Full
Outline
Over-exploitation of mineral resources aggravates the ecological environmental pressure in mining areas. As solid wastes containing potential heavy metals, tailings cause damage to soil organic matter (SOM) through stockpiling, which has become a key issue in ecological restoration. The SOM monitoring system of tailings was established based on hyperspectral remote sensing technology. Taking a mining area in Tangshan, Hebei Province as the research object, vegetation canopy hyperspectral data were obtained using an ASD ground spectrometer and GF-5 satellite, and tailings samples at the corresponding points were collected for physicochemical property analysis. After screening sensitive bands with the Boruta algorithm, four types of models such as multiple stepwise linear regression (SMLR), partial least squares regression (PLSR), random forest (RF) and extreme gradient boosting (XGBoost) were constructed and verified for accuracy. The results show that the XGBoost model has the best prediction effect on the ground ASD spectral data (R2=0.92, RMSE=0.37), which is suitable for fine monitoring. The GF-5 satellite data perform best with the XGBoost model (R2=0.73, RMSE=0.53), which meets the needs of large-scale rapid assessment. The study confirms that ground-space multi-scale SOM monitoring can be realized through the collaborative optimization of spectral mathematical transformations and linear and nonlinear models, with efficiency significantly enhanced compared with traditional detection methods. The research results can provide a scientific basis for ecological restoration of mining areas, promoting environmental management of mining area and the sustainable development of mining industry.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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