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Landscape pattern and ecological risk analysis of poor rural areas in karst regions
In order to demonstrate the distinctions of rural landscape and ecological risks in different karst land forms, an analysis of the landscape pattern was conducted using ArcGIS 10.1 and Fragstats 4.2 software. In addition, landscape ecological risk was assessed quantitatively using data collected from Shimen Town(mid-mountain karst), Zongdi Town(peak-cluster depression), Zhouqin Town(low hills), and Zhangbu Town(peak-cluster canyon). We found that the proportion of patch area(PLAND), number of patches(NP), patches density (PD), and landscape shape index(LSI) varied among towns. The landscape index characteristics of Zhangbu Town in a peak-cluster canyon contrasted with those of Shimen Town in a mid-mountain karst, while the landscape index characteristics of Zongdi Town in a peakcluster depression and of Zhouqin Town in low hills were intermediate between those of Zhangbu and Shimen Town. The landscape ecological risk for Zhouqin Town in low hills and for Zhangbu Town in a peak-cluster canyon was lower than that for Shimen Town in a mid-mountain region and for Zongdi Town in a peak-cluster depression. The landscape ecological risk for the north of Shimen Town was higher than that for the east and southwest regions because the northern region was dominated by undeveloped land and construction land, whereas the eastern and southwestern regions were dominated by brush/grass land, and woodland. In the center of Zongdi Town, undeveloped land resulted in increased landscape ecological risk, whereas brush/grass land with a large proportion in the east and west reduced the landscape ecological risk. The concentration of contiguous distribution of farmland, woodland, and brush/grass land in most parts of Zhouqin Town seemed to mitigate the landscape ecological risk, which were in lower landscape ecological risk with the western region as an exception. The landscape ecological risk posed to the middle and north of Zhangbu Town was significantly lower than in the south owing to the centration of woodland in central and northern areas as well as the mosaic distribution of each type of land use in the south. The study provide a scientific basis for land use control and ecological risk management for rural karst areas.
Landscape pattern and ecological risk analysis of poor rural areas in karst regions
In order to demonstrate the distinctions of rural landscape and ecological risks in different karst land forms, an analysis of the landscape pattern was conducted using ArcGIS 10.1 and Fragstats 4.2 software. In addition, landscape ecological risk was assessed quantitatively using data collected from Shimen Town(mid-mountain karst), Zongdi Town(peak-cluster depression), Zhouqin Town(low hills), and Zhangbu Town(peak-cluster canyon). We found that the proportion of patch area(PLAND), number of patches(NP), patches density (PD), and landscape shape index(LSI) varied among towns. The landscape index characteristics of Zhangbu Town in a peak-cluster canyon contrasted with those of Shimen Town in a mid-mountain karst, while the landscape index characteristics of Zongdi Town in a peakcluster depression and of Zhouqin Town in low hills were intermediate between those of Zhangbu and Shimen Town. The landscape ecological risk for Zhouqin Town in low hills and for Zhangbu Town in a peak-cluster canyon was lower than that for Shimen Town in a mid-mountain region and for Zongdi Town in a peak-cluster depression. The landscape ecological risk for the north of Shimen Town was higher than that for the east and southwest regions because the northern region was dominated by undeveloped land and construction land, whereas the eastern and southwestern regions were dominated by brush/grass land, and woodland. In the center of Zongdi Town, undeveloped land resulted in increased landscape ecological risk, whereas brush/grass land with a large proportion in the east and west reduced the landscape ecological risk. The concentration of contiguous distribution of farmland, woodland, and brush/grass land in most parts of Zhouqin Town seemed to mitigate the landscape ecological risk, which were in lower landscape ecological risk with the western region as an exception. The landscape ecological risk posed to the middle and north of Zhangbu Town was significantly lower than in the south owing to the centration of woodland in central and northern areas as well as the mosaic distribution of each type of land use in the south. The study provide a scientific basis for land use control and ecological risk management for rural karst areas.
Landscape pattern and ecological risk analysis of poor rural areas in karst regions
HAN Hui-qing (author) / LI Jin-yan (author) / CHEN Si-ying (author) / MA Shu-liang (author) / ZHANG Xin-ding (author) / REN Yue-qian (author)
2020
Article (Journal)
Electronic Resource
Unknown
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