In order to study the applicability of flood channel connecting with the spillway to the check dams under the high siltation state,the model experiments combined with numerical simulations were used to study the influence of the a-bove forms on reducing erosion and flood discharge for check dams.The results show that under this connection mode,the overall flow pattern over the field and spillway is stable.There is a turbulent flow pattern only in front of the inlet of the spillway;The layout of flood channels reduces the runoff velocity over the field,which can effectively suppress the soil erosion caused by floods;When the upstream flow is low,the discharge coefficient of the spillway is less than the de-sign value.But with the increase of flow,the overflow capacity of check dams will be enhanced and meet the overflow re-quirements.These conclusions provide a reference for the relevant work of check dam reinforcement.
维普
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