| 云南石林喀斯特露石径流输出及其影响因素探究 |
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| 关键词:karst rock outcrop runoff canopy coverage redistribution influencing factors |
| 基金项目:国家自然科学基金(编号: 41671031);中科院“135项目”(编号: 2017XTBG-F01);国家重点研发计划(编号: 2016YFC0502503) |
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| A Study of Runoff of Karst Rock Outcrops and Its Influencing Factors in Shilin, Yunnan Province |
| Karst rock outcrops (ROCs) have important ecological functions; however, few studies have focused on the factors that affect the ROCs runoff output. In this study, ROCs receiving area, roughness and ROCs runoff were measured in three typical karst ecosystems, i.e. rocky desertification, forest plantation, and primary forest ecosystem in Shilin country, Yunnan Province. The results are as follows: (1) There is a highly significant correlation between rainfall received by ROCs and ROCs runoff volume within the rainfall range from 3.92 mm to 72.31 mm. (2) Rainfall, canopy coverage and ROCs roughness affect ROCs runoff output. There is a significant positive correlation between rainfall and ROCs runoff depth. Rainfall received by ROCs and ROCs runoff output in rocky desertification ecosystem are significantly higher than those in other two forest ecosystems. ROCs runoff decreases with the increase of ROCs roughness, and there is a significant negative correlation between them. (3) The conversion coefficient of rainfall to ROCs runoff in rocky desertification ecosystem is 0.483, which is higher than that in plantation and primary forest ecosystems (0.434 and 0.413), but the significant difference in conversion coefficient of rainfall to ROCs runoff in forest plantation ecosystem is only significantly higher than that in primary forest ecosystem when the rainfall is in light degree. Under the influence of multiple factors, karst rock outcrop runoff is highly heterogeneous, which provides strong evidence for the formation of soil moisture heterogeneity, nutrient heterogeneity, and biodiversity in the karst area. |
| WANG Qing-he,ZHAO Zhi-meng,SHEN You-xin.2021.A Study of Runoff of Karst Rock Outcrops and Its Influencing Factors in Shilin, Yunnan Province[J].Acta Geoscientica Sinica,42(3):383-390. |
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