Minimum loss for parting flood is over 25 billion, which si easy to cause flood.
而分滞一次洪水最小损失达25亿元以上，易造成小水大灾。
2
For effective drainage therefore, the entire site should be located above flood level at a minimum of 3 m above the water table, preferably on a gently sloping area.
Accordingly, the accident of tailings dam break during flood season is studied by applying fault tree analysis that includes minimum cut sets, minimum path sets and structure importance.