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黄土高原丘陵沟壑区流域不同水体氢氧同位素特征 ———以纸坊沟流域为例
王贺1; 李占斌2; 马波1; 马建业1; 张乐涛2
Source Publication水土保持学报

同位素组成,分析了各水体氢氧同位素的δD-δ18 O关系和季节变化特征,阐明了土层深度、植被类型、坡
δ18 O-3.22(n=18,R2=0.96),地表水的蒸发线方程为δD=6.77δ18 O-5.32(n=13,R2=0.72),土壤水的
蒸发线方程为δD=3.50δ18 O-34.00(n=756,R2=0.76);各水体δ18 O富集程度为:刺槐林土壤水≈荒草
地土壤水>降水>地表水。降水与土壤水(刺槐林和荒草地)δ18 O季节效应明显,浅层50cm土壤水的平
均传输时间约为1个月;地表水δ18 O变幅较小、组成均一、季节效应不明显,推断其为多次历史降水混合形
中,土层深度对浅层土壤水δ18 O影响达到极显著水平。不同土层间土壤水δ18 O差异性随土层深度差值的

Other Abstract

In order to study the characteristics of hydrogen and oxygen isotopes in precipitation,surface water
and soil water of the loess hilly and gully region systematically,the Zhifanggou watershed,which is located
in Ansai County,Yan’an City of Shaanxi Province,was selected to be the research object.Precipitation
samples,surface water samples and soil samples in locust forest and waste grassland were collected from
March to September of 2015to test the compositions of the hydrogen and oxygen isotopes.By analyzing the
seasonal variations of hydrogen and oxygen isotopes and the relationships betweenδD andδ18 O in the precipitation,
surface water and soil water of Zhifanggou watershed and their seasonal changes,the effects of soil depth,
vegetation type,and slope direction and position on characteristics of hydrogen and oxygen isotopes in soil
water were explored.The results showed that the local meteoric water line equation wasδD=6.71δ18 O-
3.22(n=18,R2=0.96),the evaporation line equation of the surface water wasδD=6.77δ18 O-5.32(n=
13,R2=0.72),and the evaporation line equation of the soil water wasδD=3.50δ18 O-34.00(n=756,R2=
0.76).δ18 O in different water listed in the order of soil water(locust forest)≈soil water(waste grassland)>
precipitation>surface water.The seasonal variations ofδ18 O in precipitation and soil water were obvious,
while that in the surface water was not obvious with small variable amplitude and stable composition.It can
be concluded that the average transmission time of soil water in the 0—50cm soil layer was about a month,and the surface water came from a blend of multiple historical precipitations.Finally,the influence degrees of
underlying surface factors(soil depth,vegetation type,slope direction and position)on the hydrogen and
oxygen isotopes in soil water were calculated,which listed in the order of soil depth>slope direction>vegetation
type>slope position.The influence of soil depth onδ18 O was extremely significant in the surface layer,and the
difference ofδ18 O between different layers increased with the difference of soil depth.The difference ofδ18 O tended to
be very significant when the difference of soil depth was greater than 15cm.Therefore,the 0-15cm soil layer was
the active zone of soil moisture,which was mainly caused by precipitation and soil moisture evaporation.

Keyword黄土高原 纸坊沟 氢氧同位素 降水 地表水 土壤水
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流域不同水体氢氧同位素特征 ———以纸坊沟流域为例[J]. 水土保持学报,2016,30(4):85-90.
APA 王贺,李占斌,马波,马建业,&张乐涛.(2016).黄土高原丘陵沟壑区流域不同水体氢氧同位素特征 ———以纸坊沟流域为例.水土保持学报,30(4),85-90.
MLA 王贺,et al."黄土高原丘陵沟壑区流域不同水体氢氧同位素特征 ———以纸坊沟流域为例".水土保持学报 30.4(2016):85-90.
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