Study on NPP dynamic change characteristics and driving factors response in mining area of Shanxi province:taking Xuangang mining area as an example

doi:10.13474/j.cnki.11-2246.2024.0713

Abstract

Abstract: Over the years, the development of Shanxi province has been mainly driven by coal resources, but the ecological environment has been destroyed. The net primary productivity of vegetation (NPP) is an important index to measure the regional ecological environment. The study of NPP of mining area vegetation is of great significance for regional ecological restoration, sustainable development and high-quality development. Taking Xuangang mining area in Shanxi province as an example, this study used Landsat, MOD17A3H, DEM, meteorological and population data, and integrated CASA model, monadic linear regression, Hurst index and geographical detector methods to reveal the spatio-temporal variation characteristics of NPP in the mining area, and analyzed its driving factors. The results show that: ①In terms of time scale, the NPP high value area of vegetation in Xuangang mining area shows a significant upward trend from 2000 to 2021, and the average annual value is 370.79 gC/(m²·a); ②In spatial scale, NPP of vegetation in the mining area has significant heterogeneity, showing a gradual decrease from southwest to northeast, with the median area (53.63%)、high value area (41.99%)、low value area (4.38%),from the largest to the smallest; ③In terms of changing trend, NPP of vegetation in mining area is mainly increasing, and will continue to intensify in the future, and the vegetation growth environment still faces great challenges; ④From the perspective of driving factors, the NPP of vegetation in mining area is affected by land use (0.109)、elevation (0.088)、population density (0.075)、slope (0.042)、precipitation (0.020)、air temperature (0.014)、slope direction (0.042),from the largest to the smallest.

Key words: net primary productivity of vegetation, dynamic change, driving factors, mining district

CLC Number:

P237

WANG Wenwen, LI Jiafang, YANG Wenfu. Study on NPP dynamic change characteristics and driving factors response in mining area of Shanxi province:taking Xuangang mining area as an example[J]. Bulletin of Surveying and Mapping, 2024, 0(7): 71-76,163.

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