Browsing by Author "Bogale, Tesfaye"

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    Critical Analyses of Public Relations Practices in Kotobe Metropolitan University
    (2020-06) Bogale, Tesfaye; Jemaneh, Agaredech (PhD)
    The fields of public relations have dramatically grown to build the relationships between an organization and its key publics through effective communication. The study is conducted to assess the practice and challenge of Public Relations inKotebe Metropolitan University. The research used mixed approaches which enable the researchers to use both qualitative and quantitate data and analysis. The main subject of the study was PR practitioners,students and department heads. The researcher used interview, FGD and questionnaire as data collecting tool from the above subjects. The findings of the study described that Public Relations practice in the study area is in a difficult condition.The directorate is not professionally and structurally organized, lack of skilled and professional human power The PR practitioners have not well understood and practiced the PR strategy. Even the PR tools have not been used properly only focused on leaflet and notice bored. The role of PRis misunderstood; it is considered stage facilitator and meeting organizer.Lack of attention from concerned bodies,lack of trust from stake holders,lack of PR strategic frame work and focused on routine works took the first line as challenges for the public relations practice. Therefore the researcher has recommended that PR department should be well organized and strengthens, the department should be headed by a public relations professional, PR department should have clear & defined roles, set clear and well defied strategic framework. Establish and maintain good relationship with domestic and international media so as to reach internal public as well as stakeholders. It is also recommended that PR department should be empowered through engaging in decision making.
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    Predicting Discharge at Ungauged Catchments Using Rainfall-Runoff Model (Case study: Omo-Gibe River Basin)
    (Addis Ababa University, 2011-07) Bogale, Tesfaye; Bayou, Chane (PhD)
    This paper deals with predicting discharge at ungauged catchments, the case of Omo-Gibe river basin, using the WATBAL conceptual lumped rainfall-runoff model. Parameters calibrated with the model are extrapolated from gauged catchments to ungauged catchments of similar physical characteristics with Regionalization technique. In the Omo-Gibe river basin, most of the catchments are ungauged. Hydro-meteorological data from twenty four metrological and twenty two hydrological gauging stations of the basin are used to calibrate and validate the model parameters. Sizes of gauged catchments whose data are used vary from about 40 to 3242 km . Key model parameters considered consist of sub-surface runoff coefficient (α), surface runoff coefficient (ε), and maximum water holding capacity of catchments (Smax). These parameters are calibrated using an automatic optimizing routine of the WATBAL model and through routine iteration; Smax is found to vary from 3403mm to 466mm, α from 64mm/day to 0.26mm/day and ε from 9.6 to 2.6. Some more model parameters, namely, direct runoff coefficient (β), subsurface runoff coefficient (γ), and base flow (Rb) are calibrated manually. The hydrograph characteristics of observed and simulated events are compared using various evaluation criteria consisting of Nash-Sutcliffe coefficient (NS) greater than 0.6, relative volume error (RVE) between -10 and 10%, and coefficient of determination (r 2 ) greater than 0.7. Among the catchments of the basin that are used in the modeling work, 73% fulfilled the criteria. Based on availability of required data, six physical catchment characteristics (PCCs) are selected among those commonly used in many regionalization studies. These are catchment area, mean annual precipitation, mean annual evapotranspiration, average catchment slope, longest flow path and mean catchment elevation. In addition to the PCCs, input data including precipitation, observed flow, temperature, relative humidity and sunshine are used in the WATBAL rainfall-runoff model. Four parameter 2 regionalization methods (multiple regression, spatial proximity, area ratio and sub-basin mean) were applied to transfer model parameter values from the gauged to the ungauged catchments.