In order to reasonably use design storm hyetograph in uniform area, we need to select a regionalized representative hyetograph from alternatives in uniform area.

• 但限于雨量测站为点的分布，因此必须将雨型设计结果分类及区域化，并求得区域代表雨型，如此方能为未设站区域使用，亦能合理的应用于降雨迳流模式中。