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Revealing the characteristics of basin runoff evolution and quantitatively identifying the contribution of driving factors is essential for adaptive water resources management and water security in basins. Based on the measured monthly runoff series from 1960-2015 at the NO.2 hydrological station in the source area of the Ulungur River and the meteorological and human water and soil resources development and utilization image data for the same period, the sliding removal wavelet analysis method, the Mann-Kendall trend test method and the sliding t test method were used to analyze the evolution trend and mutation characteristics of the hydrometeorological elements sequence. The elastic coefficient method based on the Budyko hypothesis was used to identify the contribution rates of climate changes and human activities to runoff change in the study area. The results show that there is a non-significant upward trend in runoff series, a significant upward trend in precipitation series and a significant downward trend in potential evapotranspiration series in the Ulungur River source area; The runoff series changed abruptly in 1995, with the sensitivity coefficients of runoff to precipitation, potential evapotranspiration and subsurface characteristics increasing by 8.8%, 25.0% and 7.8% respectively in the change period 1995-2015 compared to the base period 1960-1994; The contribution of changes in precipitation and potential evapotranspiration and subsurface characteristics parameters to runoff changes are 39.2%, 7.0% and 53.8% respectively. The runoff changes in the study area are driven by a combination of human activities and climatic elements, with human activities being the main driving factors.
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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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