香港島單車徑 相關
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搜尋結果
以洪水的洪峰流量或洪水总量重现期作为洪水等级划分标准，分为一般洪水、较大洪水、大洪水、特大洪水四个等级。. 山洪是洪水的一个类别。. 其形成因素主要有三个：地质地貌因素、气象水文因素、人类活动因素。. 山洪是发生在山区溪流中快速强大的地表 ...
