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The drainage system has great influence on hidden danger of flood in city. The main reason for current flood is unsmooth drainage system. The main reason leading to the phenomenon is the blocking of sewer or drain hole of well lid. There is hidden danger of flood existing during the rainy season with great damage to urban environment, residents’ life and properties and so on; now the drain hole is designed as inclined to prevent leaves, solving the problem of sewer blockage efficiently with realistic significance as to solving potential risk of flood.
Southwest Jiaotong University