How much information can soil solute profiles reveal about groundwater recharge?
How much information can soil solute profiles reveal about groundwater recharge?
复制标题
土壤溶质剖面可以揭示多少有关地下水补给的信息？
DOI：
10.1007/s12303-015-0069-3
复制
发表时间：
2016-02
影响因子：
1.2
通讯作者：
Li, Zhi
中科院分区：
文献类型：
--
作者：
Huang, Tianming;Yang, Shuo;Liu, Jilai;Li, Zhi
非饱和带是地下水和地表之间的重要联系，可以为水和污染物提供储存能力。因此，非饱和带的溶质剖面可以为地下水补给示踪提供更多的信息。本文以黄土高原雨养农业区（洛川黄土平原）为例，说明了从溶质剖面中可以获得的厚包气带补给信息。结果表明，用3种方法计算的入渗速率为0.19 ~ 0.30myr ~（-1），补给速率为36-67 mmyr ~（-1），评估Cl-峰值、氯化物质量平衡和硝酸盐水平。年降水量达到地下水位所需的时间为133-316年，地下水不含氚。人类活动引入的硝酸盐主要分布在上部包气带（6 m以上），地下水硝酸盐含量（3.7 ~ 9.6 mg l-1as NO3）保持在基线水平。发现非饱和带的储存能力延迟污染物进入含水层的入口。
The unsaturated zone is an important link between groundwater and the land surface, and can provide storage capacity for both water and contaminants. Consequently, the solute profile of the unsaturated zone can provide much information on groundwater recharge using tracers. This study takes a rain-fed agricultural area (Luochuan loess plain) in the Chinese Loess Plateau as an example to demonstrate how much recharge information in the thick unsaturated zone can be obtained from the solute profile. The results show that the recharge rate is 36–67 mm yr–1and infiltration rate is 0.19 to 0.30 m yr–1, as obtained using three methods, i.e., evaluating the Cl-peak, chloride mass balance, and nitrate levels. The amount of time needed for annual precipitation to reach the water table is 133–316 years, and the groundwater is tritium free. The nitrate introduced by human activities is mainly distributed in the upper unsaturated zone (above 6 m), and the groundwater nitrate content (3.7 to 9.6 mg l–1as NO3) remains at baseline level. The storage capacity of the unsaturated zone is found to delay the entrance of pollutants into the aquifer.
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影响因子：
6.4
作者：
R. Lin;K. Wei
通讯作者：
R. Lin;K. Wei
影响因子：
2.9
作者：
F. Phillips
通讯作者：
F. Phillips
DOI：
--
发表时间：
1985
期刊：
--
影响因子：
--
作者：
Dongsheng Liu
通讯作者：
Dongsheng Liu
影响因子：
2.4
作者：
W. Edmunds;C. Gaye
通讯作者：
W. Edmunds;C. Gaye
影响因子：
3.4
作者：
W. Edmunds
通讯作者：
W. Edmunds