| 西辽河平原地下水补给植被的临界埋深 |
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| 引用本文： | 陈敏建,张秋霞,汪勇,闫龙,邓伟.西辽河平原地下水补给植被的临界埋深[J].水科学进展,2019,30(1):24-33. |
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| 作者姓名： | 陈敏建 张秋霞 汪勇 闫龙 邓伟 |
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| 作者单位： | 1.中国水利水电科学研究院, 北京 100038; |
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| 基金项目： | 水利部公益性行业科研专项经费资助项目（201501031）；水利部水利技术示范项目（SF-201702） |
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| 摘 要： | 许多地区地下水是生态稳定的重要支撑或补充，确定地下水补给地表植被的临界埋深对地下水管理和生态安全至关重要。以西辽河平原为例，主要研究成果如下:①根据地下水补给植被原理划分包气带水分运动结构，描述地下水补给植被的作用机理和物理过程，定义地下水补给植被的临界埋深及相关物理概念。②根据植被根系吸收潜水蒸发的物理机制，地下水面附近由毛管水上升形成的潜水影响层是临界埋深计算的关键。③推导土壤毛管有效孔径计算推理公式，通过构建土壤微结构模型求解推理公式中的孔隙特征参数，解决毛管水最大上升高度的精确计算难题；④结合不同群落植被根系层厚度，形成地下水补给植被的临界埋深计算模型。⑤通过野外调查和观测试验实证，表明计算结果可靠，研究成果在科尔沁草原得到了及时应用。
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| 关 键 词： | 西辽河平原 包气带 地下水临界埋深 毛管水最大上升高度 |
| 收稿时间： | 2018-04-16 |
Critical depth of recharge of the vegetation by groundwater in the West Liaohe Plain |
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| CHEN Minjian,ZHANG Qiuxia,WANG Yong,YAN Long,DENG Wei.Critical depth of recharge of the vegetation by groundwater in the West Liaohe Plain[J].Advances in Water Science,2019,30(1):24-33. |
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| Authors: | CHEN Minjian ZHANG Qiuxia WANG Yong YAN Long DENG Wei |
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| Affiliation: | 1.China Institute of Water Resources and Hydropower Research, Beijing 100038, China;2.Power China Resources Ltd., Beijing 100048, China |
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| Abstract: | Groundwater in a many regions is an important support or supplement for ecological stability,the critical depth of recharge of surface vegetation by groundwater is critical to groundwater management and ecological security. Taking the West Liaohe Plain as an example,five results were concluded as follows:① The moisture movement structure in vadose zone was innovatively demarcated based on recharge of the vegetation by groundwater,and the mechanism and physical process of recharge of the vegetation by groundwater were described,and the critical depth of recharge of the vegetation by groundwater and related physical concepts were defined. ② According to the physical mechanism of absorbing the phreatic evaporation by the root system of the vegetation,the phreatic water affected layer which is formed by the rise of the capillary water is the key to critical depth. ③ The rational formula of the soil effective pore size was deduced,and the porosity parameter was calculated based on crystal structure model of soil particles,which dissolved the precise calculation of the maximum height of capillary water. ④ The calculation model for critical depth of recharge of the vegetation by groundwater was built by thickness of the root system. ⑤ The results were confirmed by massive field surveys. The results of the study were timely applied in the Horqin Grassland. |
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| Keywords: | West Liaohe Plain vadose zone critical depth of recharge of the vegetation by groundwater maximum height of the rise of capillary water |
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