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Dr. Wagari M.に依頼
Ethiopia

PhD Hydrogeologist | Groundwater Modeling, GIS & Hydrogeochemistry Consultant | other Academia/education

プロフィール概要
専門分野
サービス
Writing Medical Writing, Technical Writing, Copywriting, Creative Writing
Research User Research, Feasibility Study, Fact Checking, Gap Analysis, Scientific and Technical Research, Systematic Literature Review
Data & AI Predictive Modeling, Statistical Analysis
職務経験

Lecturer

Jimma University

- 現在

Jimma University

- 現在

Lecturing and Researcher

Jimma University

8月 2015 - 現在

学歴

M.Sc. in Environmental Engineering (Envirinmental Engineering)

Jimma University

- 現在

Ph.D

Jimma university

2月 2025 - 現在

Bachelors

Jimma university

8月 2015 - 現在

認定資格

  • PhD Degree

    Ghent University, Belgium

    2月 2025 - 現在

出版物
JOURNAL ARTICLE
Wagari Mosisa Kitessa, Lelisa Regea Mengistu, Firomsa Bidira (2026). A stochastic framework for reliability assessment of a novel biomineral coagulant in hospital wastewater treatment . Water Practice & Technology.
Kebede, Adisu Befekadu, Tufa, Fayera Gudu, Kitessa, Wagari Mosisa, Gudeta, Beekan Gurmessa, Debela, Seifu Kebede, Yenehun, Alemu, Feyessa, Fekadu Fufa, Hermans, Thomas, Walraevens, Kristine(2025). Estimation of Groundwater Recharge in the Volcanic Aquifers in a Tropical Climate, Southwestern Ethiopia: Insights from Water Table Fluctuation and Chloride Mass Balance Methods . Water. 17. (21).
Wagari Mosisa Kitessa, Adisu Befekadu Kebede, Fayera Gudu Tufa, Beekan Gurmessa Gudeta, Alemu Yenehun, Bekan Chelkeba, Seifu Kebede Debela, Fekadu Fufa Feyessa, Kristine Walraevens (2024). Hydrogeochemical Characterization and Processes Controlling Groundwater Chemistry of Complex Volcanic Rock of Jimma Area, Ethiopia . Water.
Wagari Mosisa Kitessa, Adisu Befekadu Kebede, Fayera Gudu Tufa, Beekan Gurmessa Gudeta, Alemu Yenehun, Bekan Chelkeba, Seifu Kebede Debela, Fekadu Fufa Feyessa, Kristine Walraevens (2024). Hydrogeochemical Characterization and Processes Controlling Groundwater Chemistry of Complex Volcanic Rock of Jimma Area, Ethiopia . Water.
Fayera Gudu Tufa, Fekadu Fufa Feyissa, Adisu Befekadu Kebede, Beekan Gurmessa Gudeta, Wagari Mosisa Kitessa, Seifu Kebede Debela, Bekan Chelkeba Tumsa, Alemu Yenehun, Marc Van Camp, Kristine Walraevens (2024). Estimation of Groundwater Recharge in a Volcanic Aquifer System Using Soil Moisture Balance and Baseflow Separation Methods: The Case of Gilgel Gibe Catchment, Ethiopia . Hydrology.
Fayera Gudu Tufa, Fekadu Fufa Feyissa, Adisu Befekadu Kebede, Beekan Gurmessa Gudeta, Wagari Mosisa Kitessa, Seifu Kebede Debela, Bekan Chelkeba Tumsa, Alemu Yenehun, Marc Van Camp, Kristine Walraevens (2024). Estimation of Groundwater Recharge in a Volcanic Aquifer System Using Soil Moisture Balance and Baseflow Separation Methods: The Case of Gilgel Gibe Catchment, Ethiopia . Hydrology.
Hydrogeochemical Characterization and Processes Controlling Groundwater Chemistry of Complex Volcanic Rock of Jimma Area, Ethiopia @article{01JE61G4J0ZN9K622ZF785763C, abstract = {{<jats:p>The sustainable management of groundwater in the Jimma area is complicated by a lack of comprehensive studies on its chemical makeup and the geochemical processes influencing its hydrochemistry. This research aims to fill that gap by examining 51 groundwater samples from various sources, including deep groundwaters, shallow groundwaters, hand-dug well groundwaters, surface waters, and springs within the area primarily consisting of complex volcanic rocks. The goal is to describe the hydrogeochemical characteristics and determine the key processes affecting groundwater composition in this volcanic area. The study identifies clear patterns in cation and anion concentrations. For deep groundwaters, the average cation concentration is ranked as Na+ &gt; Ca2+ &gt; Mg2+ &gt; K+, while shallow groundwaters, hand-dug well groundwaters, surface waters, and springs show a ranking of Ca2+ &gt; Na+ &gt; Mg2+ &gt; K+. The major anions are typically ordered as HCO3− &gt; NO3− &gt; Cl− &gt; SO42−. The quantitative hydrogeochemical analysis indicates that the freshwater types in the region are primarily Ca-HCO3 and Ca-Mg-HCO3, with some highly mineralized Na-HCO₃ waters also detected. The weathering of silicate minerals mainly drives the geochemical processes affecting groundwater chemistry. An increase in mineralization, suggested by saturation indices, points to a longer residence time underground, with deep groundwaters exhibiting the highest saturation levels and springs the lowest. This mineralization is especially significant for Mg-silicates and carbonates. Stability diagrams for feldspar minerals further demonstrate groundwater evolution along flow paths, revealing that shallow systems are in equilibrium with minerals like gibbsite, whereas deeper systems achieve stability with albite, Ca-montmorillonite, and microcline. Higher CO2 levels (10−1.5 to 100.5 atm), likely from mantle-magma degassing, add more HCO3− to the deeper aquifers. This study offers the first thorough characterization of the groundwater composition in the Jimma area and provides important insights into the Jimma area’s hydrogeochemical development, establishing a basis for enhanced groundwater management within this intricate volcanic aquifer system.</jats:p>}}, author = {{Kitessa, Wagari Mosisa and Kebede, Adisu Befekadu and Tufa, Fayera Gudu and Gudeta, Beekan Gurmessa and Beyene, Alemu Yenehun and Tumsa, Bekan Chelkeba and Debela, Seifu Kebede and Feyessa, Fekadu Fufa and Walraevens, Kristine}}, issn = {{2073-4441}}, journal = {{Water}}, language = {{eng}}, number = {{23}}, publisher = {{MDPI AG}}, title = {{Hydrogeochemical Characterization and Processes Controlling Groundwater Chemistry of Complex Volcanic Rock of Jimma Area, Ethiopia}}, url = {{http://doi.org/10.3390/w16233470}}, volume = {{16}}, year = {{2024}}, } . Water.
Estimation of groundwater recharge in a volcanic aquifer system using soil moisture balance and baseflow separation methods : the case of Gilgel Gibe catchment, Ethiopia @article{01J5CYYMX463SX75QXTZMTYZ1X, abstract = {{Understanding the recharge-discharge system of a catchment is key to the efficient use and effective management of groundwater resources. The present study focused on the estimation of groundwater recharge using Soil Moisture Balance (SMB) and Baseflow Separation (BFS) methods in the Gilgel Gibe catchment where water demand for irrigation, domestic, and industrial purposes is dramatically increasing. The demand for groundwater and the existing ambitious plans to respond to this demand will put a strain on the groundwater resource in the catchment unless prompt intervention is undertaken to ensure its sustainability. Ground-based hydrometeorological 36-years data (1985 to 2020) from 17 stations and satellite products from CHIRPS and NASA/POWER were used for the SMB method. Six BFS methods were applied through the Web-based Hydrograph Analysis Tool (WHAT), SepHydro, BFLOW, and Automated Computer Programming (PART) to sub-catchments and the main catchment to estimate the groundwater recharge. The streamflow data (discharge) obtained from the Ministry of Water and Energy were the main input data for the BFS methods. The average annual recharge of groundwater was estimated to be 313 mm using SMB for the years 1985 to 2020 and 314 mm using BFS for the years 1986 to 2003. The results from the SMB method revealed geographical heterogeneity in annual groundwater recharge, varying from 209 to 442 mm. Significant spatial variation is also observed in the estimated annual groundwater recharge using the BFS methods, which varies from 181 to 411 mm for sub-catchments. Hydrogeological conditions of the catchment were observed, and the yielding capacity of existing wells was assessed to evaluate the validity of the results. The recharge values estimated using SMB and BFS methods are comparable and hydrologically reasonable. The findings remarkably provide insightful information for decision-makers to develop effective groundwater management strategies and to prioritize the sub-catchments for immediate intervention to ensure the sustainability of groundwater.}}, articleno = {{109}}, author = {{Tufa, Fayera Gudu and Feyissa, Fekadu Fufa and Kebede, Adisu Befekadu and Gudeta, Beekan Gurmessa and Kitessa, Wagari Mosisa and Debela, Seifu Kebede and Tumsa, Bekan Chelkeba and Beyene, Alemu Yenehun and Van Camp, Marc and Walraevens, Kristine}}, issn = {{2306-5338}}, journal = {{HYDROLOGY}}, keywords = {{groundwater recharge,catchment hydrology,soil moisture balance,baseflow separation,sustainability assessment,WATER-BALANCE,AUTOMATED TECHNIQUES,FLOW,MODEL,BASIN}}, language = {{eng}}, number = {{7}}, pages = {{109:1--109:28}}, title = {{Estimation of groundwater recharge in a volcanic aquifer system using soil moisture balance and baseflow separation methods : the case of Gilgel Gibe catchment, Ethiopia}}, url = {{http://doi.org/10.3390/hydrology11070109}}, volume = {{11}}, year = {{2024}}, } . HYDROLOGY.
Wagari Mosisa Kitessa, Fekadu Fufa, Didha Abera, Jo&#227;o Claudio Thomeo (2022). Biogas Production and Biofertilizer Estimation from Anaerobic Co‐Digestion of Blends of Wastewater and Microalgae . International Journal of Chemical Engineering.
Beekan Gurmessa Gudeta, Fekadu Fufa Feyessa, Wagari Mosisa Kitesa(2021). Household Generated Solid Waste Collection System Management Using Arcgis: a Case of Jimma Town, Southwestern Ethiopia . The Journal of Solid Waste Technology and Management. 47. (2). Microsoft.AspNetCore.Mvc.Localization.LocalizedHtmlString 317--323. Journal of Solid Waste Technology and Management
CONFERENCE POSTER
Groundwater flow system and hydrochemical changes: Insights from flow path analysis; the case of Jimma area, Ethiopia @inproceedings{01JE61PYW5YREJKYJW6BWEMRHW, abstract = {{The groundwater flow system in the Jimma area is not well understood and has not been subject to research. The paucity of knowledge of the system has an impact on groundwater management. This study aims to understand the groundwater flow system in the Jimma area by utilizing hand-dug wells for water-level monitoring, and spring discharge monitoring with response to rainfall. In addition, topographical, lithological, and hydrogeochemical data were utilized to study the groundwater system. Results indicate that shallow groundwater table fluctuations are influenced by local recharge from summer rainfall (June-August) and water extraction. Hydrographs from hand- dug wells show groundwater levels rising to a maximum during the rainy season, with fluctuations directly re- sponding to precipitation. These wells are situated at various topographic elevations and lithological types (highly weathered basalt and ignimbrite, sand, and alluvial deposits). Most groundwater levels in monitoring wells exhibit a seasonal fluctuation pattern, increasing during the wet season. Conversely, a deep well monitored using a diver shows minimal fluctuations and responds less due to the confined nature of its aquifer. The constructed piezomet- ric map indicates water levels follow surface topography and groundwater flow is towards lowlands areas in the southerly direction. Based on the insights of topography, lithology, the piezometric map, and hydrogeochemical data, a conceptual groundwater flow model was developed. Based on these findings, the groundwater flow system in the Jimma area is classified into local, intermediate, and deep (regional) flow systems. These results could be used as a basic reference for groundwater management in the Jimma area, allowing the evaluation of further evolutions in the future.}}, author = {{Kitessa, Wagari Mosisa and Feyessa, Fekadu Fufa and Walraevens, Kristine}}, language = {{und}}, location = {{9000 gent}}, title = {{Groundwater flow system and hydrochemical changes: Insights from flow path analysis; the case of Jimma area, Ethiopia}}, url = {{https://www.africaplatform.ugent.be/sites/default/files/GAPSYM17%20-%20Abstract%20Book_0.pdf}}, year = {{2024}}, } .
Groundwater hydrochemical characterization: A case of Jimma area, Oromiya, Ethiopia @inproceedings{01JD3A5WHG2EG5CMY1Q379GG9W, abstract = {{Understanding groundwater chemistry and its processes in the Jimma area volcanic rock is crucial, as no single studies have previously. Aluminosilicate feldspars weathering is dominant in governing the groundwater chemistry of the area. This weathering process releases Ca2+ into the groundwater and is supported by elevated alkalinity levels. The Na+ ion levels in groundwater are also influenced by silicate mineral weathering and potentially by evapo-concentration. The deviation of the Na+/Cl- ratio from the 1:1 halite dissolution signature suggests additional Na+ sources, likely from alkali feldspar weathering, without a proportional Cl- increase. The scatter plots between Cl- and SO42-, Cl- and NO3- indicate that anthropogenic and agricultural activities are governing these anions. Minerals like anhydrite, chrysotile, and sepiolite are undersaturated, suggesting ongoing dissolution, while the oversaturation of aragonite, calcite, dolomite, chalcedony, and quartz implies potential precipitation. In other words, this evidence suggests that calcite, dolomite, and gypsum are not the causes of the groundwater composition in the area. Additionally, the saturation indices of quartz and chalcedony show oversaturation (precipitation). These geochemical patterns reflect the complex interplay of mineral dissolution and precipitation in governing groundwater composition in the area. The area exhibits elevated CO2 levels ranging from 10-1.5 to 100.5 atm. This may be due to the thermal metamorphism of carbonate rock or mantlemagma degassing and volcanic activity in the deeper aquifer of the area. These processes allow the entry of volcanic CO2 into the aquifer system, next to biogenic CO2 from the soil, leading to increased HCO3- concentrations. Thus, there are diverse CO2 contributions in the Jimma area. In general, alkali feldspar weathering, evapo-concentration, and anthropogenic activities are governing the groundwater geochemical processes of the Jimma area. Key Words: Alkali feldspars; Carbondioxide source; Hydrogeochemical; Saturation index}}, author = {{Kitessa, Wagari Mosisa and [missing], Fekadu Fufa and Walraevens, Kristine}}, booktitle = {{WorldGroundwater Congress IAH2024DAVOS Switerland}}, language = {{eng}}, location = {{DAVOS, SWITZRLAND}}, publisher = {{IAH}}, title = {{Groundwater hydrochemical characterization: A case of Jimma area, Oromiya, Ethiopia}}, year = {{2024}}, } .
Aquifer structure and hydraulic parameters assessment of Jimma area, Ethiopia @inproceedings{01HNWQZ2EQFZ8H9B8WF5R893D1, abstract = {{Jimma area is found in the Oromia regional state of Ethiopia, and is covered by tertiary volcanic rocks. The area is a fast-expanding capital city, which requires a significant water resources potential for water supply. However, still limited studies have been conducted concerning the groundwater potential and its characteristics. The objective of this study is to assess hydraulic parameters and the identification of the structure of the volcanic aquifer system of the Jimma area. In this study, primary and secondary data were used to study the aquifer of the area. Primary data are the collected borehole water levels. While secondary data were used to identify the aquifer structure and hydraulic parameters. Thus, the transmissivity of the aqui- fer rocks was estimated with the pumping test method using analytical solutions of Theis and Cooper-Jacob for confined aquifers, Neuman for unconfined aquifer systems, and Hantush and Jacob for leaky aquifers. In the study area, hydro-geologically three aquifer types are identified: basaltic; quaternary alluvial deposits; and pyroclastic aquifer system. The pumping test and lithologic borehole log data confirm that the aquifer system is dominantly confined. Leaky and unconfined aquifers were also identified. Detailed investigation of the litho- logic borehole data shows that this volcanic aquifer system is a multi-layer aquifer system. The transmissivity T was found to range between 0.25 m2/d and 139 m2/d, while the specific capacity Q/s was estimated to range between 0.71 m2/d and 158 m2/d. The borehole yield and the calculated transmissivity values indicate that this aquifer system is strongly heterogeneous. With each borehole’s specific capacity, the empirical relationship of transmissivity and specific capacity among aquifer parameters is T = 0.88(Q/s)0.98 with a correlation coefficient of 0.88. These results could be used as a reference for further investigation for any study of groundwater in the Jimma area.}}, author = {{Kitessa, Wagari Mosisa and Feyessa, Fekadu Fufa and Abera, Fenta Nigate and Beyene, Alemu Yenehun and Walraevens, Kristine}}, booktitle = {{Green Transition & Biodiversity, Multidisciplinary Workshop, Abstracts}}, keywords = {{Aquifer Characterization,Jimma Area,Pumping Test,Volcanic Aquifer System.}}, language = {{eng}}, location = {{Brussels, Belgium}}, pages = {{33--33}}, title = {{Aquifer structure and hydraulic parameters assessment of Jimma area, Ethiopia}}, year = {{2023}}, } .
CONFERENCE PAPER
Wagari Mosisa Kitessa, Fekadu Fufa, Fenta Nigate, Alemu Yenehun, Kristine Walraevens (2023). Aquifer structure and hydraulic parameters assessment of Jimma area, Ethiopia .