Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 41472228 |
| 鄂尔多斯高原植被盖度变化对地下水补给的影响 | |
| 尹立河 | |
| 主持机构 | 中国地质调查局西安地质调查中心 |
| 开始日期 | 2015 |
| 结束日期 | 2018 |
| 资助经费 | 920000(CNY) |
| 项目类别 | 面上项目 |
| 资助机构 | CN-NSFC（国家自然科学基金） |
| 语种 | 中文 |
| 国家 | 中国 |
| 英文简介 | With the implementation of the ecological restoration project in arid zones, the ecological environment improves continually. However, the increase of vegetation coverage may reduce groundwater recharge and consequently the conflict between groundwater supply and demand will be more severe. Therefore, the impact of vegetation coverage on groundwater recharge should be quantified. Firstly, the difference is compared in terms of soil water and groundwater recharge in the vegetated and non-vegetated lysimeters and the impact is revealed. The relation between groundwater and vegetation is further studies using the variable saturated simulations. Then the Hailiutu River Catchment in the Ordos Plateau is selected as the study area, and the vegetation coverage is determined using the combination of remote sensing and the in-situ measurement. The time series analysis and depth-varied specific yield are introduced to modify the water-table fluctuation method and the impact of water-table depth on recharge is removed using the soli water numerical modeling. Based on the above studies, the relation between vegetation coverage and groundwater recharge is developed quantitatively using the precipitation infiltration coefficient as the comparison index.With the implementation of the ecological restoration project in arid zones, the ecological environment improves continually. However, the increase of vegetation coverage may reduce groundwater recharge and consequently the conflict between groundwater supply and demand will be more severe. Therefore, the impact of vegetation coverage on groundwater recharge should be quantified. Firstly, the difference is compared in terms of soil water and groundwater recharge in the vegetated and non-vegetated lysimeters and the impact is revealed. The relation between groundwater and vegetation is further studies using the variable saturated simulations. Then the Hailiutu River Catchment in the Ordos Plateau is selected as the study area, and the vegetation coverage is determined using the combination of remote sensing and the in-situ measurement. The time series analysis and depth-varied specific yield are introduced to modify the water-table fluctuation method and the impact of water-table depth on recharge is removed using the soli water numerical modeling. Based on the above studies, the statistic relation between vegetation coverage and groundwater recharge is developed quantitatively using the precipitation infiltration coefficient as the comparison index. This study will reveal the pattern of groundwater recharge and vegetation coverage variation and explore the mechanism of the response of groundwater recharge to vegetation coverage and provides the scientific bases for the harmonic development of groundwater and ecology and for the full understanding of the feedback between them in arid regions. |
| 来源机构 | 中国地质调查局西安地质调查中心 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/345794 |
| 推荐引用方式 GB/T 7714 | 尹立河.鄂尔多斯高原植被盖度变化对地下水补给的影响.2015. |
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