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Coupling SWAT and bathymetric data in modelling reservoir catchment hydrology
Kwarteng E. A.,Gyamfi C.,Anyemedu F. O. K.,Adjei K. A.,Anornu G. K. 대한공간정보학회 2021 Spatial Information Research Vol.29 No.1
A physically based model; Soil and Water Assessment Tool (SWAT) and bathymetric data were integrated to simulate and evaluate the water balance of the Brimsu Reservoir from 2002 to 2018. The simulated water balance describes the changes in water storage of the reservoir as a hydrological component that is dependent on inflows (precipitation, runoff) and outflows (evaporation, infiltration, discharge and water consumption). In the absence of storage capacity data, a bathymetric survey was conducted to determine the capacity of the reservoir. The result showed that there has been a reduction of about 27.6% in gross capacity of the reservoir. The SWAT model indicates a satisfactory performance for both calibration (NSE = 0.66, Bias = - 5.0% and R2 = 0.86) and validation (NSE = 0.63, Bias = - 10.4% and R2 = 0.82) periods. The monthly water budget revealed that 30.50% and 69.50% of the total inflow within the catchment constitute direct precipitation and runoff respectively while 32.50%, 12.50%, 34.40% and 20.60% of total outflow represents evaporation, seepage, spillage and water consumed. Though the average final-to initial-volume ratio of 1.15 indicates that the reservoir is not emptying, and water is withdrawn from the reservoir at a sustainable rate, yet water from the reservoir does not yield the treatment plant’s design capacity of 29,500 m/day. Overall, the model demonstrated a good performance by providing quantitative information to serve as a guide for stakeholders to make better decisions in planning and managing the Brimsu Reservoir.
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Addo Priscilla,Fosu-Gyasi Samuel,Oduro-Kwarteng Sampson,Duku Godwin Armstrong,Awuah Esi 한국응용곤충학회 2024 Journal of Asia-Pacific Entomology Vol.27 No.1
The availability of the black soldier fly (BSF) at a location is of great importance if its larvae are to be used for commercial composting of municipal organic solid waste (MOSW). In this context, it is crucial to determine where the insects are readily available and how natural environmental conditions influence their oviposition. This study used MOSW as bait to determine locations where these insects are readily available and their egg cluster as an indication of their presence. Data were collected at four locations: Plantain farm, poultry farm, under a pear tree, and waste communal container site. For each site, data were collected in the morning (6:00 a. m.–12:00 p.m.), afternoon (12:00 p.m.–6:00 p.m.), and evening (after 6:00 p.m.) to determine the peak egglaying times of these insects. This was carried out for two seasons of the year – rainy season (June, July and August) and dry season (December, January, and February) to assess seasonal variability on oviposition and fecundity. Environmental conditions such as temperature, relative humidity, and light intensity were also measured under which oviposition took place. The highest average number of BSF egg clusters of 17.5 ± 13.74 was harvested at the waste communal container site and the lowest average number of 2 ± 0.81 was harvested at the poultry farm. Peak egg laying times were recorded in the afternoon between 12:00 p.m. and 6:00 p.m., where an average of 15.17 ± 4.7 clusters were harvested. Most BSF egg clusters were harvested during the rainy season, averaging 9.1 ± 12.2. The dry season recorded a higher average number of eggs per cluster at 454.18 ± 164.92. It is concluded that BSF larval composting technology can be commercialized in Kumasi, Ghana as the insects were readily available during the two main seasons in the country.
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Types of indigenous vegetables consumed, preparation, preferences and perceived benefits in Ghana
Atuna Richard A.,Djah Jemima,Achaglinkame Matthew A.,Bakker Sanne,Dari Linda,Osei-Kwarteng Mildred,Mahunu Gustav K.,Koomen Irene,Amagloh Francis K. 한국식품연구원 2022 Journal of Ethnic Foods Vol.9 No.-
Indigenous vegetables (IVs) are rich sources of essential nutrients, particularly vitamins and minerals, and other non-nutritive phytochemicals. IVs play a critical role in the food culture of the Ghanaian people. Despite their importance, they have over the years been mostly associated with the resource-poor. In this study, the types of IVs, preparation preferences, frequency of consumption and some perceived benefits ascribed by some Ghanaian consumers ( n = 1393) were investigated in a cross-sectional survey. Descriptive analysis and a chi-square test of independence were conducted to summarise and determine the relationship between gender, age and consumption frequency of the IVs. The study identified okra ( Abelmoschus esculentus ), cocoyam (Xanthosoma sagittifolium) leaves, jute mallow (Corchorus olitorius) and garden egg (Solanum melongena) as the popular IVs consumed by respondents. Among these, about 13.3% of women and 15.3% of men indicated they consume okra. Eight per cent of the women respondents and 6.7% of the men consumed jute mallow. Almost 57% of the respondents said the IVs were used to prepare stew and soup. More than a third (39%) of the respondents indicated that they consumed the IVs either daily or more than once a week. Women respondents’ frequency of IVs consumption was significantly different [X2(4,n= 1393) = 30.11,p= 0.000] from the men. The frequency of consumption of IVs for the elderly was significantly higher [X2(12,n= 1393) = 30.53,p= 0.002] as compared to the younger respondents. The main perceived benefits of IVs were nutrition- and health-related. The major barriers to the consumption of IVs were cost, non-availability, palatability and cultural. The IVs were largely wet-cooked and consumed as stews or sauces and soups. These findings form good bases for further empirical studies on the nutritional and other health-benefiting attributes of the specific IVs found in this study for sustainable promotion and utilisation in Ghana.
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