雨强及坡度对黄土区草地坡面水流流速的影响.

The study of flow velocity on grassland slope is of great significance to understand dynamic of erosion deeply and to make scientific decision on soil and water conservation and ecological construction in Loess Plateau. In order to study the variation of flow velocity with rainfall intensity and slope on grassland slope, in the paper, we adopted artificial rainfall experiment to study flow velocity. The results show that: a) under five different rainfall intensities and slopes, variation of flow velocities with time first increase rapidly after becoming increase slowly or stably and relationships between them can be described by the power function equations; b) average runoff velocities on grassland slopes increase with the increase of rainfall intensities and slopes respectively, which can be described by the logarithmic function equation; c) average velocities of grassland slope with rainfall intensities and slopes can be described by the dual logarithmic function equation and in the experiment, the influence of slope on grassland average velocity is greater than the influence of rainfall intensity to the grassland average velocity. [ABSTRACT FROM AUTHOR]