hydrologic frequency analysis

例句：

1. 1. The hydrologic frequencyanalysis is crucial for predicting floods.
   水文频率分析对于预测洪水至关重要。
2. 2.This study aims to improve the accuracy ofhydrologic frequency analysis.
   这项研究旨在提高水文频率分析的准确性。
3. 3. Thehydrologic frequency analysis helpsus understand the impact of climatechange on river flow.
   水文频率分析帮助我们理解气候变化对河流流量的影响。