[1]MIAO Xu,LI Jiuyi,SONG Xiaoyan,et al.Analysis on Change Pattern and Attribution of Vegetation NDVI in Ordos City from 2000 to 2020[J].Research of Soil and Water Conservation,2022,29(03):300-307.
Copy
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 03
Page number:
300-307
Column:
Public date:
2022-04-20
- Title:
-
Analysis on Change Pattern and Attribution of Vegetation NDVI in Ordos City from 2000 to 2020
- Author(s):
-
MIAO Xu1, LI Jiuyi2, SONG Xiaoyan1, CHENG Duliang1, LIU Yumei3
-
(1.Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China; 3.School of Geography Science and Geomatics Engineering, SUST, Suzhou,Jiangsu 215009, China)
-
- Keywords:
-
vegetation NDVI; climate; human activities; Ordos City
- CLC:
-
Q948.1
- DOI:
-
-
- Abstract:
-
The ecological system of Ordos City, located in agro-pastoral ecotone, is more sensitive. In order to explore the impact of global climate changes and the human activities on the ecosystem of Ordos City, we used MOD13Q1 NDVI, meteorological data, the partial correlation analysis and residual driving force analysis methods to analyze the change characteristics and driving force for vegetation NDVI of Ordos City from 2000 to 2020. The results show that:(1)the vegetation NDVI of Ordos City had shown an overall upward trend in the past 21 years, and the vegetation had improved significantly; the vegetation NDVI of 68.66% of the city had been improved, and the improvement rate of vegetation in the southwest was smaller than that in the northeast;(2)there were obvious regional differences in the partial correlation between vegetation NDVI and climatic factors in Ordos City; the partial correlation between vegetation NDVI and precipitation was relatively high, and the area affected by precipitation and temperature together accounted for about 2.27% of the total area;(3)the vegetation of Ordos City was affected by both human activities and climate change; in the past 21 years, human activities played a leading role in the change of vegetation NDVI in Ordos City with an average contribution rate of 82.67%; the main influence of climate change on the growth of vegetation NDVI was the precipitation; the impact of humans on the vegetation of Ordos City had two sides; urban construction restrict the growth of vegetation, and the implementation of ecological projects was conducive to the growth of vegetation;(4)from 2000 to 2020, the increase of vegetation coverage represented by NDVI in Ordos City was inseparable from human activities, but at the same time, the climatic conditions in the Ordos region had a great restrictive effect on the growth of vegetation; when implementing ecological projects, we must pay attention to the impact of climate change, and must not blindly expand ecological projects; the vegetation in areas such as the Mu Us desert needs to be artificially protected to form a stable ecosystem.