PREVENTING AND CONTROLLING METHOD FOR MAIN RIVER TRANSPORT CONTROLLING DEBRIS FLOW

摘要

A preventing and controlling method for main river transport controlling debris flow includes: first, according to the transport ability of the main river, a drainage project is used to prevent and control the debris flow. Then, based on the drainage project, if any debris flow matters can't be transported to the lower reach by the main river, a drainage project and a block project will be used at the same time to prevent and control the debris flow. Furthermore, based on the drainage project and the block project, if any debris flow matters still can't be consumed completely, a drainage project, a block project and a deposit project will be combined together to prevent and control the debris flow. Dredge is considered as a primary means in the method. The transport ability of the main river is used sufficiently and debris flow matters are distributed reasonably along the path. A preventing and controlling system is then arranged reasonably. Safe drainage of debris flow can be achieved and barrier lake, a secondary disaster, formed by blocking the main river which is caused by draining debris flow overly can be avoided by the method. The safety of towns in mountain areas, important projects and infrastructures positioned at the debris flow gully mouth can be ensured.