When the riverbed is fine sand, when G is -2, -1.5, and -1, the pipeline is buried under the riverbed, and the entire bed surface will drop by about 1cm after scouring;
When the riverbed is fine sand, when G is -2, -1.5 and -1 respectively, the pipe is buried under the riverbed, and the overall surface of the bed is reduced by about 1cm after flushing;
When the bed is fine sand, when G is - 2, - 1.5 and - 1, the pipeline is buried under the riverbed, and the bed surface drops about 1cm after scouring;<br>