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Title: Development of intensity duration frequency relationships for Port Blair, Andaman and Nicobar Islands, India
Authors: Tamrakar S.
Goel N.K.
Published in: Mausam
Abstract: Rainfall intensity duration frequency relationships are required for planning and design of water resources projects and for assessing the risk of floods caused by heavy rainfall. In the present study rainfall Intensity Duration Frequency (IDF) relationships for Port Blair, Andaman and Nicobar Islands, India have been developed utilizing hourly rainfall data of self-recording rain gauge from 1969-2000 at Port Blair. As a first step, annual maximum series of rainfall depths of different durations were derived and detailed goodness of fit studies were conducted using Gumbel EV1, General Extreme Value, Generalized Logistic and Lognormal distributions with parameter estimation using probability weighted moments method. In general for most of the cases, Gumbel EV1 distribution was fitting well for the annual maximum rainfall series of different (i.e., 24) durations. Hence EV1 distribution was selected for deriving the generalized equation for rainfall intensity duration frequency relationship for Port Blair. This generalized equation is recommended to be used for design purpose. The relationships for estimation of rainfall intensities for smaller durations from 24 hour rainfall have also been established using optimization technique. © 2018, India Meteorological Department. All rights reserved.
Citation: Mausam (2018), 69(1): 123-132
Issue Date: 2018
Publisher: India Meteorological Department
Keywords: Rainfall intensity duration frequency (IDF) curves
Smaller duration rainfall intensity
ISSN: 2529416
Author Scopus IDs: 57200422924
Author Affiliations: Tamrakar, S., Indian Institute of Technology Roorkee, Roorkee, 247667, India
Goel, N.K., Indian Institute of Technology Roorkee, Roorkee, 247667, India
Funding Details: The part of the study was supported by Bharat Singh Chair for Water Resources, Ministry of Water Resources, Government of India. Department of Irrigation, Ministry of Irrigation, Government of Nepal sponsored the first u hor for pursu ng M s er’s degree t IIT Roorkee under ITEC Programme of Ministry of External Affairs, Government of India. The data for the study was provided by India Meteorological Department. The authors are thankful to all these organizations.
Appears in Collections:Journal Publications [HY]

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