基于床面层能量平衡关系的推移质输沙率计算式

详细信息

Formula for bedload sediment transport rate based on energy balance relationship within bed-surface layer

摘要: 基于床面层内的水流能量关系,推导了推移质输沙率与床面层内有效水流功率的关系式.实测资料表明,推移质输沙率与床面层内有效水流功率有良好的相关性,且高于推移质输沙率与水流功率的相关性.经2 800组试验资料与天然河流资料的检验表明,该关系式的适应性良好,计算精度较高,并优于同类型的基于水流功率的推移质输沙率公式.
- 推移质,输沙率,床面层,水流功率
Abstract: Based on the relationship between energy and flow within the bed-surface layer,a relationship between the bedload sediment transport rate and effective stream power within the bed-surface layer is derived.The measured data show that the bedload sediment transport rate is related more closely to the effective stream power within the bed-surface layer than to the river stream power.Verification results of more than 2 800 runs of channel experiment data and field data show that this formula has good applicability and high accuracy,and is better than the other formulae for bedload sediment transport rate based on the stream power.
- bedload,sediment transport rate,bed-surface layer,stream power