Development of hydrological tools using extreme rainfall events for Dhaka, Bangladesh

作者：Ahammed Faisal^*; Hewa Guna Alankarage

来源：Water International, 2012, 37(1): 43-52.

DOI：10.1080/02508060.2012.645191

• extreme values
• daily rainfall
• Gumbel distribution function
• scale factor
• return periods
• IDF curves

Annual daily maximum rainfall data for 57 years (1953 to 2009) in Dhaka, Bangladesh are analysed statistically to prepare two hydrological tools: (1) probable return periods of extreme rainfall events, and (2) intensity-duration-frequency (IDF) curves. Limited availability of short-duration rainfall data leads to difficulties in performing the task through traditional approaches; hence, the Gumbel distribution function and scaling theory have been applied in preparing the probable return periods of extreme rainfall events and IDF curves, respectively. The outcomes of this paper can be used in better designing hydraulic structures in Bangladesh.

• 出版日期2012