scholarly journals Geophysical borehole logging for control of driller’s records: hydrogeological case study from Voltaian sedimentary rocks in northern Ghana

2013 ◽  
Vol 3 (2) ◽  
pp. 491-500 ◽  
Author(s):  
William Agyekum ◽  
Kurt Klitten ◽  
Thomas Armah ◽  
Bruce Banoeng-Yakubo ◽  
Edmund Okoe Amartey
Keyword(s):  
Sedimentary Rocks ◽  
Northern Ghana ◽  
Borehole Logging

Identification and prioritization of farmers' innovations in northern Ghana

2014 ◽  
Vol 30 (6) ◽  
pp. 537-549 ◽  
Author(s):  
Justice A. Tambo ◽  
Tobias Wünscher
Keyword(s):  
Smallholder Farmers ◽  
Household Survey ◽  
Northern Ghana ◽  
Plant Residues ◽  
Simple Method ◽  
Pests And Diseases ◽  
Innovation Contest ◽  
Scientific Validation ◽  
Livestock Diseases

AbstractFarmers are innovators and experimenters and not just adopters of introduced technologies. The innovations developed by farmers could complement the highly promoted externally driven technologies in addressing the numerous challenges facing agriculture. The aim of this paper was to identify outstanding innovations developed by smallholder farmers in northern Ghana, and prioritize the high potential ones for further scientific validation or dissemination. Using an innovation contest that rewards farmers' creativity, we identified 29 promising innovations. Additionally, 19 innovations were scouted through a household survey. The innovations are largely extensive modifications of existing practices or combinations of different known practices in unique ways to save costs or to address crop and livestock production constraints. While some of the identified innovations can be recommended or disseminated to other farmers, most of them may require further validation or research. However, validating all of these innovations will be very expensive and time-consuming. We propose the multi-criteria decision-making analysis (MCDM) as a simple method to prioritize farmers' innovations. Using this method, we find that among the most promising innovations are those involving the control of weeds, pests and diseases using plant residues and extracts, and the treatment of livestock diseases using ethnoveterinary medicines. We briefly explain the six most highly ranked innovations. This case study from northern Ghana provides further proof that smallholder farmers develop diverse and spectacular innovations to address the myriad challenges they face, and these need to be recognized and promoted. We also conclude that contest and MCDM are useful methods that can be applied in unearthing and prioritizing farmer innovations, respectively.

scholarly journals Landscape Changes and Fragmentation Analysis in a Guinea Savannah Ecosystem: Case study of Talensi and Nabdam Districts of the Upper East region, Ghana

2016 ◽  
Vol 8 (1) ◽  
pp. 41 ◽  
Author(s):  
Steve Ampofo ◽  
Isaac Sackey ◽  
Boateng Ampadu
Keyword(s):  
Human Interaction ◽  
Northern Ghana ◽  
Landcover Change ◽  
East Region ◽  
Upper East Region ◽  
Spatio Temporal ◽  
Categorical Maps ◽  
Landsat Satellite

Landcover change is an observed natural change dynamics at both the local and regional levels. However, its scales are exacerbated by human interaction with its natural environment. The study examines these spatio-temporal changes in landcover and the level to which the change is accompanied by fragmentation of the identifiable cover types in the Talensi and Nabdam districts in Northern Ghana. The research uses digital classification of Landsat satellite imagery for 1999 and 2007 to produce the cover types which results in good accuracy levels of 66.39% and 63.03% respectively. Fragmentation analysis of the landscape was computed using FRAGSTATS® software for categorical maps obtained from the classified landcover maps for the two years. All cover types increased marginally. However, Bare areas decreased by as much as 17.17% and that of water decreased from 3% to 1%. The changing landscape involving conversions within and among various cover types is accompanied by fragmentation in all classes but more pronounced in the Bare class. The Bare class type which has more patches corresponds to the class with increased cover size and rather strangely decreases in the mean path size.

Identification of Double-layered Water-filled Zones Using TEM: A Case Study in China

2018 ◽  
Vol 23 (3) ◽  
pp. 297-304
Author(s):  
Guoqiang Xue ◽  
Dongyang Hou ◽  
Weizhong Qiu
Keyword(s):  
Field Survey ◽  
Coal Mines ◽  
Northern China ◽  
Shanxi Province ◽  
Well Drilling ◽  
Borehole Logging ◽  
Transient Electromagnetic ◽  
Geophysical Technique ◽  
Instrument Sensitivity

At present in China, the use of the transient electromagnetic method (TEM) is emerging as a leading geophysical technique for exploration of water-filled zones in coal mines. These zones are more conductive than the host coal and are easy targets to map. However, there is a growing interest for the investigations of double-layered or multi-layered mined-out zones. Therefore, it is necessary to study the feasibility of TEM's abilities to detect double-layered, water-filled voids. In this study, the basic hydrogeological conditions of a survey area, located in the northern China, are described. The corresponding geophysical models of the single- and double-layered water-filled zones are developed from borehole logging data. Then, forward calculations of different models are carried out with 1D numerical simulations. The modeling results show that it is feasible for TEM to identify these types of targets under certain conditions, including instrument sensitivity, low resistivity for the water-filled zones, and shallower depths. Moreover, the field survey for locating double-layered water-filled zones in coal mines in the Datong region of Shanxi Province is verified by well drilling.

scholarly journals Trends and risk factors associated with stillbirths: A case study of the Navrongo War Memorial Hospital in Northern Ghana

PLoS ONE ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. e0229013
Author(s):  
Engelbert A. Nonterah ◽  
Isaiah A. Agorinya ◽  
Edmund W. Kanmiki ◽  
Juliana Kagura ◽  
Mariatu Tamimu ◽  
...  
Keyword(s):  
Risk Factors ◽  
Memorial Hospital ◽  
Northern Ghana ◽  
Factors Associated
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