APPLICATION OF GIS TECHNIQUES IN GENERATING RAINFALL-IDF MAPS FOR UNGAUGED CATCHMENT: A CASE OF YENAGOA CITY, NIGERIA

Authors
  • Ogbozige, F.J.

    Federal University Otuoke, Nigeria

Keywords:
IDF, IDW, these are not keywords, nterpolation, Ungauged, Yenagoa 
Abstract

Certain areas in Yenagoa city, the capital of Bayelsa state in Southern Nigeria have been experiencing flooding whenever rainfall occurs despite the presence of surface drainages. Past literatures attributed the cause to many factors with emphasis on negligence of hydrologic analysis during drainage design. The Rainfall-Intensity-Duration-Frequency (IDF) curve or model is a well-known hydrologic tool used in the design of surface drainages and culverts. However, Yenagoa city has no existing IDF model due to lack of sufficient rainfall data since a functional meteorological station had not been installed in the state. Hence, this research employed Geographic Information System (GIS) to establish the rainfall IDF map model of the ungauged Yenagoa city via Inverse Distance Weighted (IDW) Interpolation technique, for 2, 5, 10, 25 and 50years return periods. Thereafter, a mathematical relationship was developed to determine any desired value of IDF parameters for the catchment once other parameters are known.

 

Author Biography
  1. Ogbozige, F.J., Federal University Otuoke, Nigeria

    Department of Civil Engineering

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2023-05-31
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How to Cite

APPLICATION OF GIS TECHNIQUES IN GENERATING RAINFALL-IDF MAPS FOR UNGAUGED CATCHMENT: A CASE OF YENAGOA CITY, NIGERIA. (2023). FUTA JOURNAL OF ENGINEERING AND ENGINEERING TECHNOLOGY, 17(2), 32-41. https://doi.org/10.51459/futajeet.2023.17.2.576

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