[1]LI Yingxin,LI Shihua,PENG Shuangyun.Temporal and Spatial Evolution of NDVI and Its Response Relation with the Climate in the Nine Plateau Lake Basins of Yunnan Province[J].Research of Soil and Water Conservation,2020,27(04):192-200.
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Temporal and Spatial Evolution of NDVI and Its Response Relation with the Climate in the Nine Plateau Lake Basins of Yunnan Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 04
Page number:
192-200
Column:
目次
Public date:
2020-06-20
- Title:
- Temporal and Spatial Evolution of NDVI and Its Response Relation with the Climate in the Nine Plateau Lake Basins of Yunnan Province
- CLC:
- Q948
- DOI:
- -
- Abstract:
- Exploring the spatiotemporal evolution of NDVI and its response to climate in the nine plateau lake basins in Yunnan Province is of great significance to the ecological environment protection and ecological security construction. Based on the Landsat data of 2000, 2005, 2010 and 2015 and the meteorological data in the same period, the spatiotemporal evolution of NDVI in nine plateau lake basins in Yunnan Province in recent 16 years and its response to climate factors were studied by using methods such as trend analysis, partial correlation analysis and change trajectory. The results show that:(1)in the past 16 years, the NDVI of the nine plateau lake basins has generally increased at a rate of 0.026/decade, but there are significant differences in NDVI changes among the basins; the Xingyun Lake and Qilu Lake basins have a large area of vegetation degradation, while Fuxian Lake basin has obvious effects of vegetation restoration;(2)except Chenghai basin, NDVI changes in nine plateau lake basins have certain correlation with climatic factors, but the correlation is not significant, and the spatial heterogeneity in different regions is obvious; the correlation between temperature and NDVI values in the basins in western and northwest Yunnan is greater than that between precipitation and NDVI values; the correlation between precipitation and NDVI values in the basins of central Yunnan is greater than that between temperature and NDVI values; the correlation between NDVI values and temperature and precipitation in the basins of southern Yunnan is not significant; NDVI values in Chenghai basin which is located in Jinsha River valley is negatively correlated with temperature and precipitation;(3)NDVI changes are significantly correlated with elevation differentiation, and the vertical distribution of vegetation is obvious; in the elevation band of 1 000～3 000 m, NDVI values increase with the increase of elevation, and 3 000 m is the turning point of NDVI values in nine plateau lake basins;(4)the transformation from non-vegetation type to vegetation type is the main form of NDVI spatiotemporal transformation in the nine plateau lake basins, while the transformation from bare soil to water area or building area in Dianchi lake basin is relatively significant.
- References:
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Last Update:
2020-07-09