Spatio-temporal changes and driving factors of environmental and ecological index in Culai-Lianhua area
Chao MA1,2, Panli CAI1,3
1. College of Surveying & Land Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China 2. Key Laboratory of State Bureau of Surveying and Mapping of Mine Spatial Information Technology, School of Surveying and Mapping Land Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China 3. College of Resources and Environment, University of Chinese Academy of Science, Beijing 100190, China
The strained human-land relationship in habitats which are isolated like islands inland, is an indicator sensitive to regional environmental changes as well as human activities. Based on image data obtained from Landsat MSS/TM/OLI (1982—2016), average annual precipitation and temperature data derived from meteorological stations (1982—2012), and DEM acquired by ASTER, the authors carried out time series analysis and correlation analysis of climate change factors (annual precipitation and temperature), human activity factors (area of cultivated and construction land) and specific remote sensing indexes including NDVI (normalized difference vegetation index) and NDBI (normalized difference building index) in Culai-Lianhua area. Some conclusions have been reached: The trend of vegetation degradation has been obvious in the past 35 years. It is clear that woodland and shrub have been transformed into grassland and sparse grassland, whereas grassland and sparse grassland have been transformed into bare land. The landscape pattern has changed. Woodland is surrounded by cultivated land and construction land. The woodland has been mixed with cultivated and construction land as well. The construction of the core area has made positive effect. In the core area, the growth rate of NDVI is 0.006 9/10 a and the NDBI has decreased at a rate of 0.014/10 a. On the contrary, around the core area, its NDVI has been speeding down at a rate of 0.018/10 a and the growth rate of NDBI is 0.003 5/10 a. The cultivated land has been greatly reduced, and mostly has been transformed into construction land and woodland. There exists a significant negative correlation between the change of woodland area and the change of cultivated and construction land area. In general, both the ecological structure and the landscape pattern have undergone adverse changes in Culai-Lianhua area.
Chao MA,Panli CAI. Spatio-temporal changes and driving factors of environmental and ecological index in Culai-Lianhua area[J]. Remote Sensing for Land & Resources,
2019, 31(4): 199-208.
Fig.1 The geographical location of the Culai-Lianhua area
平台传感器
成像时间
轨道号/ 帧号
平均云 量/%
是否参与 NDVI计算
Landsat3 MSS
1982-09-15
131/35
0.00
是
Landsat5 TM
1985-07-27
122/35
17.00
否
Landsat5 TM
1987-10-05
122/35
1.00
否
Landsat5 TM
1988-08-04
122/35
1.00
是
Landsat5 TM
1991-09-30
122/35
0.00
否
Landsat5 TM
1993-09-03
122/35
1.00
是
Landsat5 TM
1998-09-01
122/35
5.00
是
Landsat5 TM
2001-09-09
122/35
1.00
否
Landsat5 TM
2003-09-15
122/35
1.00
是
Landsat5 TM
2004-10-03
122/35
0.00
否
Landsat5 TM
2006-08-22
122/35
39.00
否
Landsat5 TM
2009-08-30
122/35
1.00
是
Landsat5 TM
2011-09-21
122/35
0.00
否
Landsat8 OLI
2013-09-26
122/35
0.45
否
Landsat8 OLI
2014-07-27
122/35
15.97
是
Landsat8 OLI
2016-09-02
122/35
1.08
是
Tab.1 List of remote sensing images (1982—2016)
Fig.2 The total area of the Culai-Lianhua basin
Fig.3 Time series NDVI density segmentation mapping
Fig.4 Time series of LUCC thematic mapping during 1982—2016
Fig.5 The trend of temperature and precipitation in the study area during 1982—2012
Fig.6 Trend of the LUCC in Culai-Lianhua basin during 1982—2016
Fig.7 GlobeLand30 products in Culai-Lianhua area in 2000 and 2010
Fig.8 Variation trend of NDBI in Culai-Lianhua basin during 1988—2016
Fig.9 Variation trend of NDVI in Culai-Lianhua basin during 1988—2016
Fig.10 North-south section of NDVI in Culai basin during 1988—2016
Fig.11 North-south section of NDVI in Lianhua basin during 1988—2016
Fig.12 The percentage of NDVI density division in Culai-Lianhua basin during 1988—2016
Fig.13 The correlation matrix between humanity and natural elements
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