推移质
又称床沙载荷(bed load)、底载荷(bottom load)或推移载荷(solid load)牵引载荷(traction load)。指在流体介质推动下，以滚动、移动和跳跃形式沿河底搬运的碎屑物质。通常粗碎屑(如砾、砂)作滚动或滑动搬运，较细碎屑(如细沙、粉沙)则呈跳跃搬运。但搬运方式和碎屑大小之间的关系不是恒定的，随水流强度而变，水流强度大时，跳跃颗粒偏粗，反之则偏细。颗粒的搬运方式可随流动强度变化而相互转化，随着流速增大，滑动或滚动颗粒可变为跳跃，跳跃可变为悬浮；流速降低时则发生相反的转变。
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contributed at 2011-09-27
Classification(s)
●
Earth System(in Chinese) Sedimentology and sedimentary petrology
Detailed Description
| English |
|---|
| Name | traction load,bed material load |
| Chinese |
|---|
| Name | 推移质 |
| Description | 又称床沙载荷(bed load)、底载荷(bottom load)或推移载荷(solid load)牵引载荷(traction load)。指在流体介质推动下，以滚动、移动和跳跃形式沿河底搬运的碎屑物质。通常粗碎屑(如砾、砂)作滚动或滑动搬运，较细碎屑(如细沙、粉沙)则呈跳跃搬运。但搬运方式和碎屑大小之间的关系不是恒定的，随水流强度而变，水流强度大时，跳跃颗粒偏粗，反之则偏细。颗粒的搬运方式可随流动强度变化而相互转化，随着流速增大，滑动或滚动颗粒可变为跳跃，跳跃可变为悬浮；流速降低时则发生相反的转变。 |
How to Cite
NNU_Group (2011). 推移质, Concept & Semantic, OpenGMS,
https://geomodeling.njnu.edu.cn/repository/concept/93a61915-d0e1-467d-8501-4150a7d29036
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