Engineers build huge storm pipes or sewers to carry the storm water away, but these cause another problem.

工程师们建造了巨大的雨水管或下水道来把暴雨雨水排出去，但是这些设施会引起另一个问题。

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Like many cities, Greenwich has created a geographic information system - a map that shows all the hidden bones and arteries of modern civilization: water mains, storm sewers, utility lines.

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Dawn Harrington, project manager, said the work will allow sewers to hold more storm water and would help protect the environment.

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