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The paper describes the theoretical approach to the relation of differenttype of debris flow depth and the curvature radius of discharge quide ditch and the expressions for estimating water surface freeboard, with the consideration of the debris flowcharacteristics with rational structure. For engineering applications, the relevant formulaehave been simplified, then verified by measured data. The result indicates the good coincidence of estimated values with measured data.
The paper describes the theoretical approach to the relation of differenttype of debris flow depth and the curvature radius of discharge quide ditch and the expressions for estimating water surface freeboard, with the consideration of the debris flowcharacteristics with rational structure. For engineering applications, the relevant formulaehave was simplified, then verified by measured data. The result indicates the good coincidence of estimated values with measured data.