Remote sensing assessment of ecological environment quality in karst trough basin

doi:10.6046/gtzyyg.2020.03.23

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Abstract

The ecological environment changes are related to social development. This paper analyzes the dynamic changes of the ecological environment quality of the Liuchi River Basin in Guizhou, in the hope of providing some reference that can promote the ecological civilization construction and environmental restoration of the watershed in the karst trough. The authors used remote sensing images which were from June to August, 2000, 2010 and 2017 Landsat satellites and GDEMDEM (30 m) data to extract vegetation cover, soil index, slope index, humidity and temperature index which served as the basis for constructing an ecological environment assessment model. In addition, spatial auto-correlation method was adopted to reveal the ecological environment that had different spatial and temporal characteristics in township scale. Some conclusions have been reached: ① From 2000 to 2017, the ecological environment quality showed a rapid restoration trend in the Liuchi River basin, but it varied differently in different counties. ② The quality of ecological environment showed significant differences in different towns. Meanwhile, the ecological improvement was slower in the county town and downstream towns, and was improved obviously in some towns of the central and southern area. ③ The ecological environment quality of towns had significant positive spatial agglomeration characteristics, and were dominated by high-high and low-low concentration in most years. In the trend analysis of towns’ ecological environment quality, the southeast basin was always the low-value zone, and the high-value zone is mainly distributed in the northern townships.

Keywords ecological environment quality remote sensing assessment spatial auto-correlation karst trough basin

TP75

Corresponding Authors: LI Xudong E-mail: gzyingkui@126.com;616507732@qq.com

Issue Date: 09 October 2020

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	Kui YING
	Xudong LI
	Dongya CHENG

Cite this article:

Kui YING,Xudong LI,Dongya CHENG. Remote sensing assessment of ecological environment quality in karst trough basin[J]. Remote Sensing for Land & Resources, 2020, 32(3): 173-182.

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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2020.03.23 OR https://www.gtzyyg.com/EN/Y2020/V32/I3/173

Fig.1 Landform and administrative division of the Liuchi River basin

Fig.2 Technical flow chart of this paper

Tab.1 Classification criteria for eco-environmental evaluation indicators

Fig.3 Comprehensive evaluation of the ecological environment in Liuchi River basin from 2000 to 2017

Fig.4 Diagram of ecological environment changes in the Liuchi River basin

Tab.2 Measurement of ecological environment level changes in Liuchi River basin

Tab.3 Statistical table of ecological environment quality of counties from 2000 to 2017(%)

Fig.5 Comprehensive evaluation of town’s ecological environment in Liuchi River basin from 2000 to 2017

Fig.6 Moran’I scatter plot of eco-environmental quality in Liuchi River basin from 2000 to 2017

Fig.7 Eco-environmental quality LISA diagram in Liuchi River basin from 2000 to 2017

Fig.8 Spatial trend analysis of township ecological environment quality

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