摘要
为了解底孔防沙防草和排沙效益，必须了解底孔的冲刷坑形态．本文在分析已建水库实测地形资料的基础上，初步将坝前冲刷漏斗分成大漏斗与小漏斗，并根据回归分析得出了小漏斗坡度的经验关系式．
In order to know the effect of the bottom outlet on draining sediment and weeds, it is necessary to know the character of the local scour of the bottom outlet. On the basis of analysing of the measured landscape data of the reservoir built, the scour funnels are divided into big funnels and small funnels, and an experience formula of the small funnel gradient on the basis of regression analysis is obtained.
