Probability Distribution of Summer Daily Precipitation in the Huaihe Basin of China

摘要

@@ 1. Introduction Huaihe basin is located in eastem part of China which is between the Yellow River and Yangtze River, composing the Huaihe river, Yihe river, Shuhe river and Sihe river, and its watershed area is about 270,000 square kilometers. As the weather and the changes of climate are complex in the basin, both the drought and flood disasters happened frequently here. As a result, it caused serious damages not only to people's lives, property but also to the sustainable development. The precipitation from June to August is about 53% of the annual precipitation (Cheng, 2004). Therefore, the precipitation from June to August is the main factor to determine whether drought or flood will occur and also the level of flood.