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利用淤地坝泥沙沉积旋廻反演小流域侵蚀历史
Alternative TitleINVESTIGATING SOIL EROSION HISTORY OF A SMALL WATERSHED USING SEDIMENT COUPLET IN A DAM
薛凯; 杨明义; 张风宝; 孙喜军
2011
Source Publication核农学报
Volume25Issue:1Pages:0115 ~ 0120
Abstract黄土高原丘陵沟壑区小流域广泛分布的淤地坝不仅是治理水土流失的重要工程措施,同时也成为记录小流域侵蚀产沙历史变化过程的重要载体。本研究以陕西省绥德县王茂沟流域一级支沟——淤积年限为34年(1957-1990),淤积深度为11.325m的闷葫芦坝为研究对象,根据坝地沉积剖面的物理特征,发现该沉积剖面共有75个泥沙沉积旋廻,其中深度为818.5~903.5cm的沉降旋廻(第67个)137Cs含量最高,达4.90Bq/kg。根据1957-1990年间的降雨量资料和137 Cs的时标特征,建立了淤地坝沉积序列的时间坐标。在此基础上依据泥沙沉积量的累积曲线,将淤地坝运行期间小流域侵蚀历史划分为3个时期:1957-1964年的侵蚀剧烈期,年均侵蚀模数为16578.5t/km2;1965-1983年侵蚀相对平缓期,年均侵蚀模数为6062.9t/km2;1984-1990年,侵蚀再次增大期,年均侵蚀模数为19127.5t/km2。
Other AbstractIn the Loess hilly-gully region,as the most important engineering measure for controlling soil and water losses,check dams play an important role in recording the historical variation process of sedimentation in a small watershed.A sediment deposit profile with a sediment history of 34a(1957-1990) and a vertical length of 11.325m was collected in a dam in Wangmaogou watershed in Suide County in Shaanxi Province.Based on the physics characters of the sediment profile,75 sediment couplets were found.The peak ...
Keyword黄土高原丘陵区 淤积坝 137cs 沉积旋廻 库容曲线
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/5103
Collection水保所知识产出(1956---)
Recommended Citation
GB/T 7714
薛凯,杨明义,张风宝,等. 利用淤地坝泥沙沉积旋廻反演小流域侵蚀历史[J]. 核农学报,2011,25(1):0115 ~ 0120.
APA 薛凯,杨明义,张风宝,&孙喜军.(2011).利用淤地坝泥沙沉积旋廻反演小流域侵蚀历史.核农学报,25(1),0115 ~ 0120.
MLA 薛凯,et al."利用淤地坝泥沙沉积旋廻反演小流域侵蚀历史".核农学报 25.1(2011):0115 ~ 0120.
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