Quantitative Study of Groundwater Recharge Beneath a Village Pond in Loess Tableland Based on Stable Isotopes

Cheng Liping; Wang Yaping; Liu Peisong; Li Yanjiao

doi:10.13961/j.cnki.stbctb.2021.05.009

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Quantitative Study of Groundwater Recharge Beneath a Village Pond in Loess Tableland Based on Stable Isotopes

- Quantitative Study of Groundwater Recharge Beneath a Village Pond in Loess Tableland Based on Stable Isotopes
- Bulletin of Soiland Water Conservation Vol. 41, Issue 5, Pages: 60-66(2021)
- 作者机构：
  
  1. 平顶山学院化学与环境工程学院,河南,平顶山,467000
  2. 西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2021.05.009
  CLC： S124;S152.7
- Published：2021
- 稿件说明：
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Cheng Liping, Wang Yaping, Liu Peisong, et al. Quantitative Study of Groundwater Recharge Beneath a Village Pond in Loess Tableland Based on Stable Isotopes[J]. Bulletin of Soiland Water Conservation, 2021, 41(5): 60-66.
DOI：

Cheng Liping, Wang Yaping, Liu Peisong, et al. Quantitative Study of Groundwater Recharge Beneath a Village Pond in Loess Tableland Based on Stable Isotopes[J]. Bulletin of Soiland Water Conservation, 2021, 41(5): 60-66. DOI： 10.13961/j.cnki.stbctb.2021.05.009.

摘要

[目的

]

定量研究黄土塬区村庄涝池对地下水的补给情况，为地下水资源持续利用提供理论依据。[方法

]

通过测定长武黄土塬区村庄涝池和农田深剖面土壤湿度及土壤水氢氧稳定同位素组成，利用同位素示踪技术计算村庄涝池对地下水的补给量。[结果

]

①涝池深剖面土壤水分平均值为25.5%，大于农田深剖面土壤湿度（20.6%）； ②涝池土壤水的δD值介于-117.83‰~-56.66‰之间，δ

O值介于-16.63‰~-7.72‰之间，农田土壤水的δD介于-81.76‰~-52.03‰之间，δ

O值介于-10.64‰~-6.35‰之间；与农田相比，涝池土壤水分受蒸发影响较小，同位素组成偏负，且变幅较大； ③涝池土壤水同位素剖面保留了较大降水事件的同位素信号，表明涝池水通过活塞流形式对地下水进行了补给，活塞流速度为0.26 m/d；在涝池集水区内，地下水年均潜在补给量为134 mm，占年降水量的23.1%。[结论

]

黄土塬区涝池是地下水重要的补给来源。因此，应加强涝池保护、恢复和重建工作，确保该区地下水的持续补给和利用。

Abstract

[Objective] Groundwater recharge beneath a village pond in the loess tableland was quantitatively studied to provide a theoretical basis for the sustainable utilization of groundwater resources in the study area.[Methods] Soil moisture

and stable hydrogen and oxygen isotopic composition of soil water in deep loess profiles (DLP) beneath a village pond and cropland in Changwu loess tableland were measured. The isotopic tracing technique was used to estimate groundwater recharge beneath the village pond.[Results] ① The average soil moisture of DLP beneath the village pond was 25.5%

which was greater than that of cropland (20.6%). ② The values of δD and δ18O of soil water were -117.83‰~-56.66‰ and -16.63‰~-7.72‰

respectively

beneath the village pond

and -81.76‰~-52.03‰ and -10.64‰~-6.35‰ beneath the cropland

respectively. The effect of evaporation on soil water beneath the pond was weaker than it was in cropland

and the stable isotopes of soil water were more negative with larger variation in isotopic composition. ③ The isotope profile of soil water beneath the village pond retained the isotopic signals of large precipitation events

indicating that groundwater was recharged by piston flow beneath the village pond

and had an infiltration velocity of 0.26 m/d. The mean annual recharge rate of groundwater was 134 mm/yr in the pond catchment

accounting for 23.1% of the annual precipitation.[Conclusion] Village ponds are an important recharge source for groundwater in the Loess Plateau. Thus

efforts should be made to strengthen the protection

restoration

and reconstruction of ponds to ensure the continuous recharge and utilization of groundwater in the Loess Plateau.

关键词

Keywords

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