George Owusu- PhD
- University of Ghana
George Owusu
- PhD
- University of Ghana
About
19
Publications
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Introduction
Current institution
Publications
Publications (19)
The value-added by plastic film mulches are numerous in agricultural productivity and its global acceptance is unprecedented. However, its disturbing effects on the natural water cycling, surface energy fluxes and partitioning of evapotranspiration (ET) in drip-irrigated fields with plastic film mulch are often overlooked or not investigated due to...
Urban sprawl has gained popularity in academic discourse in recent times, but the majority of the research was conducted in developed countries. There is a marginal body of works on the character and nature of urban sprawl in Sub-Saharan Africa (SSA), although the region is experiencing one of the fastest rates of sprawl. Urbanisation in SSA is ver...
Fragmented ecosystems of the desiccated Aral Sea seek answers to the profound local hydrologically- and water-related problems. Particularly, in the Small Aral Sea Basin (SASB), these problems are associated with low precipitation, increased temperature, land use and evapotranspiration (ET) changes. Here, the utility of high-resolution satellite da...
Coastal towns along the coast of Africa are among the most vulnerable to climate change impacts such as flooding and sea level rise. Yet, because coastal conditions in many parts of the region are poorly understood, knowledge on which population groups are at the most risk is less known, particularly in the Greater Accra Metropolitan Area (GAMA) of...
Coastal towns along the coast of Africa are among the most vulnerable to climate change impacts such as flooding and sea level rise. Yet, because coastal conditions in many parts of the region are poorly understood, knowledge on which population groups are at the most risk is less known, particularly in the Greater Accra Metropolitan Area (GAMA) of...
The introduction of a sustainable management of freshwater resources to biological and hydrological processes of ecohydrology research by UNESCO's International Hydrologic Program (IHP) and the Man and Biosphere Program (MAB) calls for multiple and overarching philosophical explanations in ecohydrology. This paper reviews philosophical theories und...
The optimal management of water resources requires that the collected hydrogeological, meteorological, and spatial data be simulated and analyzed with appropriate models. In this study, a catchment-scale distributed hydrological modeling approach is applied to simulate water stress for the years 2000 and 2050 in a data scarce Pra Basin, Ghana. The...
The marketing and promotion of tourist sites through modern technologies such as geographic information system (GIS) and dynamic web technologies are slow in developing countries. This paper explores the potential of GIS in marketing tourism and examines how this can influence tourists' destination choice. The study mapped 41 tourist destination sp...
The study assesses regional and gender equity in healthcare coverage under two different healthcare policies – the Medium-Term Health Strategy (MTHS) and the National Health Insurance Scheme (NHIS) – among 10 regions in Ghana. The Afrobarometer survey round 1, conducted in 1999; round 2, conducted in 2004; round 4, conducted in 2008; and round 5, c...
The study uses GIS and SRTM 90 meter Digital Elevation Model (DEM) to identify streams, watersheds, flood hydrographs, and catchment characteristics such as Bifurcation Ratio (RB), Stream Length Ratio (RL), and Drainage Area Ratio (RA) in Ghana. It was found out that Volta basin occupies 69% land area of Ghana while the second tier of river basins...
he possibility of future climate change in Ghana has received much attention due to repeated droughts and floods over the last decades. The savanna zone which is described as the food basket of Ghana is highly susceptible to climate change impact. Scenarios from 20-year time slices of the near future – 2046-2065 – and the far future – 2081-2100 – c...
The urban landscape of Ghana, like most developing countries, is characterised by a mix of areas without water supply, and those with erratic and unreliable supply. These inadequacies are felt disproportionally in low-income communities, where their needs are often hidden in the aggregate statistics of the wider urban context. Using transect walks,...
Distributed erosion simulation models are useful in evaluation of different strategies for land-use and soil management improvement in watersheds. The increased soil erosion in Densu basin of Ghana has led to siltation of the river channel that is causing flooding in some parts of Accra, Ghana. The most urbanized basin in Ghana, Densu, supplies wat...
Questions
Question (1)
I am doing statistical downscaling for some weather stations in Ghana, Africa. I am planning to use about 10 GCMs or RGCMs. I have read that the following GCMs can be used:
1. Canadian Centre for Climate Modeling & Analysis Canada CCCMA-CGCM
2 Commonwealth Scientific and Industrial Research Organization Australia CSIRO-MK2
3 M´et´eo-France / Centre National de Recherches M´et´eorologiques France CNRM-CM3
4 NASA / Goddard Institute for Space Studies USA GISS- MODEL ER
5 Geophysical Fluid Dynamics Laboratory Coupled Model USA GFDL-CM2.0
6 Institut Pierre Simon Laplace France IPSL-CM4
7 Meteorological Institute of the University of Bonn, Meteorological Research Institute of KMA, and Model and Data group Germany/ Korea MIUB-ECHO-G
8 Max Planck Institute for Meteorology Germany MPI-OM/ECHAM5
9 Meteorological Research Institute Japan MRI-CGCM2.3.2A FB
Please you may answer part or all of the following questions:
1. Can you provide exact link (URL) where the current data for the above GCMs can be downloaded from? For example the first one can be found at http://www.cccsn.ec.gc.ca/?page=pred-canesm2 and with longitude and latitude of the stations one can enter them to retrieve the data. I am also open to a one-stop web page for retrieving all the GCMs. If '. nc' data is provided explain how to extract it. Also indicate the Year length of the GCM i.e. whether it is Calendar (366) or 365 or 360. You may suggest a statistical software or a package for the downscaling. Please I need both historical and future data up to 2100.
2. Add additional GCMs or RGCMs with the exact web links (URL) that are applicable to my study area, Ghana.
3. In case one has only a historical GCM data, for example NCEP-NCAR_1961_2005, how do you generate the future projection data up to 2100 using SDSM or any other open-source software?
4. Which predictors' variables combination can be used to model Maximum and Minimum temperature as well as Rainfall?
5. Why is that Root Mean square Deviation (RMSD) is normally large and index of agreement (d) normally small for rainfall downscaling model as compare to temperature? Which RMSD or d is tolerable for rainfall?
