黄河班多水电站工程区荒草地坡面产流过程试验研究

Experimental Study of Runoff Processes on Waste Grassland in Project Area of Banduo Hydropower Station of Yellow River

荒草地是黄河班多水电站工程区最主要的原生地面类型,阐明其产流过程,可为揭示与评价该工程区水土流失过程与强度奠定重要基础。采用野外人工放水产流试验方法,对黄河班多水电站工程区内荒草地坡面产流过程进行了研究。(1)同坡度不同供水流量下,荒草地坡面产流率随供水过程的动态变化皆可用对数方程描述;(2)同供水流量不同坡度下,荒草地坡面产流率随供水过程的变化与不同供水流量下产流率变化过程总体上具有相似性,都是随供水历时的增长呈先增大后趋于稳定的趋势;(3)荒草地坡面产流深随供水流量的增大而显著增加,可用对数方程来描述;(4)荒草地坡面产流深随坡度的增大而增加,可用指数方程来描述;(5)荒草地坡面产流深随坡度、供水流量的动态变化可用二元线性方程描述,供水流量对产流深的影响大于坡度的影响。

Waste grassland is the main native ground type in the project of Banduo hydropower station of the Yellow River.Description of runoff processes in the area can reveal and estimate soil erosion processes and its degree.Based on field scouring experiments,runoff processes on waste grassland were studied and following results were obtained:(1)For different water supply discharges and the same slope,runoff yield varied with runoff process could be described by a logarithmic equation.(2)Runoff processes on waste ...