| 1. | 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 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。 |
| 2. | 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 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。 |
| 3. | An expression is derived using basical concepts of physics ( i . e . mass conservation ) , to define the relationship between sediment transport rate and vertical flux of sediment to the seabed 从基本的物理概念和物质守恒定律导出了海底沉积物通量的计算表达式,应用该式取得了与实际海域相符的海底冲淤分布图。 |
| 4. | Verification results of more than 2800 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 经2800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。 |
| 5. | The results show that there is a power function relation between rainfall intensity and runoff duration and a linear relation between rainfall intensity and sediment transport rate of unit width , and we find the experienced coefficient of above relations through regression analysis 结果表明,产流时间和降雨强度之间存在幂函数关系,与单宽输沙率之间存在线性关系,单宽输沙率与单宽流量之间亦存在线性关系。 |
| 6. | This method is better than the traditional method that relates the divergence of sediment transport rate to the deposition rate . the output of the tidal modelling reaches the required precision according to a comparison between the calculated tidal amplitudes / phases and the observed ones at 42 coastal tide gauge stations 潮汐潮流的模拟计算结果与沿岸42个潮汐测站的实测值结果对比达到了精度的要求,同时,计算得到的各分潮同潮图与实测结果相符。 |
| 7. | Topography fractal dimension related with process of development of watershed physiognomy and represented degree of watershed development , v ) sediment yield intensity of watershed model reflected erosion characteristic of watershed model in different development phase . simulating experiment indicated that sediment yield intensity took on the trend that they changed from small to big then decreased gradually . the relationship of average sediment transport rate and sediment yield rate per mm rainfall with topography fractal demension is expressed by gaussian model and this model is similar with relationship between volume and surface area ( 5 )流域模型产沙强度的变化反映了流域模型在不同发育阶段的侵蚀特征,模拟试验研究结果表明:在整个流域模型地貌地貌的发育过程中,其产沙强度呈现由小到大,然后又逐渐减小的总体趋势,流域模型单位降雨产沙率及平均输沙率与地形分维数表现为gaussian模型关系,其关系形式与结论3中相对体积和表面积之间关系相似,进一步说明了以地形分维数表达地形变化的合理性。 |