陕西师范大学旅游与环境学院,陕西,西安,710062
纸质出版:2014
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颜艳, 岳大鹏, 李奎, 等. 1953-2010年黄土洼天然淤地坝内洪水沉积物粒度旋回特征[J]. 水土保持通报, 2014,33(6):349-354.
YAN Yan, YUE Da-peng, LI Kui, et al. Grain Size Cycle Characteristics of Flood Sediments at Loess Depression Check Dam During 1953-2010[J]. Bulletin of Soiland Water Conservation, 2014, 33(6): 349-354.
颜艳, 岳大鹏, 李奎, 等. 1953-2010年黄土洼天然淤地坝内洪水沉积物粒度旋回特征[J]. 水土保持通报, 2014,33(6):349-354. DOI: 10.13961/j.cnki.stbctb.2014.06.067.
YAN Yan, YUE Da-peng, LI Kui, et al. Grain Size Cycle Characteristics of Flood Sediments at Loess Depression Check Dam During 1953-2010[J]. Bulletin of Soiland Water Conservation, 2014, 33(6): 349-354. DOI: 10.13961/j.cnki.stbctb.2014.06.067.
利用
137
Cs断代技术进行沉积物的测年
结合1953年以来的降雨资料
对黄土洼天然聚湫坝淤地的水成沉积物粒度旋回特征进行了分析。结果表明
坝淤地4 m沉积物是在近百年内形成的
物源比较单一
主要为洪水沉积物;降雨是影响沉积物粒度的主要因素;淤地坝内洪水沉积物粒度以粗粉砂为主
中砂含量很少
没有粗砂;沉积物剖面具有良好的沉积层理
剖面粒度旋回至少记录了42次较大的洪水事件
不同期次洪水沉积物之间粒度变化明显
反映了该区近百年内年流域侵蚀和降水量的变化。
Dating the sediments age with 137Cs
using rainfall data since 1953
the grain size cycle characteristics of hydatogen sediments in natural check dam of loess depression are analyzed. Results showed that the 4 m depth of sediments was formed in the recently one hundred years
and its material was mainly coming from flood erosion. Rainfall was the main factor affecting the particle size of sediments. Flood sediments was mainly composed of coarse silt
while the ratio of medium sand was low and the coarse sand was not found. The section of sediments had distinct sedimentary layers
which have recorded at least 42 flood events. The grain sizes of flood sediment layer in different periods changed significantly
which showed the rules of watershed erosion and precipitation variation in the recently one hundred years.
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