ABSTRACT
In planning of arrangement of grid check dam structures, decision making of the space between steel pipes in consideration of change of characteristic of sediment rocks is substantial because the characteristic of sediment rocks is used for design of grid check dam structures, and it change when it pass through the grid. This paper discusses an evaluation method of effect of grid shape on the probability of rocks capturing, and then an evaluation of effect of a series of grid check dam structures are shown. First, it is assumed that the capturing events are based on a probability process, i.e., a geometric distribution in a Bernoulli sequence. Second, the probability of that a rectangular space is stuffed by some rocks following log-normal distribution diameter is estimated using Monte-Carlo simulation.
