水土保持学报2017，Vol.31Issue(2)：45-49,102,6.DOI:10.13870/j.cnki.stbcxb.2017.02.009
指纹法研究花岗岩区典型崩岗小流域悬浮泥沙来源
Fingerprinting Suspended Sediment Sources in a Typical Collapsing Hill Watershed in the Granitic Region
摘要
Abstract
To analyse suspended sediment sources in a typical collapsing hill watershed in the granitic region,a collapsing hill watershed in the Longmen town,Anxi County,was selected as the research object.85 soil samples from four kinds of sediment source (erosive woodland,tea plantations,cultivated land,and the erosive area of a collapsing hill area) were collected,in the meantime,erosion suspended sediment in the sampler in the channel was also collected.34 kinds of fingerprint factors of the samples were analyzed,the best combination of fingerprint factors was screened,and the migration regularities of the sediments derived from different sources were figured out.The results showed that there were significant differences in the same fingerprint factors of the suspended sediments derived from different sources.By using the KruskalWallis test and multivariate discriminant,the combination of Ca,Li,Sn,K and Ba was screened as the best combination of fingerprint factors,of which the cumulative contribution rate was more than 90 ％.The relative contribution of suspended sediment was approximately 33 ％ by tea plantations,27 ％ by cultivated land,and 20％ by erosive woodland and collapsing hills.The goodness-of-fit test value of the Hybrid model was 0.89.Further analysis showed that the influence of rainfall on collapsing erosion was the greatest.Suspended sediment yields of collapsing erosion and tea plantations per unit area were obviously higher than those of other sediment sources,indicating that the prevention and control measures should be focused on the collapsing erosion and tea plantations in this study area.关键词
崩岗/小流域/复合指纹法/悬浮泥沙Key words
collapsing hill/small watershed/composite fingerprints/suspended sediment分类
天文与地球科学引用本文复制引用
郝福星,黄炎和,林金石,蒋芳市,葛宏力,魏佳,刘菁文..指纹法研究花岗岩区典型崩岗小流域悬浮泥沙来源[J].水土保持学报,2017,31(2):45-49,102,6.基金项目
福建省自然科学基金项目(2015J01156) （2015J01156）
国家自然科学基金项目(41571272) （41571272）
国家科技支撑计划项目(2014BAD15B0303) （2014BAD15B0303）
