	-0.222	0.321
年NDVI	-0.174	0.295

植被类型	复相关系数	植被类型	复相关系数
常绿针叶林	0.602	草地	0.551
常绿阔叶林	0.470	耕地	0.627
灌丛	0.470	年均NDVI	0.569