Chala Hailu Sime

• Master of Science
• Assistant Professor at Jimma University Institute of Technology

The CMIP6 model incorporates various socio-economic and technological development scenarios and provides a comprehensive assessment of climate change. It differs from earlier versions of climate models in terms of the number of modeling groups, future scenarios evaluated, and experiments performed. Selecting a suitable subset of CMIP6 models poses...

The Nashe River watershed in Ethiopia is experiencing increased water demand due to the growing socioeconomic activities. As a result, the study aimed to assess the surface water potential and allocate water demands in the Nashe watershed, Ethiopia, by utilizing the water evaluation and planning model. The model was calibrated using observed and si...

Examining the spatiotemporal dynamics of meteorological variables in the context of changing climate, particularly in countries where rainfed agriculture, and hydropower project are predominant, is vital to assess climate-induced change. CORDEX Africa has been developed to forecast Africa's climate variation and variabilities. the RCA4 regional cli...

Surface water is prone to pollution from diverse pollutants and necessitates treatment processes before it can be safely utilized as drinking water. Its treatment involves the use of various synthetic compounds, both organic and inorganic in nature. However, using organic and inorganic compounds is prohibitively expensive for rural area communities...

Rising global temperatures and shifting precipitation patterns have significant socio-economic consequences if not properly studied and predicted. Regional climate models (RCMs) are utilized to assess local-scale climate change. However, the reliability of individual models must be validated due to inherent limitations and methodological constraint...

Extreme rainfall and its accompanying hydrological extremes are happening more frequently as a result of global warming's alteration of regional and local weather patterns. This poses a serious risk to ecosystem, environment and the community livelihoods. The Awash basin in Ethiopia is especially vulnerable to these events, posing significant threa...

Water is essential for daily activities and maintaining human well-being. However, in many less-developed countries, including Ethiopia, the lack of a well-developed wastewater treatment system leads to contaminated surface water. This poses significant risks to human health. To address this problem, wastewater can be treated using locally availabl...

Sediment movement is the most critical problem in Ethiopia, notably in the Ketar River watershed, which is located in the Rift Valley Basin. The Ketar River flows through rugged terrain with steep slopes and high sediment movement. The purpose of the study is to evaluate the Soil and Water Assessment Tool's (SWAT) ability to simulate sediment and t...

Hydrological measurements are vital for Water Resources Planning and Management. Modeling rainfall-runoff may be used to understand the impact of future hydrological changes such as flooding, soil loss, and sedimentation effect on lakes and reservoirs for irrigation and hydropower. But the difficult one is the selection of the best models. All hydr...

Probable maximum precipitation (PMP) is ideally the maximum precipitation depth for a given duration at a definite geographical location at a particular time in a year. The PMP is used as an input in the design of hydraulic structures. This study pointed to predict the PMP using the daily maximum rainfall recorded for 34 years (1986–2019) in Dedess...

Sediment movement is the most critical problem in Ethiopia, notably in the Ketar river watershed, which is located in the Rift Valley Basin. The Ketar River flows through rugged terrain with steep slopes and high sediment movement. The purpose of this research is to check Soil and Water Assessment Tool (SWAT) in simulating sediment yield and to ide...

Climate change and its impacts continue and become a major challenge if proper mitigation measures are not taken. This study aimed to analyze and predict the impact of climate change on crop yield under two Representative Concentration Pathways (RCPs), high (RCP8.5) and medium (RCP4.5) emission global warming scenarios of rainfall and temperature d...

SWAT and HEC-HMS models are widely used hydrological models for runoff simulation. The performance of these models varies based on spatial and hydro-metrological characteristics of the watershed; These models are not applied on Toba watershed for daily runoff simulation. Therefore, the ultimate objective of this research is to check the performance...

Streamflow modeling is essential in developing long-term water resource management plans. Especially in the inaccessible area like Toba sub-watershed, Ethiopia, modeling is an alternative means of obtaining streamflow data. Knowing of the hydrological response of a watershed would help to resolve potential water resources problems associated with f...

This study analyzed the performance of four (REgional MOdel (REMO2009), High-Resolution Hamburg Climate Model 5 (HIRAM5), Climate Limited-Area Modeling Community (CCLM4-8) and Rossby Centre Regional Atmospheric Model (RCA4)) Regional Climate Models (RCMs) simulations from Coordinated Regional Climate Downscaling Experiment (CORDEX) Africa program....

Surface runoff is a critical input in watershed management. Runoff is a driving force for soil erosion which causes sedimentation of reservoirs located at downstream of watersheds. The present study aimed to model surface runoff using the Soil and Water Assessment Tools (SWAT) model in Ketar watershed, Ethiopia. Ketar river crosses mountainous stee...