Ogbozige F. Development of Intensity-Duration-Frequency (IDF) Models for Manually Operated Rain Gauge Catchment: A Case Study of Port Harcourt Metropolis Using 50 Years Rainfall Data . TJET [Internet]. 2022Feb.20 [cited 2024Nov.22];40(2):33-44. Available from: https://tjet.udsm.ac.tz/index.php/tjet/article/view/731