A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effects of Human Activities on Terrestrial Vegetation Coverage Change of Poyang Lake Basin During 2000—2020
[Objective] The mechanism on how human activities affect vegetation dynamics was studied in order to promote the healthy development of terrestrial ecosystems. [Methods] Based on the latest MODIS enhanced vegetation index (EVI) products, meteorological data, land use data, and population data for the Poyang Lake basin, we analyzed how human activities drove changes in vegetation coverage during 2000—2020 by using the methods of trend analysis, residual analysis, and correlation analysis. [Results] The surface vegetation of the Poyang Lake basin increased remarkably in the past 20 years, and EVI showed a significant increasing trend (p<0.05). Human activities in the basin generally played an important role in increasing EVI, but also showed an obvious inhibitory effect on EVI in areas where urbanization had expanded. At the basin scale, the contribution rate of human activities to EVI growth was 32.48%, and the average contribution rate of human activities among different sub-basins was 30%~43%. EVI and its residual trend reached peak values when the population density in the Poyang Lake basin increased by 0~100 people/km2 and 400~500 people/km2, respectively. This was mainly driven by rapid social and economic development and the concept of ecological civilization construction in Jiangxi Province in recent years. A small increase in population density (0~100 people/km2) in the vast rural areas could effectively improve the surface vegetation status more than in the pure population loss areas. At the same time, a population density increase in urban areas within in a certain range (400~500 people/km2) could also increase surface vegetation. [Conclusion] Human activities are an important factor for changing surface vegetation coverage. The concepts of “green” and “coordination” in high-quality development are very important for improving the ecological environment.
Effects of Human Activities on Terrestrial Vegetation Coverage Change of Poyang Lake Basin During 2000—2020
[Objective] The mechanism on how human activities affect vegetation dynamics was studied in order to promote the healthy development of terrestrial ecosystems. [Methods] Based on the latest MODIS enhanced vegetation index (EVI) products, meteorological data, land use data, and population data for the Poyang Lake basin, we analyzed how human activities drove changes in vegetation coverage during 2000—2020 by using the methods of trend analysis, residual analysis, and correlation analysis. [Results] The surface vegetation of the Poyang Lake basin increased remarkably in the past 20 years, and EVI showed a significant increasing trend (p<0.05). Human activities in the basin generally played an important role in increasing EVI, but also showed an obvious inhibitory effect on EVI in areas where urbanization had expanded. At the basin scale, the contribution rate of human activities to EVI growth was 32.48%, and the average contribution rate of human activities among different sub-basins was 30%~43%. EVI and its residual trend reached peak values when the population density in the Poyang Lake basin increased by 0~100 people/km2 and 400~500 people/km2, respectively. This was mainly driven by rapid social and economic development and the concept of ecological civilization construction in Jiangxi Province in recent years. A small increase in population density (0~100 people/km2) in the vast rural areas could effectively improve the surface vegetation status more than in the pure population loss areas. At the same time, a population density increase in urban areas within in a certain range (400~500 people/km2) could also increase surface vegetation. [Conclusion] Human activities are an important factor for changing surface vegetation coverage. The concepts of “green” and “coordination” in high-quality development are very important for improving the ecological environment.
Effects of Human Activities on Terrestrial Vegetation Coverage Change of Poyang Lake Basin During 2000—2020
Liu Tingting (author) / Yang Xiaoxia (author) / Ye Xuchun (author) / Wu Juan (author) / Liu Jia (author)
2022
Article (Journal)
Electronic Resource
Unknown
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