Dynamic Monitoring and Spatio-temporal Pattern of Ecological Environmental Quality in Nanning City Based on Google Earth Engine
Journal Title: Bulletin of Soil and Water Conservation - Year 2023, Vol 43, Issue 5
Abstract
[Objective] Remote sensing technology is used to monitor and evaluate the change of urban ecological environment quality timely, dynamically and objectively, in order to provide reference for urban ecological environment planning and management. [Methods] Landsat TM/ETM+/OLS historical images of the same season from 2000 to 2020 were collected. The Google Earth Engine (GEE) platform was used to perform pixel-level cloud removal and chromatic aberration correction. The median value composite was used to calculate four remote sensing indicators including greenness, wetness, dryness, and heat. The remote sensing ecological index (RSEI) was constructed by principal component analysis (PCA) to evaluate the dynamic changes and spatial differentiation characteristics of urban ecological environmental quality in Nanning City with the help of the parallel cloud computing ability in GEE. [Results] The average value of RSEI was 0.615 in Nanning City, and its ecological environmental quality was observed to follow an overall fluctuating upward trend of “decreasing-increasing-stable”. The spatial heterogeneity of ecological environmental quality in Nanning City was obvious. The areas with better ecological environmental quality were mainly concentrated in the nature reserves, forest lands, grasslands and water areas, while the degraded areas of ecological environmental quality were mainly located in the cities, urban-rural transition zones and farming areas with frequent human activities and greater land use intensity. RSEI was positively correlated with greenness and wetness indicators, and negatively correlated with dryness and heat, and dryness index factor had the greatest influence on RSEI. [Conclusion] The ecological environmental quality of Nanning City was well characterized by RSEI, and the overall ecological environmental quality was at a good level from 2000 to 2020. The combination of GEE and RSEI could effectively improve the use of remote sensing images, and therefore could be used for long-term monitoring and assessing of ecological environmental quality in the urban region.
Authors and Affiliations
Qiuhua Liu, Yuchu Xie, Yutian Qin, Yu Zhang, Kunshi Yang
Keywords
Related Articles
- EP ID EP762695
- DOI 10.13961/j.cnki.stbctb.2023.05.015
- Views 9
- Downloads 0
Shear Characteristics of Root-Soil Interface of Caragana Korshinskii in Loess Area of Northeastern Qinghai-Tibet Plateau
[Objective] The effects of different factors on the shear strength index and shear strength of the root-soil interface were analyzed, in order to provide an understanding of the mechanism of shrub root soil fixation and...
Research Progress and Prospect Slope Greening in China
[Objective] The current status and hot trends of slope greening research were studied in order to provide theoretical support and references for subsequent research. [Methods] Professional bibliometric tools CiteSpace an...
Dynamic Monitoring of Grain for Green Program at Chaoyang City, Liaoning Province Based on Landsat Images During 1985—2020
[Objective] The land cover during the grain for green project (GGP) at Chaoyang City, Liaoning Province were analyzed, and the trend of inter annual land class changes were tracked and monitored, and the impact of the pr...
Dynamic Monitoring and Spatio-temporal Pattern of Ecological Environmental Quality in Nanning City Based on Google Earth Engine
[Objective] Remote sensing technology is used to monitor and evaluate the change of urban ecological environment quality timely, dynamically and objectively, in order to provide reference for urban ecological environment...
Effects of Different Mulching Measures on Distribution of Organic Carbon and Inorganic Carbon in Soil Aggregates Under Spring Maize Cultivation
[Objective] The effects of different mulching methods on the distribution of organic and inorganic carbon in soil aggregates on the Loess Plateau, and the mechanism under which soil aggregates sequester carbon under mulc...