| 岩溶关键带植被对水循环过程的影响作用研究 |
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| 关键词:forest vegetation water cycle rocky desertification control the critical zone of karst area |
| 基金项目:广西重点研发计划(编号: 桂科AB110004; 桂科AB18126062);国家重点研发计划项目(编号: 2016YFC0502302; 2016YFC0502500);广西科技基地;人才专项项目(编号: 桂科AD17129052);国家自然科学基金项目(编号: 41502260; 41472239) |
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| 摘要: |
| The Effect of Vegetation on Groundwater Cycle in the Critical Zone of the Karst Area |
| With the adjustment of rural energy structure and the implementation of a few forest and grass vegetation protection policies, the trend of rocky desertification in southwest China has been initially contained. Karstification is a carbon cycle process that is driven by the water cycle. The hydrological effect of forest vegetation can not only promote the growth of vegetation itself but also further promote the karstification process. In this paper, two karst groundwater systems with different vegetation coverages in the karst critical zone of southwest China were chosen as study areas. The monitoring of indicators, including precipitation, groundwater discharge, hydrochemical components, and isotope composition, was conducted, and the effect of vegetation on groundwater cycle was discussed. The results indicate that forest can effectively enhance precipitation in the forest critical zone. Because vegetation can stimulate secondary precipitation by transpiration, the precipitation in the forest area is larger than that in other places obviously. Forest vegetation has obvious function of water interception and flood elimination. The max value of groundwater discharge in the forest cover area is more lagging behind and the rainfall-runoff curve is smoother than other regions with poor vegetation. In addition, forest vegetation contributes a lot to inorganic carbon in groundwater of karst critical zone and can effectively enhance karst process. |
| KANG Zhi-qiang,CHEN Jun,YUAN Dao-xian,HE Shi-yi,DENG Yan,CHEN Yang,LIU Yuan-yuan,JIANG Guang-hui,ZHANG Qin-jun.2021.The Effect of Vegetation on Groundwater Cycle in the Critical Zone of the Karst Area[J].Acta Geoscientica Sinica,42(3):391-396. |
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