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Alternative TitleA Case Study on Land Use Changes and Sediment Sources by the δ13 C Technique in the Hilly Sichuan Basin,the Upper Reaches of Yangtze River,China
高进长1,2; 朱虹3; 唐强1; 刘秀明1; 龙翼4; 张信宝1; 朱波1
Corresponding Author龙翼
Source Publication山地学报
Other Abstract



The δ13C techniques are employed to study land use changes and sediment sources in the Hilly Sichuan Basin. Some samples of pond sediments,channel bed sediments and four types of surface soils were collected in 2010 and 2011. The results show that the average δ13C values of surface soils for forest slopes,recently abandoned
cultivated sloping land and cultivated terraces are very close and they are - 26.40‰,- 25.91‰ and - 25.81‰,respectively. Those δ13C values indicate that the soil organic matter is residues of C3 plants in general,which are dominated in the natural plants of the region. Although maize is a common crop on rainfed fields in the catchment,
it has little influence on the δ13C values of the soil organic matter. By integrated analyses of the δ13C values in the sediments with the land use changes,it is suggested that δ13C values in soils and sediments are a good indicator for land use conditions. The lower values of around - 26‰ indicates good forest coverage conditions on the hillslopes in the catchment,while the higher value of around -24.30‰ indicates poor forest coverage conditions in the region. As the organic matter in the sediments is a mixture of soil organic matter,biological detritus as well as village sewages,δ13 C technique can only be used for quantitative assessment of sediment contributions from different sources under such environment conditions where the organic matter in sediments is predominately contributed from soil organic matter. However,the technique is helpful for qualitative assessment of sediment  contributions.

Keyword土地利用变化 泥沙来源 Δ13c技术 川中丘陵区
Subject AreaS157
Indexed ByCSCD
Citation statistics
Cited Times:3[CSCD]   [CSCD Record]
Document Type期刊论文
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
高进长,朱虹,唐强,等. 川中丘陵区小流域土地利用变化和泥沙来源示踪的δ13C技术[J]. 山地学报,2015,33(5):521-527.
APA 高进长.,朱虹.,唐强.,刘秀明.,龙翼.,...&朱波.(2015).川中丘陵区小流域土地利用变化和泥沙来源示踪的δ13C技术.山地学报,33(5),521-527.
MLA 高进长,et al."川中丘陵区小流域土地利用变化和泥沙来源示踪的δ13C技术".山地学报 33.5(2015):521-527.
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