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城市下水道堵塞有哪些主要原因?
发布时间:2012年10月16日 14:00    发布人:admin    来源:上海排水管理处

城市下水道堵塞的主要原因有:违章压占;城市污水中泥砂沉积造成淤塞;建筑工地含大量泥砂的废水排入管道;管道破裂造成泥砂流入;行道树树根伸入排水管道。

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