城市化地区的排水系统不仅包括由市政雨水管网构成的市政排水系统，还包括原属农田排涝范畴的区域排涝系统。
The drainage systems of urbanized area include the municipal drainage systems that consist of rain pipes and the hydrological drainage system that developed from the farm drainage system.
排水系统一直是市政服务的主要问题。
Drainage has always been the main problem among municipal services.
市政整体排水系统程序如下：路面雨水→雨水井→沉泥井→过街排水管→排水检查井→地下排水主干线。
The whole city drainage system program is as follows: rain water wells road, clay and drain well across the street and drainage inspection wells and underground drainage main lines.
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