| 许炯心.天然河道挟沙水流的复杂行为及其在河型形成中的意义[J].水利学报,1999,30(3): |
| 天然河道挟沙水流的复杂行为及其在河型形成中的意义 |
| Complicated behaviors of silt water flow in rivers and its geomorphological implication |
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| DOI： |
| 中文关键词: 挟沙水流，系统复杂行为，能耗，河床形态，河型 |
| 英文关键词: silt water flow, stream power, complicated behaviors, channel pattern. |
| 基金项目: |
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| 中文摘要: |
| 天然河道挟沙水流具有复杂的力学行为。随着含沙量的增大，挟沙水流能耗率也增大，但当含沙量超过某一临界值之后，能耗率则迅速减小。在这种微观层次上的复杂行为的影响下，河床形态和河型随含沙量的变化也呈现出复杂的面貌，这实质上是挟沙水流复杂行为的宏观表现。本文所揭示的冲积河流河床形态和河型随含沙量变化的复杂图形，对于小浪底水库建成后黄河下游游荡河道的调控治理有重要意义 |
| 英文摘要: |
| Based on data from alluvial rivers in China, some complicated mechanical behaviors of silt water flow in river are investigated. It shows that the channel geometry also exhibits some complicated behaviors in response to variation of suspension concentration. With the increase of concentration, the channel width-depth ratio increases. But it will decrease, after reaching a maximum. When suspension concentration is low, the river tends to meandering pattern. The increase in concentration leads to transformation from meandering to braided patterns. However, when the concentration further increases and enter the range of hyper-concentrated flows, meandering pattern appears again. |
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