Characteristics of slope runoff and sediment production under rainfall events in the plateau area of western Guizhou
Gu Libin, Zhang Xingqi, Yang Guangxi, Gu Zaike
1. School of Geographic and Oceanographic Sciences at Nanjing University, 210023, Nanjing, China; 2. Guizhou Monitoring Station of Soil and Water Conservation, 550002, Guiyang, China
Abstract：Based on field observations of runoff and sediment generated on runoff plots and rainfall data, we studied quantitatively the impact of rainfall on slope runoff and sediment production in the plateau area of western Guizhou. The results showed that: 1) there are 22 events of erosive rainfall annually on average in the study area, in which rainfall events of moderate and low intensities account for 93.02% of the total number of events. 2) Characteristics of slope runoff and sediment production have a close relationship with the rainfall distribution within a year. The amount of sediment generated from May to August accounted for 99.2% and that of runoff during the same period of time accounted for 95.8% of the total. 3) The amount of slope sediment showed a significantly exponential relationship with the amount of rainfall with an equation of M = 0.346e0.109P . 4) Slope runoff and sediment production were significantly correlated with rainfalls of moderate and high intensities, which can be demonstrated by that 57.3% of the total runoff and 91.5% of the total sediment were produced in four heavy rainfall events.
顾礼彬1, 张兴奇1 , 杨光檄2, 顾再柯2. 黔西高原坡面次降雨产流产沙特征[J]. 中国水土保持科学, 2015, 13(1): 23-28.
Gu Libin, Zhang Xingqi, Yang Guangxi, Gu Zaike. Characteristics of slope runoff and sediment production under rainfall events in the plateau area of western Guizhou. SSWCC, 2015, 13(1): 23-28.
2015, Vol. 13 
