Length-thickness and length-width of debouch bar both are log-log type linearity .河口壩的長度與厚度及長度與寬度均呈雙對數線性關系;
2 . 河口砂壩
from serious to weak , the microfacies are in turn distributary interchannel , levee , far distributary river course and debouch bar .按照非均質性的強弱,這些微相依次為分流間灣、天然堤、遠砂壩、水下分流河道和河口砂壩。