抄録
Nowadays it begins to design and construct slit sabo dam which has a slit on the crown of sabodam in the hope of sediment control in our country.
But, usual study does not evaluate the effect of sediment control by slit dam quantitatively.
Then, author studied about the effect of sediment control of slit dam by hydraulic experimentaltests, and made clear the such effect and some results mentioned as follows.
1) Blocking condition of a slit dam is shown as, b/dmax ≤1.5
2) Control effect in quantity of slit dams makes 1.2times of ordinary sabo dam in the boundarycondition of slit density, 0.2≤∑b/B≤0.6
3) Effect of slit dams which constructed continuousty 23 dams is not so effectual as a single.
4) Qualitative effect of slit dams is nearly equal to the effect of ordinary sabo dams.
As a result, effect of sediment control by slit dam makes a conclusion as follows
It is a useful effect that slit dam makes possible to flow down the sediment at ordinary time andto check the sediment at the big flood.
