Although wetlands occupy less than 6% of the earth’s land area, they contribute a lot for ecosyst... more Although wetlands occupy less than 6% of the earth’s land area, they contribute a lot for ecosystem services than their small area implies. This study aims to model the wetland degradation of Boyo Lake using Geospatial techniques. This study uses Landsat 7 ETM for the year 2000 and 2010 while Landsat 8 OLI used for 2020. The imageries were extracted and geometrically corrected using boundary polygon data using Spatial Analyst Tool in ArcGIS 10.8. Supervised classification was performed using the Maximum Likelihood Classifier. A comparison of land cover statistics assisted in identifying the trend and rate of change at wetland over time. In 2000, water and wetland covered an area of 2743.9 ha (53.3%) and 1680.3 ha (32.7%) of the area, respectively. The analysis shows that water and wetland coverage declined to 1922.9 ha (37.4%) and 1309.4 ha (25.4%) while farmland have increased to 1765.23 ha (34.3%) in 2010. Subsequently, area coverage by water and wetland further declined to 1579.1...
Urban expansion is widespread in most developing countries while the nearby farmland area coverag... more Urban expansion is widespread in most developing countries while the nearby farmland area coverage is shrinking which in turn attracting the attention of many actors to manage the encroachment scientifically. This study aims to analyze the urban land use and land cover change in Hossana town using geospatial techniques. Three Landsat images were used and analyzed using ArcMap 10.5. The images were classified and reclassified into six land use classes. The result showed visible land cover change and a high rate of town expansion in the study area. The forest area surrounding the town and bareland decreased from 5702 (48.8 %) to 1515 ha (12.97 %) and from 2224.3 ha (19.1%) to 226.2 ha (1.94 %) from 1986 to 2019 whereas farmland and built-up areas increased rapidly from 3078 ha (26.4%) to 5599.5 ha (47.95%) and from 141.1 (1.2%) to 3581.4 ha (30.67%) in the study period, respectively. Thus, the land cover change result for the built-up area has eventually expanded through the study per...
Soil degradation is a global challenge for agricultural productivity. To tackle this, the Ethiopi... more Soil degradation is a global challenge for agricultural productivity. To tackle this, the Ethiopian government and different NGOs launched soil management technologies in different parts of Ethiopia, including the Wera sub-watershed in Anlemo district, southern Ethiopia. This study was carried out to investigate the effect of soil management practices on soil properties at various landscape positions in the Wera sub-watershed. To achieve the intended objective, the 27 composite soil samples were collected from soil bund with desho grass, fanya-juu with desho grass and no management practices (control) with three replications at three landscape positions from 0 to 30 cm depth whereas, 27 undisturbed soil samples were collected for bulk density analysis. The collected soil samples were analyzed for soil texture, soil reaction, cation exchange capacity, organic carbon, total nitrogen, and available phosphorus. The result showed that soil bund with desho grass and fanya-juu with desho g...
Leishmaniasis is considered as one of the most Neglected Tropical Diseases (NTDs) in the world, c... more Leishmaniasis is considered as one of the most Neglected Tropical Diseases (NTDs) in the world, caused by protozoan parasites of the genus Leishmania. Leishmaniasis control profoundly depends upon chemotherapy which includes pentavalent antimonials, paromomycin, pentamidine, amphotericin B and miltefosine. Miltefosine is the only oral drug used for the treatment of Visceral Leishmaniasis with high cure rate but decrease in susceptibility is observed in countries like India where it is extensively used. Hence, there is an urgent need to develop novel antileishmanial agents with good potency and better therapeutic profile. Manzamines are unique group of b-carboline alkaloids isolated from marine sponges and exhibited potent antileishmanial activity. In the present study, we described antileishmanial activity, cytotoxicity and structure activity relationship of natural manzamine alkaloids.
Although the problem of soil erosion is common in all countries, it is one of the more persisting... more Although the problem of soil erosion is common in all countries, it is one of the more persisting hazards in developing countries like Ethiopia which is a country located in tropic where there is higher precipitation and is vulnerable to almost all forms of environmental degradation which is also resulted from poor resource conservation practices. The main objective of this study is to determine soil erodibility and susceptibility to soil erosion in Shonkola mountainous area, Soro district. To determine soil erodibility and susceptibility to soil erosion, the percentage of primary soil separates (silt, very fine sand, and clay); percentage of organic matter; soil structure classes; and soil permeability were estimated. Soil samples were collected from 56 locations at an average depth of 15 cm to employ soil texture nomograph. Thus, soil erodibility of Shonkola area is determined and mapped to envisage the area that is highly susceptible for soil erosion. The soil erodibility value r...
Although the problem of soil erosion is common in all countries, it is one of the more persisting... more Although the problem of soil erosion is common in all countries, it is one of the more persisting hazards in developing countries like Ethiopia which is a country located in tropic where there is higher precipitation and is vulnerable to almost all forms of environmental degradation which is also resulted from poor resource conservation practices. The main objective of this study is to determine soil erodibility and susceptibility to soil erosion in Shonkola mountainous area, Soro district. To determine soil erodibility and susceptibility to soil erosion, the percentage of primary soil separates (silt, very fine sand, and clay); percentage of organic matter; soil structure classes; and soil permeability were estimated. Soil samples were collected from 56 locations at an average depth of 15 cm to employ soil texture nomograph. Thus, soil erodibility of Shonkola area is determined and mapped to envisage the area that is highly susceptible for soil erosion. The soil erodibility value ranges from 0.01426 to 0.04001. It was found that the soil erodibility increases as organic content decreases, soil texture becomes finer and less permeable, and structure becomes poor. Prediction of soil erodibility and susceptibility to soil erosion is of great importance for soil erosion quantification, using GIS. The farm-unit level identification of soil types and existing specific problems are crucial in planning and implementation of any soil management strategies.
Although the problem of soil erosion is common in all countries, it is one of the more persisting... more Although the problem of soil erosion is common in all countries, it is one of the more persisting hazards in developing countries like Ethiopia which is a country located in tropic where there is higher precipitation and is vulnerable to almost all forms of environmental degradation which is also resulted from poor resource conservation practices. The main objective of this study is to determine soil erodibility and susceptibility to soil erosion in Shonkola mountainous area, Soro district. To determine soil erodibility and susceptibility to soil erosion, the percentage of primary soil separates (silt, very fine sand, and clay); percentage of organic matter; soil structure classes; and soil permeability were estimated. Soil samples were collected from 56 locations at an average depth of 15 cm to employ soil texture nomograph. Thus, soil erodibility of Shonkola area is determined and mapped to envisage the area that is highly susceptible for soil erosion. The soil erodibility value ranges from 0.01426 to 0.04001. It was found that the soil erodibility increases as organic content decreases, soil texture becomes finer and less permeable, and structure becomes poor. Prediction of soil erodibility and susceptibility to soil erosion is of great importance for soil erosion quantification, using GIS. The farm-unit level identification of soil types and existing specific problems are crucial in planning and implementation of any soil management strategies.
Although wetlands occupy less than 6% of the earth’s land area, they contribute a lot for ecosyst... more Although wetlands occupy less than 6% of the earth’s land area, they contribute a lot for ecosystem services than their small area implies. This study aims to model the wetland degradation of Boyo Lake using Geospatial techniques. This study uses Landsat 7 ETM for the year 2000 and 2010 while Landsat 8 OLI used for 2020. The imageries were extracted and geometrically corrected using boundary polygon data using Spatial Analyst Tool in ArcGIS 10.8. Supervised classification was performed using the Maximum Likelihood Classifier. A comparison of land cover statistics assisted in identifying the trend and rate of change at wetland over time. In 2000, water and wetland covered an area of 2743.9 ha (53.3%) and 1680.3 ha (32.7%) of the area, respectively. The analysis shows that water and wetland coverage declined to 1922.9 ha (37.4%) and 1309.4 ha (25.4%) while farmland have increased to 1765.23 ha (34.3%) in 2010. Subsequently, area coverage by water and wetland further declined to 1579.1...
Urban expansion is widespread in most developing countries while the nearby farmland area coverag... more Urban expansion is widespread in most developing countries while the nearby farmland area coverage is shrinking which in turn attracting the attention of many actors to manage the encroachment scientifically. This study aims to analyze the urban land use and land cover change in Hossana town using geospatial techniques. Three Landsat images were used and analyzed using ArcMap 10.5. The images were classified and reclassified into six land use classes. The result showed visible land cover change and a high rate of town expansion in the study area. The forest area surrounding the town and bareland decreased from 5702 (48.8 %) to 1515 ha (12.97 %) and from 2224.3 ha (19.1%) to 226.2 ha (1.94 %) from 1986 to 2019 whereas farmland and built-up areas increased rapidly from 3078 ha (26.4%) to 5599.5 ha (47.95%) and from 141.1 (1.2%) to 3581.4 ha (30.67%) in the study period, respectively. Thus, the land cover change result for the built-up area has eventually expanded through the study per...
Soil degradation is a global challenge for agricultural productivity. To tackle this, the Ethiopi... more Soil degradation is a global challenge for agricultural productivity. To tackle this, the Ethiopian government and different NGOs launched soil management technologies in different parts of Ethiopia, including the Wera sub-watershed in Anlemo district, southern Ethiopia. This study was carried out to investigate the effect of soil management practices on soil properties at various landscape positions in the Wera sub-watershed. To achieve the intended objective, the 27 composite soil samples were collected from soil bund with desho grass, fanya-juu with desho grass and no management practices (control) with three replications at three landscape positions from 0 to 30 cm depth whereas, 27 undisturbed soil samples were collected for bulk density analysis. The collected soil samples were analyzed for soil texture, soil reaction, cation exchange capacity, organic carbon, total nitrogen, and available phosphorus. The result showed that soil bund with desho grass and fanya-juu with desho g...
Leishmaniasis is considered as one of the most Neglected Tropical Diseases (NTDs) in the world, c... more Leishmaniasis is considered as one of the most Neglected Tropical Diseases (NTDs) in the world, caused by protozoan parasites of the genus Leishmania. Leishmaniasis control profoundly depends upon chemotherapy which includes pentavalent antimonials, paromomycin, pentamidine, amphotericin B and miltefosine. Miltefosine is the only oral drug used for the treatment of Visceral Leishmaniasis with high cure rate but decrease in susceptibility is observed in countries like India where it is extensively used. Hence, there is an urgent need to develop novel antileishmanial agents with good potency and better therapeutic profile. Manzamines are unique group of b-carboline alkaloids isolated from marine sponges and exhibited potent antileishmanial activity. In the present study, we described antileishmanial activity, cytotoxicity and structure activity relationship of natural manzamine alkaloids.
Although the problem of soil erosion is common in all countries, it is one of the more persisting... more Although the problem of soil erosion is common in all countries, it is one of the more persisting hazards in developing countries like Ethiopia which is a country located in tropic where there is higher precipitation and is vulnerable to almost all forms of environmental degradation which is also resulted from poor resource conservation practices. The main objective of this study is to determine soil erodibility and susceptibility to soil erosion in Shonkola mountainous area, Soro district. To determine soil erodibility and susceptibility to soil erosion, the percentage of primary soil separates (silt, very fine sand, and clay); percentage of organic matter; soil structure classes; and soil permeability were estimated. Soil samples were collected from 56 locations at an average depth of 15 cm to employ soil texture nomograph. Thus, soil erodibility of Shonkola area is determined and mapped to envisage the area that is highly susceptible for soil erosion. The soil erodibility value r...
Although the problem of soil erosion is common in all countries, it is one of the more persisting... more Although the problem of soil erosion is common in all countries, it is one of the more persisting hazards in developing countries like Ethiopia which is a country located in tropic where there is higher precipitation and is vulnerable to almost all forms of environmental degradation which is also resulted from poor resource conservation practices. The main objective of this study is to determine soil erodibility and susceptibility to soil erosion in Shonkola mountainous area, Soro district. To determine soil erodibility and susceptibility to soil erosion, the percentage of primary soil separates (silt, very fine sand, and clay); percentage of organic matter; soil structure classes; and soil permeability were estimated. Soil samples were collected from 56 locations at an average depth of 15 cm to employ soil texture nomograph. Thus, soil erodibility of Shonkola area is determined and mapped to envisage the area that is highly susceptible for soil erosion. The soil erodibility value ranges from 0.01426 to 0.04001. It was found that the soil erodibility increases as organic content decreases, soil texture becomes finer and less permeable, and structure becomes poor. Prediction of soil erodibility and susceptibility to soil erosion is of great importance for soil erosion quantification, using GIS. The farm-unit level identification of soil types and existing specific problems are crucial in planning and implementation of any soil management strategies.
Although the problem of soil erosion is common in all countries, it is one of the more persisting... more Although the problem of soil erosion is common in all countries, it is one of the more persisting hazards in developing countries like Ethiopia which is a country located in tropic where there is higher precipitation and is vulnerable to almost all forms of environmental degradation which is also resulted from poor resource conservation practices. The main objective of this study is to determine soil erodibility and susceptibility to soil erosion in Shonkola mountainous area, Soro district. To determine soil erodibility and susceptibility to soil erosion, the percentage of primary soil separates (silt, very fine sand, and clay); percentage of organic matter; soil structure classes; and soil permeability were estimated. Soil samples were collected from 56 locations at an average depth of 15 cm to employ soil texture nomograph. Thus, soil erodibility of Shonkola area is determined and mapped to envisage the area that is highly susceptible for soil erosion. The soil erodibility value ranges from 0.01426 to 0.04001. It was found that the soil erodibility increases as organic content decreases, soil texture becomes finer and less permeable, and structure becomes poor. Prediction of soil erodibility and susceptibility to soil erosion is of great importance for soil erosion quantification, using GIS. The farm-unit level identification of soil types and existing specific problems are crucial in planning and implementation of any soil management strategies.
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