scholarly journals Rainfall and Water Resources Variability in Sub-Saharan Africa during the Twentieth Century

2009 ◽  
Vol 10 (1) ◽  
pp. 41-59 ◽  
Author(s):  
Declan Conway ◽  
Aurelie Persechino ◽  
Sandra Ardoin-Bardin ◽  
Hamisai Hamandawana ◽  
Claudine Dieulin ◽  
...  
Keyword(s):  
Water Resources ◽  
West Africa ◽  
Southern Africa ◽  
River Flow ◽  
Data Availability ◽  
Sub Saharan Africa ◽  
Spatial And Temporal Variability ◽  
Rainfall Runoff ◽  
River Flows ◽  
Sub Saharan

Abstract River basin rainfall series and extensive river flow records are used to characterize and improve understanding of spatial and temporal variability in sub-Saharan African water resources during the last century. Nine major international river basins were chosen for examination primarily for their extensive, good quality flow records. A range of statistical descriptors highlight the substantial variability in rainfall and river flows [e.g., differences in rainfall (flows) of up to −14% (−51%) between 1931–60 and 1961–90 in West Africa], the marked regional differences, and the modest intraregional differences. On decadal time scales, sub-Saharan Africa exhibits drying across the Sahel after the early 1970s, relative stability punctuated by extreme wet years in East Africa, and periodic behavior underlying high interannual variability in southern Africa. Central Africa shows very modest decadal variability, with some similarities to the Sahel in the adjoining basins. No consistent signals in rainfall and river flows emerge across the whole of the region. An analysis of rainfall–runoff relationships reveals varying behavior including strong but nonstationary relationships (particularly in West Africa); many basins with marked variations (temporal and spatial) in strength; weak, almost random behavior (particularly in southern Africa); and very few strong, temporally stable relationships. Twenty-year running correlations between rainfall and river flow tend to be higher during periods of greater rainfall station density; however, there are situations in which weak (strong) relationships exist even with reasonable (poor) station coverage. The authors conclude for sub-Saharan Africa that robust identification and attribution of hydrological change is severely limited by data availability, conflicting behavior across basins/regions, low signal-to-noise ratios, sometimes weak rainfall–runoff relationships, and limited quantification of the magnitude and effects of land use change.

Faith Tabernacle Congregation, the 1918–19 Influenza Pandemic and Classical Pentecostalism in Colonial West Africa

2020 ◽  
Vol 26 (3) ◽  
pp. 219-238
Author(s):  
Adam Mohr
Keyword(s):  
West Africa ◽  
Influenza Pandemic ◽  
Assemblies Of God ◽  
Sub Saharan Africa ◽  
Orthodox Medicine ◽  
Massive Growth ◽  
Small Branch ◽  
Pentecostal Churches ◽  
Sub Saharan ◽  
Apostolic Church

The 1918–19 influenza pandemic killed between 30 and 50 million people worldwide. In Sub-Saharan Africa, as Terence Ranger points out, the pandemic left an indelible mark, including the unforeseen emergence of anti-medical religious movements. None were as significant as Faith Tabernacle Congregation, the Philadelphia-based divine-healing church that spurred a massive revival in West Africa – and a network stretching from Ivory Coast to Nigeria – without ever sending missionaries. They evangelised through personal letters exchanged across the Atlantic, and Faith Tabernacle literature sent from Philadelphia to various leaders in West Africa. The 1918–19 influenza pandemic was the spark that led to the church's massive growth, from one small branch before the pandemic began in 1918 to 10,500 members and nearly 250 branches of Faith Tabernacle in West Africa at its zenith in 1926. After the church's rapid demise between 1926 and 1929, leaders of Faith Tabernacle established most of the oldest Pentecostal Churches in the Gold Coast and Nigeria – such as the Apostolic Faith, the Apostolic Church, the Christ Apostolic Church and the Assemblies of God (Nigeria). Classical Pentecostalism, therefore, is Faith Tabernacle's legacy in West Africa, while abstinence from orthodox medicine continued to be debated within these Pentecostal circles.

scholarly journals Wealth-related inequalities in demand for family planning satisfied among married and unmarried adolescent girls and young women in sub-Saharan Africa

2021 ◽  
Vol 18 (S1) ◽  
Author(s):  
Martin K. Mutua ◽  
Yohannes D. Wado ◽  
Monica Malata ◽  
Caroline W. Kabiru ◽  
Elsie Akwara ◽  
...  
Keyword(s):  
Family Planning ◽  
West Africa ◽  
Adolescent Girls ◽  
Young Women ◽  
Rate Of Change ◽  
Sub Saharan Africa ◽  
Demographic And Health Surveys ◽  
Sexually Active ◽  
Sub Saharan ◽  
Over Time

Abstract Background The use of modern contraception has increased in much of sub-Saharan Africa (SSA). However, the extent to which changes have occurred across the wealth spectrum among adolescents is not well known. We examine poor-rich gaps in demand for family planning satisfied by modern methods (DFPSm) among sexually active adolescent girls and young women (AGYW) using data from national household surveys. Methods We used recent Demographic and Health Surveys and Multiple Indicator Cluster Surveys to describe levels of wealth-related inequalities in DFPSm among sexually active AGYW using an asset index as an indicator of wealth. Further, we used data from countries with more than one survey conducted from 2000 to assess DFPSm trends. We fitted linear models to estimate annual average rate of change (AARC) by country. We fitted random effects regression models to estimate regional AARC in DFPSm. All analysis were stratified by marital status. Results Overall, there was significant wealth-related disparities in DFPSm in West Africa only (17.8 percentage points (pp)) among married AGYW. The disparities were significant in 5 out of 10 countries in Eastern, 2 out of 6 in Central, and 7 out of 12 in West among married AGYW and in 2 out of 6 in Central and 2 out of 9 in West Africa among unmarried AGYW. Overall, DFPSm among married AGYW increased over time in both poorest (AARC = 1.6%, p < 0.001) and richest (AARC = 1.4%, p < 0.001) households and among unmarried AGYW from poorest households (AARC = 0.8%, p = 0.045). DPFSm increased over time among married and unmarried AGYW from poorest households in Eastern (AARC = 2.4%, p < 0.001) and Southern sub-regions (AARC = 2.1%, p = 0.030) respectively. Rwanda and Liberia had the largest increases in DPFSm among married AGYW from poorest (AARC = 5.2%, p < 0.001) and richest (AARC = 5.3%, p < 0.001) households respectively. There were decreasing DFPSm trends among both married (AARC = − 1.7%, p < 0.001) and unmarried (AARC = − 4.7%, p < 0.001) AGYW from poorest households in Mozambique. Conclusion Despite rapid improvements in DFPSm among married AGYW from the poorest households in many SSA countries there have been only modest reductions in wealth-related inequalities. Significant inequalities remain, especially among married AGYW. DFPSm stalled in most sub-regions among unmarried AGYW.

Genetic polymorphism and population structure ofEchinococcus ortleppi

Parasitology ◽  
2016 ◽  
Vol 144 (4) ◽  
pp. 450-458 ◽  
Author(s):  
F. ADDY ◽  
M. WASSERMANN ◽  
F. BANDA ◽  
H. MBAYA ◽  
J. ASCHENBORN ◽  
...  
Keyword(s):  
Genetic Polymorphism ◽  
South America ◽  
Southern Africa ◽  
Dna Sequences ◽  
Intraspecific Variability ◽  
Sensu Stricto ◽  
Sub Saharan Africa ◽  
Geographical Regions ◽  
Sub Saharan ◽  
Eastern And Southern Africa

SUMMARYThe zoonotic cestodeEchinococcus ortleppi(Lopez-Neyra and Soler Planas, 1943) is mainly transmitted between dogs and cattle. It occurs worldwide but is only found sporadically in most regions, with the notable exception of parts of southern Africa and South America. Its epidemiology is little understood and the extent of intraspecific variability is unknown. We have analysed in the present study the genetic diversity among 178E. ortleppiisolates from sub-Saharan Africa, Europe and South America using the complete mitochondrialcox1(1608 bp) andnad1(894 bp) DNA sequences. Genetic polymorphism within the loci revealed 15cox1and sixnad1haplotypes, respectively, and 20 haplotypes of the concatenated genes. Presence of most haplotypes was correlated to geographical regions, and only one haplotype had a wider spread in both eastern and southern Africa. Intraspecific microvariance was low in comparison withEchinococcus granulosussensu stricto, despite the wide geographic range of examined isolates. In addition, the various sub-populations showed only subtle deviation from neutrality and were mostly genetically differentiated. This is the first insight into the population genetics of the enigmatic cattle adaptedEchinococcus ortleppi. It, therefore, provides baseline data for biogeographical comparison amongE. ortleppiendemic regions and for tracing its translocation paths.

Firearms in Southern Africa: A survey

1971 ◽  
Vol 12 (4) ◽  
pp. 517-530 ◽  
Author(s):  
Shula Marks ◽  
Anthony Atmore
Keyword(s):  
Nineteenth Century ◽  
Seventeenth Century ◽  
Southern Africa ◽  
Sub Saharan Africa ◽  
Black And White ◽  
Sub Saharan ◽  
Settler Population ◽  
White Settlement

The relationships of the peoples of southern Africa after the establishment and expansion of the white settlement in the mid-seventeenth century can be seen in terms of both conflict and interdependence, both resistance and collaboration. The conflict often split over into warfare, not only between black and white, but also within both groups. As time passed, firearms came to be used by ever-widening circles of the combatants, often as much the result of the increased collaboration and interdependence between peoples as of the increased conflict. As Inez Sutton has pointed out, ‘in contrast to most of the rest of [sub-Saharan] Africa, the presence of a settler population ensured that the supply of arms was the most modern rather than the most obsolete’, and on the whole non-whites were acutely aware of changes in the manufacture of firearms in the nineteenth century.

scholarly journals South Asia river-flow projections and their implications for water resources

2015 ◽  
Vol 19 (12) ◽  
pp. 4783-4810 ◽  
Author(s):  
C. Mathison ◽  
A. J. Wiltshire ◽  
P. Falloon ◽  
A. J. Challinor
Keyword(s):  
Water Resources ◽  
South Asia ◽  
River Flow ◽  
Climate Model ◽  
Asian Summer Monsoon ◽  
Regional Climate ◽  
Global Climate Models ◽  
Climate Projections ◽  
The South ◽  
River Flows

Abstract. South Asia is a region with a large and rising population, a high dependence on water intense industries, such as agriculture and a highly variable climate. In recent years, fears over the changing Asian summer monsoon (ASM) and rapidly retreating glaciers together with increasing demands for water resources have caused concern over the reliability of water resources and the potential impact on intensely irrigated crops in this region. Despite these concerns, there is a lack of climate simulations with a high enough resolution to capture the complex orography, and water resource analysis is limited by a lack of observations of the water cycle for the region. In this paper we present the first 25 km resolution regional climate projections of river flow for the South Asia region. Two global climate models (GCMs), which represent the ASM reasonably well are downscaled (1960–2100) using a regional climate model (RCM). In the absence of robust observations, ERA-Interim reanalysis is also downscaled providing a constrained estimate of the water balance for the region for comparison against the GCMs (1990–2006). The RCM river flow is routed using a river-routing model to allow analysis of present-day and future river flows through comparison with available river gauge observations. We examine how useful these simulations are for understanding potential changes in water resources for the South Asia region. In general the downscaled GCMs capture the seasonality of the river flows but overestimate the maximum river flows compared to the observations probably due to a positive rainfall bias and a lack of abstraction in the model. The simulations suggest an increasing trend in annual mean river flows for some of the river gauges in this analysis, in some cases almost doubling by the end of the century. The future maximum river-flow rates still occur during the ASM period, with a magnitude in some cases, greater than the present-day natural variability. Increases in river flow could mean additional water resources for irrigation, the largest usage of water in this region, but has implications in terms of inundation risk. These projected increases could be more than countered by changes in demand due to depleted groundwater, increases in domestic use or expansion of water intense industries. Including missing hydrological processes in the model would make these projections more robust but could also change the sign of the projections.

scholarly journals Hydrological education and training needs in Sub-Saharan Africa: requirements, constraints and progress

2011 ◽  
Vol 8 (6) ◽  
pp. 10565-10587
Author(s):  
D. A. Hughes
Keyword(s):  
Water Resources ◽  
Critical Mass ◽  
Academic Research ◽  
Institutional Support ◽  
Education And Training ◽  
Training Needs ◽  
Sub Saharan Africa ◽  
Sub Saharan ◽  
Hydrology And Water Resources ◽  
And Training

Abstract. This paper represents a perspective on the education and training needs related to hydrology and water resources science within the sub-Saharan Africa region and discusses the requirements of the region, some of the relatively recent developments and initiatives and some of the constraints that exist and remain difficult to surmount. The requirements include the development of academic research capacity and technical skill for both the private and public sector at a variety of levels. Some of the constraints that exist include a lack of adequate funding, lack of follow-up after short training courses, lack of institutional support to continue training, and competition for major water resources development projects from organizations outside the region. One of the main conclusions is that to sustain both educational and practical expertise in hydrology and water resources science within the region there is a need to build a "critical mass" of local expertise. Part of this could be achieved by increasing networking within the region and promoting the sharing of information, tools and expertise. There is also a need to promote institutional support.

scholarly journals Evaluating the Potential of Underdeveloped Land for Rice Production in Sub-Saharan Africa — A Case Study of Floodplains in the Northern Region of Ghana, West Africa

2017 ◽  
Vol 51 (1) ◽  
pp. 77-84
Author(s):  
Keiichi HAYASHI ◽  
Yasuhiro TSUJIMOTO ◽  
Tamao HATTA ◽  
Yukiyo YAMAMOTO ◽  
Jun-Ichi SAKAGAMI ◽  
...  
Keyword(s):  
West Africa ◽  
Northern Region ◽  
Rice Production ◽  
Sub Saharan Africa ◽  
Sub Saharan

An Historical Assessment and Analysis of Economic Imperialism in West Africa

2021 ◽  
pp. 1-17
Author(s):  
Ayokunle Olumuyiwa Omobowale ◽  
Natewinde Sawadogo
Keyword(s):  
West Africa ◽  
Civil Wars ◽  
National Development ◽  
West African ◽  
Sub Saharan Africa ◽  
Skilled Workers ◽  
The West ◽  
West African Coast ◽  
Sub Saharan ◽  
Economic Imperialism

Abstract The West African political economy has been shaped by the policies, decisions and actions of dominant European imperialist countries since about over 500 years. Starting with imperial merchant capitalism along the West African coast in the 16th Century and French gradual acquisition of Senegal as a colony as from 1677, West Africa has remained under the imperialist hold. West Africa remains economically dependent on its former colonial masters despite more than 60 years since the countries started gaining independence. The consequences of economic imperialism on West Africa have included exploitative resource extraction, proxy and resource influenced civil wars, illegal trade in natural resources, mass poverty, and external migration of skilled workers necessary for national development. The world sees and broadcasts poverty, starvation, conflict and Saharan migration in the West African sub-continent, but hardly reports the exploitative imperialistic processes that have produced poverty and misery in West Africa in particular and across sub-Saharan Africa in general.

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