主要排水入海河道为黄沙港，另有部分洪水从射阳河下排入海。
The main drainage channel for yellow sand to the sea port, and some flooding from the Sheyang River into the sea.
在地中海区域的早期文明中，拱形结构主要被运用在地下排水管上，但在地上建筑中首先发展并广泛使用拱门的是罗马人。
The arch was used by the early cultures of the Mediterranean area chiefly for underground drains, but it was the Romans who first developed and used the arch extensively in aboveground structures.
水的污染源主要来自工业、农场以及排水系统。
The pollutants that affect water come mainly from industries, farm, and sewerage systems.
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