不透水面的增加，地表降雨-径流关系也随之发生改变。
Acompanied with the impervious surface increase, rainfall and run-off also changed.
城市化进程的加快，诸如不透水面积的加大，人类干涉自然水系等，已经引起许多城市排水问题。
The progress of urbanization speeding up, factors such as expanding staunch area staunch area, mankind affection on nature water system, etc, have caused many urban drainage problems.
城市化进程的加快，诸如不透水面积的加大，人类干涉自然水系等，已经引起许多城市排水问题。
The progress of urbanization speeding up, factors such as expanding staunch area staunch area, mankind affection on nature water system, etc, have caused many urban drainage problems.
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