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地理科学  2014 

汉江上游现代大洪水滞流沉积物的粒度分布特征研究

, PP. 1369-1376

Keywords: 现代大洪水,滞流沉积物,粒度,空间分布,汉江上游

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Abstract:

对汉江上游现代大洪水高水位滞流沉积物(SWD)系统地采样测试分析,结果表明汉江上游现代大洪水SWD沉积物性质是沙质粘土或粘土质沙、沙质粉沙或粉沙质沙。其分布特征大致分为两大类安康段以上基本是以粉沙质沙或沙质粉沙为主,安康段以下基本是沙质粘土或粘土质沙。粒度成分和粒度参数都反映现代洪水SWD经过充分的分选,但是受多种因素影响,其粒径组成具有明显的空间变化。水库或大坝对大洪水SWD的粒度自然分布频率单峰曲线尖窄的形状没有明显的影响,而更多与其沉积的微地貌环境和水动力条件有关。

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