Improvement Engineering on Combined Sewerage System in Old Urban Area of Zhuji

By considering the topographic features,pollution source characteristics,drainage capacity,road status,construction condition and capital expenditure etc.,a thorough analysis of the present conditions of old drainage pipe-works which is a combined sewerage system spreading in three different districts located at the center of Zhuji City,was conducted and multi-measures for improving old drainage system was adopted.Result shows that the implementation effect is satisfactory.