Choose probability distribution to constructe IDF curve for calculation of rainwater drainage system in Hanoi area

Abstract

The article addresses the comparison and selection of theoretical distributions to build the IDF (intensity - duration - frequency) relationship curve in calculating the drainage system for Hanoi city. The International Hydrological Program (IHP) for the Asia-Pacific region of the UNESCO Permanent Agency headquartered in Jakarta, in 2005 recommended that member countries, including Vietnam, build IDF curve systems to promote sustainable infrastructure development were published in 2008. Accordingly, Vietnam should use Person III and Log-Person III distributions to construct IDF curves. However, up to now there have not been many studies on the comparison and selection of theoretical distributions. The article focuses on calculating the use of Person III and Log-Person III distributions to build the IDF curve for Hanoi city. Thereby, compare, analyze and make recommendations on the use of theoretical distribution for Hanoi area.

Keyword: Rainfall intensity; IDF; probability distribution; meteorological statistics; empirical distribution.