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World Journal of Engineering
Research and Technology

( An ISO 9001:2015 Certified International Journal )

An International Peer Reviewed Journal for Engineering Research and Technology

ISSN 2454-695X

Impact Factor : 5.924

ICV : 79.45

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Indexing

Abstract

AN INTEGRATED APPROACH TO THE DEVELOPMENT OF INTENSITY DURATION FREQUENCY CURVE FOR SOUTHERN CROSS RIVER CATCHMENT, NIGERIA

*Antigha R. E. E.

ABSTRACT

Intensity-Duration-Frequency (IDF) curve is one of the most commonly used tools in Water Resources Engineering projects. These curves are useful in the design of urban drainage works such as storm sewers, culverts and other hydraulic structures. There are two common frequency analysis techniques that can be used to develop the IDF curve from rainfall data of the region. These techniques are Gumbel Approach and Log Pearson Distribution (LPT). For this research work, the Gumbel Distribution technique was used. An equation for estimating rainfall intensity for the region was derived. Rainfall intensities obtained showed good agreement with results from previous studies on some parts of the study area. The parameters of the IDF equation and coefficient of correlation for different return periods (10, 15, 30, 60, 120, 180, 360 and 420mins) were calculated using regression analysis. The results obtained showed that in all the cases, the correlation coefficient was very high, indicating the goodness of fit of the formula to generate IDF curves in the region of interest.

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