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黄土高原丘陵沟壑区不同水体间转化特征 ———以韭园沟流域为例
王贺1; 李占斌2; 马波1; 肖俊波1; 张乐涛2
Source Publication中国水土保持科学

测定雨水、沟道水和井水的氢氧同位素组成,分析各水体的δD - δ18O 特征、氢氧同位素的时间变化和沿程变化,明
确各不同水体间的补给关系,估算流域上游沟道水补给井水的过程中因蒸发损失的水量。结果表明: 韭园沟流域
沟道水和井水的δD 和δ18O 之间具有良好的线性关系; 井水氢氧同位素相对于沟道水较富集且稳定,降水、气温、风
速等气象因子对沟道水氢氧同位素影响强烈,对井水影响较弱; 流域沟道水与井水均来源于大气降水,能够有效补
给地下水的大气降水氢氧同位素加权平均值为: δ18O = - 11‰,δD = - 79. 80‰; 沟道水向井水的转化以单向排泄补

Other Abstract

[Background] The Loess Plateau,which is characterized by weak ecological environments
and scarce water resources,is located in the Northwest of China. Due to the development of economy and
increment of population,this region has been faced with the increasing pressure of water resources
shortage. In order to achieve the scientific allocation and efficient utilization of water resources in
watershed,it is of great significance to conduct the investigations on characteristics of waters
transformation in the area. [Methods]As typical case for study,the Jiuyuangou Watershed,which is
located in Suide County,Yulin City of Shaanxi Province,was selected to investigate the characteristics of
waters transformation in the loess hilly and gully regions. Precipitation samples,gully-channel water
samples and well water samples were collected and tested to quantify the compositions of the hydrogen and
oxygen isotopes in each water during Sept. 15 to 19,2014. [Results] By analyzing the relationships
between δD and δ18 O in the gully-channel water and well water of Jiuyuangou,it was found that theevaporation line equation of gully-channel water was EL-1: δD = 5. 40 δ18 O - 20. 34( n = 13,R2 =
0. 99) ,and the evaporation line equation of the gully-channel water and well water was EL-2: δD =
5. 33δ18O - 20. 89( n = 19,R2 = 0. 98) . Additionally,the temporal and spatial variations of δ18O in
gully-channel water and well water were illustrated in the paper. It was visualized that the δ18O in gullychannel
water on Sept. 16 was the lowest during the period of sampling,and the δ18O in gully-channel
water increased progressively from the upper to the lower reaches of Jiuyuangou Watershed. The δ18O of
well water tended to be more positive and more stable than that of gully-channel water. The impacts of
rainfall,air temperature and wind speed on the variation of δ18O in gully-channel water was greater than
that on the variation of δ18O in well water. It was concluded that the surface water and ground water in
Jiuyuangou Watershed were both supplied by atmospheric precipitation. The weighted average value of
hydrogen and oxygen stable isotopes in precipitation which could effectively recharge the ground water was
δ18O = - 11‰ and δD = - 79. 80‰ respectively. Besides,the gully-channel water and well water in the
upper reaches presented a similar evaporation trend with similar slope and intercept,implying that there
was some degree of transformation between them. Furthermore,the main transformation relationship
between the gully-channel water and well water was characterized by unidirectional recharge from the
gully-channel water to the well water with a slow recharge rate,indicating that the retention time of the
water in Jiuyuangou Watershed was longer. [Conclusions] Finally,based on the above results,water
loss caused by evaporation in the transformation process between the gully-channel water and well water is
also calculated using Rayleigh distillation model and regression equation between absolute temperature T
and fractionation factor 18αw - v and 2αw - v with an assumption that the water vapor exchange is
equilibrated. The estimated result shows that the gully-channel water will lose 7% during the
transformation process.

Keyword氢氧同位素 地表水 地下水 瑞利蒸馏模型 黄土高原 丘陵沟壑区 韭园沟
Indexed By中文核心期刊要目总览
Document Type期刊论文
Recommended Citation
GB/T 7714
王贺,李占斌,马波,等. 黄土高原丘陵沟壑区不同水体间转化特征 ———以韭园沟流域为例[J]. 中国水土保持科学,2016,14(3):19-25.
APA 王贺,李占斌,马波,肖俊波,&张乐涛.(2016).黄土高原丘陵沟壑区不同水体间转化特征 ———以韭园沟流域为例.中国水土保持科学,14(3),19-25.
MLA 王贺,et al."黄土高原丘陵沟壑区不同水体间转化特征 ———以韭园沟流域为例".中国水土保持科学 14.3(2016):19-25.
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