本文主要研究了基于FPGA的坡面流流速仪。
This paper mainly discussed the design of overland flow velocity detecting instrument based on FPGA.
草被覆盖是影响坡面流流速变化过程及特征的重要因素之一。
Grass coverage has great influence on the change of overland flow velocity.
而坡面流弗劳德数在整个试验过程中均大于1，属于急流范围。
The Froude number of runoff flow larger than 1 under the all experiments and it is belongs to the turbulent condition.
顺坡种植油菜-花生处理，坡面流失泥沙钾、磷养分浓度高于休闲裸坡处理。
Nutrient concentration of soil loss under covered with vegetation over the fallow.
沥青瓦安装的叠层设计在水从屋顶坡面流到屋檐的过程中提供了双重保护层。
The overlapping design of the installed shingles provides a double layer of protection as the water flows down the roof slope to the roof edge.
由坡面流能量、能量损失、传递及其平衡得出了坡面流对坡面上土物的拖曳力。
It can get the drag force according to flow energy, energy loss, energy transfer and its balance.
通过室内模拟降雨试验，研究了不同盖度草地与裸地坡面的产流产沙过程与坡面流水动力学特性。
The generation process of runoff and sediment erosion and the hydrodynamic characteristics of flow on forage grass slope with different coverage are quantitatively studied in laboratory.
草地坡面的平均输沙率及坡面流速随草地盖度的增大而减小，而盖度对草地坡面径流量的影响则不明显。
The average sediment yield rate and flow velocity decrease with the increase of coverage, but the influence of coverage on runoff is not remarkable.
单元水文模型涉及到冠层截留、融雪、蒸散发、坡面流、非饱和土壤水运动和地下水出流等水文物理过程。
The former concerns with hydrological processes such as canopy interception, snowmelt, evapotranspiration, slope flow, soil flow and ground flow.
通过不同坡度、不同流量的组合放水冲刷试验，对坡面细沟侵蚀发生过程中的坡面流水动力学特性进行了研究。
The hydrodynamic characters of runoff in the process of rill erosion were studied by using runoff scouring experiment under the different slope gradients and the different flow discharges.
通过不同坡度、不同流量的组合放水冲刷试验，对坡面细沟侵蚀发生过程中的坡面流水动力学特性进行了研究。
The hydrodynamic characters of runoff in the process of rill erosion were studied by using runoff scouring experiment under the different slope gradients and the different flow discharges.
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