| 1. | Finally , bedload transport rate of dujiangyan was computed with several representative formulas
分别用几种有代表性的输沙率公式计算了都江堰河段的推移质输沙率。 |
| 2. | 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。 |
| 3. | 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。 |
| 4. | Based on 9 years ' field data of bed - load transport and the corresponding hydraulic parameters at the erwangmiao hydrology station on dujiangyan river , 6 formulae for the prediction of the sediment transport are analyzed
摘要以都江堰二王庙水文站9年实测的卵石推移质输沙率资料和对应的水力参数为基础，选用6个有代表性的公式进行了分析计算和对比。 |
| 5. | The scale effects due to unsimilar bed risistance is discussed in detail , and the correct way of scour depth is supposed . at last , a new transport rate formulas of uniform or nonuniform bed load is given
本文还对由于阻力不相似而引起的比尺效应进行了较详细的讨论，从理论上给出了冲刷深度比尺效应的修正方法及新的均匀、非均匀推移质输沙率的计算公式。 |
| 6. | 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。 |
| 7. | In this paper , gravel characteristics and variety along the river were studied with digital image technology ; variety of grain sizes distribution of the river bed along jinmahe section in minjian river was analyzed ; several representative formulas of bedload transport rate were proved according to the field data of dujiangyan
本文采用数字图象技术研究了卵石颗粒的几何特征及沿程变化；分析了岷江金马河河段河床质级配的沿程变化；根据都江堰的输沙率资料论证了几家有代表性的推移质输沙率公式的实用性。 |
| 8. | Abstract : variations of flow pattern , flow velocity in deep poo l and side bar , mainstream thread , and water surface , caused by excavation project , are investigated by two - dimensional mathematical model in an orthogonal curvili near coordinate system . the change of bed - load transport rate , and redeposition r ate are predicted . the influences of the excavation project on navigation are ana lyzed . grid - type and flat - type excavation alternatives are proposed and discuss ed
文摘:采用正交曲线坐标系下的河道平面二维数学模型，研究了嘉陵江何家碛边滩采砂后河道流势、流态、滩槽流速、主流位置、水面高程及比降的变化规律，预测了采砂方案完成后卵石推移质输沙率变化及其对航道的影响，并对格形开挖和平整开挖方案进行了比较分析 |
| 9. | The theory of minimum entropy production or minimum rate of energy dissipation shows that a river is stable when it is in a relative equilibrium condition . ( 3 ) the river facies formulas of alluvial river have been developed using the theory of minimum rate of energy dissipation together with flow continuity and motion equations , suspended load transport or bed load transport equation . ( 4 ) the causes of the river patterns are explained using the theory of minimum rate of energy dissipation
（ 3 ）基于最小能耗率原理，以水流能耗率作为目标函数，以水流连续方程、水流运动方程及悬移质挟沙力公式或推移质输沙率公式作为约束条件，通过对目标函数求条件极值，分别推导出以悬移质造床为主的显式河相关系式和以推移质造床为主的显式河相关系式。 |
