地理研究 ›› 1991, Vol. 10 ›› Issue (1): 65-72.doi: 10.11821/yj1991010007
• 论文 •
He Naihua, Zhu Xuanqing
Abstract: The present meandering streams in Hebei Plain, with I.28-I.79 sinuosity, are mixing loaded rivers.Usually, there is an erosional surface and a fluvial stagnant phase sediment of pebbles and muddy nodules at the base of the point-bar. Above it, sediment developed fining upward trend of the grainsize, and became silt with plant roots at the top. The depositional structures were mainly made up of trough-cross beddings, accompanied with parallel、horizontal、climbing and ripple beddings, occasionally tabular beddings, Sametimes, different deformational structures were also found.The basic units of point-bars in meandering streams are inclined bodies, One point-bar is probably composed of several diagonal sedimentary bodies. Every body had the fundamental characters of the point-bar. Every two adjacent bodies bordered each other with an inclined erosion surface. It is often situated in the upper-middle part, sometimes reached to the base of the sediment, A mark of mud or muddy silt cover on the sedimentary body is usually found, which shows significant change of the streamflow.
Inclined erosion surface,
Inclined Sedimentary bodies,
何乃华, 朱宣清. 河北平原曲流河沉积特征及其模式[J]. 地理研究, 1991, 10(1): 65-72.
He Naihua, Zhu Xuanqing. PRESENT DEPOSITIONAL FEATURE AND DEPOSITIONAL MODEL OF MEANDERING STERAMS IN HEBEI PLAIN[J]. GEOGRAPHICAL RESEARCH, 1991, 10(1): 65-72.
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