flood-frequency relationship

例句：

1. 1. The flood-frequency relationship betweenrainfall and floods is a complex one.
   降雨与洪水之间的洪水频率关系是一个复杂的问题。
2. 2. This study aims to understand the flood-frequency relationship in urban areas.
   这项研究旨在理解城市地区的洪水频率关系。
3. 3. The flood-frequency relationship is influenced by many factors, including climate change.
   洪水频率关系受到许多因素的影响，包括气候变化。