GIS-Based Prediction and Comparative Analysis of Potential Evapotranspiration using Selected Methods at Omi-Kampe Watershed, Nigeria

Authors

  • A. G. Adeogun Department of Civil Engineering, Kwara State University Malete, NIGERIA.
  • E. O. Adeyemi Department of Civil Engineering, University of Ilorin, Ilorin, NIGERIA
  • H. O. Ganiyu Department of Civil Engineering, Kwara State University Malete, Nigeria

Keywords:

Hydrological Models, Nigeria, Potential Evapotranspiration, Simulation, SWAT, Watershed

Abstract

The study predicted potential evapo-transpiration (PET) of Omi Kampe watershed upstream in Kogi State, Nigeria using Soil and Water Assessment Tool (SWAT) based on Priestley Taylor, Penman Monteith and Hargreaves methods. The model input data used were Digital Elevation Model, Soil map, Land use map and 30-year temporal weather data (January 1987- December 2016) for the simulation of the hydrological processes. The results showed that Penman Monteith and Hargreaves methods exhibited high correlation in the predicted values of PET while Priestley Taylor results for PET are least correlated with the other two methods and suspected to have under predicted PET values. On the other hand, all the three methods predicted the actual evapo-transpiration of the watershed with insignificant result variations. Outcome of this research could serve as a guide to water professionals and other stakeholders in selecting appropriate methods for evaluation of PET in the study area and sub region in Nigeria.

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Published

2022-04-26

How to Cite

Adeogun, A. G., Adeyemi, E. O., & Ganiyu, H. O. (2022). GIS-Based Prediction and Comparative Analysis of Potential Evapotranspiration using Selected Methods at Omi-Kampe Watershed, Nigeria. Nigerian Journal of Technology, 41(2), 396–407. Retrieved from https://nijotech.com/index.php/nijotech/article/view/2671

Issue

Vol. 41 No. 2 (2022): NIGERIAN JOURNAL OF TECHNOLOGY, VOL. 41 NO. 2, MARCH 2022

Section

Agricultural, Bioresources, Biomedical, Food, Environmental & Water Resources Engineering

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