Spatiotemporal evolution and attribution of vegetation coverage in the peak-cluster depression basins [峰丛洼地流域植被覆盖度时空演变及其归因]

作者：Wang D.-H.; Tian Y.-C.^*; Zhang Y.-L.; Huang L.-L.; Zhang Q.; Tao J.; Yang Y.-W.; Lin J.-L.

来源：China Environmental Science, 2022, 42(9): 4274-4284.

• Geodetector
• Hurst index
• spatial distribution
• the peak-cluster depression basins in Southwest Guangxi
• Theil Sen trend
• vegetation coverage

In this paper, the pixel dichotomy model, coupled with the Theil-Sen Median trend, Mann-Kendall test and Hurst index, is used to characterize the vegetation coverage in the peak-cluster depression basins in Southwest Guangxi from 2000 to 2020, and finally the Geodetector is applied to quantify the driving factors. The results show that: (1) Interannual variations in vegetation cover in the basin demonstrate an increasing trend over the 21-year period, with an overall growth rate of 0.6754a-1(0.774a-1 in karst areas and 0.5751a-1 in non-karst areas); (2) There is a pattern of "high in the north and low in the east", in which 82.68% of the study area have a significant increase and only 0.61% show a significant decrease; (3) The Hurst index of regional vegetation coverage trends to be between 0~1, with an average value of 0.8207, showing a single peak deviation to the right and a trend of continuous improvement in the future; (4) In terms of driving mechanism, land use/cover (LULC) is the dominant factor of vegetation coverage in the whole study area; all drivers showed significant interactions on the spatial distribution of vegetation coverage, among which the interaction between LULC and population density (pop) was the strongest.

• 单位
  北部湾大学; 桂林理工大学