Trends in climatic and hydrological parameters in the Ajora-Woybo watershed, Omo-Gibe River basin, Ethiopia

Abstract The identification of hydro-meteorological trends is essential for analyzing climate change and river discharge at the watershed level. Ajora-Woybo in Ethiopia was studied long-term rainfall, temperature, annual, monthly, seasonal time scales. rainfall temperature data extend 1990 to 2020, whereas span from1990 2015. Pettitt Standard Normal Homogeneity Test (SNHT) tests were used determine homogeneity. Mann–Kendall Sen's slope tests, as well numerous variability measures, then employed trend analysis. degree relationship between variables determined using Pearson correlation coefficients (r). Inhomogeneity discovered annual from Angacha Areka stations. Rainfall showed insignificant over time, with increasing decreasing across Monthly observed be significantly falling February March. runoff increase just insignificantly during Kiremt season. On other hand, minimum, maximum, mean temperatures significant increases 0.01 °C, 0.04 0.025 respectively. In this study, relationships found moderate minimal, Generally, results examination hydrological parameters show that water resources vary throughout time. As a result, designing strategies require due attention. Article highlights Hydrological meteorological are resource Mann-Kendall along number utilized conjunction series analysis approach watershed's generally demonstrates how availability varies Designing suitable plans management sustainable development therefore essential.