| 基于地中渗透仪的入渗补给方式分析 |
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| 引用本文： | 郭会荣,靳孟贵,齐登红,朱中道.基于地中渗透仪的入渗补给方式分析[J].水文地质工程地质,2007,34(4):107-111,115. |
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| 作者姓名： | 郭会荣 靳孟贵 齐登红 朱中道 |
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| 作者单位： | 1. 中国地质大学环境学院,武汉,430074
2. 河南省地质环境监测总站,郑州,450003 |
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| 基金项目： | 中国地质大学校科研和教改项目;国家自然科学基金 |
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| 摘 要： | 文章通过在某均衡试验场地中的渗透仪上开展土壤水流穿透试验,分析灌溉水对地下水补给方式。试验结果表明:淹灌条件下,粉细砂扰动土中的穿透曲线为典型的单峰对称型,表明粉细砂中的土壤水通过活塞式入渗补给地下水;而亚粘土中的穿透曲线显示多峰、优先穿透、拖尾等现象,表明亚粘土中的土壤水以优势流方式补给地下水。通过对均衡场降水入渗补给的长观资料分析发现:在自然降雨条件下亚粘土中优势流明显,粉细砂中主要以活塞流为主。
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| 关 键 词： | 地下水补给方式 地中渗透仪 亚粘土 优势流 干缩裂隙 |
| 文章编号： | 1000-3665（2007）04-0107-05 |
| 修稿时间： | 2006-07-182007-03-23 |
Characterization of groundwater recharge processes based on large lysimeters |
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| GUO Hui-rong,JIN Meng-gui,QI Deng-hong,ZHU Zhong-dao.Characterization of groundwater recharge processes based on large lysimeters[J].Hydrogeology and Engineering Geology,2007,34(4):107-111,115. |
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| Authors: | GUO Hui-rong JIN Meng-gui QI Deng-hong ZHU Zhong-dao |
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| Institution: | 1. Environmental school, China University of Geosciences, Wuhan 430074, China ; 2. Geological Environment Monitoring Station of Henan Province, Zhengzhou 450003, China |
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| Abstract: | Understanding groundwater recharge processes is critical to assess groundwater recharge resources and pollutant transfer to groundwater.Breakthrough experiments were conducted with different sizes of lysimeters in undisturbed silt loam soil and repacked fine sand were used to characterize groundwater recharge processes in this paper.Breakthrough curves of 2 contrasting soils exhibite different shapes.The shapes of breakthrough curves as well as measurements of outflow rate and unsaturated profile moisture content indicate that piston flow of infiltrating recharge mainly occurred in fine sand but preferential flow of infiltrating recharge was obvious in silt loam soil.When irrigation lasted for a long period of time,the soil moisture content increased and the preferential flow in silt loam soil became less obvious and disappeared.This shows that the preferential pathways in silt loam soil are mainly shrinkage cracks induced by swelling and shrinking of clay minerals.In this study groundwater recharge from precipitation are also analyzed.It is found that preferential flow occurs in silt loam soil,and piston flow occurs in fine sand. |
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| Keywords: | groundwater recharge process lysimeter silt loam preferential flow shrinkage crack |
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