中文摘要：

《泥沙研究》为中国水利学会泥沙专业委员会编辑出版的学术性期刊（双月刊），是全国中文核心期刊和中国科技核心期刊，是本专业最有影响力的中文学术期刊。

英文摘要：

Rill dynamic processes and the temporal and spatial distribution of flow hydraulic characteristics were studied on Loess gentle slope of 15° by laboratory continuous rainfall simulation. The results showed that： Dynamic processes of rill erosion could be presented as splash erosion-sheet erosion-drop pit-intermittent rill-continuous rill-rill collapse. Rill length developed rapidly and rill width and rill depth developed slower. By the end of the 5th rainfall, rill horizon density, the largest rill length, width and depth respectively increased as 2.5, 10. 2, 0.8, 1.6 times than initial erosion; Velocity, runoff depth and Reynolds number increased with rainfall accumulation duration accompanied by minor fluctuations. The velocity in rill had a steady growth and runoff depth and Reynolds number in rill increased with fluctuant. Froude number had a larger fluctuation and it increased with the increasing of rainfall sessions. Rain and grain resistance were decreased and form resistance increased with rainfall duration. Total resistance had a larger fluctuation in the first two rainfalls and it reached the minimum at the third rainfall. Total resistance increased in the last two rainfalls and reached steady. Grain resistance was the dominant resistance in the first two rainfalls. However, form resistance in- creased to be the dominant resistance in last two rainfalls.