Study on moisture and wind maximization for probable maximum precipitation estimation
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Abstract:
Generally, moisture and efficiency factor maximization or moisture and wind maximization are two approaches used to estimate the probable maximum precipitation (PMP) in China. But only the value obtained from the moisture and efficiency factor maximization is used as the PMP estimation in most cases, because the moisture and wind maximization approach regularly overestimates and therefore is usually taken as reference only. This paper presents a modified moisture and wind maximization method based on the “Wind Rose Diagram” applied in port engineering. First, measured wind speed and direction data are grouped according to the direction of prevailing wind in the studied area. Then, the high-efficiency storm in each group of wind direction is maximized. Finally, the maximum value among all groups is chosen to be the final result of moisture and wind maximization, that is PMP value. The new approach was tested on the Xianning nuclear power plant in Hubei Province, and generated a more reasonable PMP value compared with the traditional approaches.
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