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Using Geospatial Information Component to Monitor the Watersheds along the Densu Basin in Ghana

Journal of Geographic Information System 2016年第5期8卷 618-632页

作者： Clement Nyamekye Faruk Kwansah Nyame samuel anim ofosu Department of Civil Engineering Koforidua Polytechnic Koforidua Ghana COCOBOD Cartography and Survey Division Accra Ghana

The Densu basin is a coastal river catchment in southern Ghana and a typical rural community like all other rural settlements in Ghana. It is the only basin amongst 43 other basins of the country that supplies water to two regional capitals of Ghana, namely, the capital city of Ghana, Accra and Eastern regional capital, Koforidua. The qualities of these water resources vary naturally and widely depending on climate, season, and the geology of the bedrock, as well as anthropogenic activities. The primary aim of this research is to determine data requirements for efficient and cost-effective development of a Geographic Information System (GIS) to map and detect the extent of the sources of the watersheds and how to protect the environment for continuous supply of water. Among the Nine catchment areas, only one catchment WSA_05 (Koforidua Township) was determined to have a very high risk of being vulnerable and therefore required urgency to protect environment for continuous supply of water. Four catchment areas WSA_02 (Weija Dam), WSA_03 (Apedwa-Asafo), WSA_06 (Suhum) and WSA_09 (New Tafo) were determined to have a high risk of being affected and therefore there was the need to protect the environment for continuous supply of water. Ghana as a country will have to take a responsible step in protecting its water body and its environment to enable continuous and sustainable supply of water to its citizens. This study therefore reveals the state of the water users and how urgent it environment needs to be protected.

关键词： Watershed Geographical Information System (GIS) Densu Basin Water Service Areas (WSA) Land Use Land Cover (LULC)

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Evaluating the Stability of Indigenous Akwadum Soil with Cassava Peel Ash and Quarry Dust

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Journal of Geoscience and Environment Protection 2016年第12期4卷 48-55页

作者： Clement Nyamekye samuel anim ofosu Alexander Fordjour Theophilus Ayitey-Adjin Department of Civil Engineering Koforidua Technical University Koforidua Ghana

Cassava peels are produced as a waste from cassava, which are disposed into landfills. These become an environmental problem;therefore the use of cassava peel ash (CPA) as a soil stabilizer must be encouraged. This study investigates the effects of CPA and quarry dust (QD) on the engineering properties of Akwadum soil behavior, using compaction test, Atterberg limit, and California bearing ratio (CBR). These properties were compared with those of unstabilized soil (original) and soil stabilized with CPA and QD. The natural soil was obtained from a borrowed pit at Akwadum near Koforidua at an average depth of 0.8 m which is meant for road works. This soil sample was stabilized with CPA and QD at 5%, 10% and 20% respectively. The compaction, California bearing ratio and Atterberg limit test were performed on the stabilized soils to thoroughly evaluate them. The results indicate that increasing the percentage of CPA to the natural soil decreases the maximum dry density at increasing optimum water content. The addition of QD at higher percentage increases the maximum dry density at decreasing optimum water content. The results reveal that both QD and CPA improve the engineering properties of the soil with QD providing better results.

关键词： Cassava Peel Ash (CPA) Stabilization Quarry Dust (QD) CBR Atterberg Limit

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Bacteriological Assessment of the Quality of Raw-mixed Vegetable Salads Prepared and Sold by Street Food Vendors in Korle-Gonno, Accra Metropolis, Ghana

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Journal of Health Science 2014年第11期2卷 560-566页

作者： George Antepim Pesewu Jeffery N.Y.K. Agyei Kwakye I. Gyimah Michael A. Olu-Taiwo samuel Osei-Djarbeng Francis S. Codjoe Isaac anim-Baidoo Rebecca Steele-Dadzie Patrick F. Ayeh-Kumi Department of Medical Laboratory Sciences (MEDLAB) School of Biomedical and Allied Health Sciences College of HealthSciences University of Ghana P. O. Box KB 143 Korle-Bu Accra Ghana W/A Department of Pharmaceutical Sciences Kumasi Polytechnic P. O. Box 854 Kumasi Ghana W/A Department of Dieteties School of Biomedical and Allied Health Sciences College of Health Sciences University of Ghana P. O.Box KB 143 Korle-Bu Accra Ghana W/A

It is known that raw-mixed vegetable salads are essential part of people＇s diet all around the world. These vegetables salads are consumed raw and often without heat treatment or thorough washing. Raw-mixed vegetable salads therefore can serve as vehicle for the transmission of pathogenic microorganisms associated with human diseases. The aim of this study was to isolate and analyze the common bacterial pathogens associated with raw-mixed vegetable salads prepared and sold by street food vendors in Korle-Gonno, Accra, Metropolis, Ghana. A total of 75 different raw-mixed vegetable salads were sampled from the open places and were subjected to bacteriological analysis using standard Food and Agriculture Organization （FAO） of the United Nations （UN） total aerobic plate count method. A total mean colony count of bacteria ranged 0.87-5.6 log10 CFU/g was isolated. Escherichia coli （35%）, Staphylococcus aureus （33%）, Klebsiella sp. （17%）, and Bacillus sp. （15%） were the bacteria isolated from the various raw-mixed vegetables salads investigated. This study has shown that all the raw-mixed vegetable salads sampled from Korle-Gonno, Accra Metropolis, Ghana had a high bacterial contamination and their persistence and proliferation is a reflection of poor hygienic practices by the street food vendors. The use of unsafe or contaminated water to irrigate the vegetables when growing on the farm or garden could also be a contributing factor.

关键词： Quality raw-mixed vegetable salad aerobic plate count Escherichia coli.

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