洪水等级和灾情划分问题

THE CLASSIFICATION OF FLOOD GRADE AND DISASTER DEGREE

洪水等级是描述一次洪水大小的指标，而洪水灾度是描述一次洪水造成损失大小的指标。这两个指标从理论和应用方面来说都具有许多优点，概念明确，简单易行。

In this paper,flood grade and flood disaster degree are suggested for describing flood magnitude and loss magnitude caused by flood,respectively.The concepts are explicit and the application is easy.