Key stakeholders and actions to address Lake Beseka’s challenges in Ethiopia: A social network approach


Book Description

Lake Beseka is a shallow, saline, endorheic lake in the East African Rift Valley of Ethiopia that has dramatically grown in size due to large-scale irrigation development in its catchment area. Recent artificial connections of the lake with the Awash River system to contain lake size have led to a series of changes and impacts on different water users, but are not reflected in lake and Awash River governance and institutions. Understanding who are the key actors affecting Lake Beseka and strengthening their linkages can help identify solutions that sustainably contain or reduce the lake’s size, improve its water quality, and address costs to nearby and downstream populations as well as the environment. Thus, this study analyzed qualitative data collected from net-mapping – a network analysis that identifies actors or stakeholders as well as linkages and relative power positions among stakeholders. The resulting network reflects the complexity of the water governance system including upstream actors who affect the size and quality of the lake as well as downstream actors who suffer from adverse consequences. The Awash Basin Development Authority, Metehara Sugar Factory, regional bureaus, and federal ministries were identified as the most influential actors affecting how Lake Beseka is used and managed. Actors most affected by the lake expansion and quality problems such as downstream communities currently have no role in the governance of the lake. Metehara Municipality, woreda offices, research institutes, and farmers were considered to have moderate influence. Stakeholders who participated in the net-mapping workshops identified flooding, salinity, water-related conflict, and health effects as the four main challenges of the lake. The study suggests that developing multi-stakeholder partnerships or platforms across most influential and most affected actors could support a more comprehensive understanding of the multiple challenges Lake Beseka is posing. It could also foster the development of more integrated solutions that support the different stakeholders in the lake catchment area and the Awash River Basin.







Surface Water-Quality Modeling


Book Description

National and international interest in finding rational and economical approaches to water-quality management is at an all-time high. Insightful application of mathematical models, attention to their underlying assumptions, and practical sampling and statistical tools are essential to maximize a successful approach to water-quality modeling. Chapra has organized this user-friendly text in a lecture format to engage students who want to assimilate information in manageable units. Comical examples and literary quotes interspersed throughout the text motivate readers to view the material in the proper context. Coverage includes the necessary issues of surface water modeling, such as reaction kinetics, mixed versus nonmixed systems, and a variety of possible contaminants and indicators; environments commonly encountered in water-quality modeling; model calibration, verification, and sensitivity analysis; and major water-quality-modeling problems. Most formulations and techniques are accompanied by an explanation of their origin and/or theoretical basis. Although the book points toward numerical, computer-oriented applications, strong use is made of analytical solutions. In addition, the text includes extensive worked examples that relate theory to applications and illustrate the mechanics and subtleties of the computations.







Past Climate Variability through Europe and Africa


Book Description

This book focuses on two complementary time-scales, the Holocene (approximately the last 11,500 years) and the last glacial-interglacial cycle (approximately the last 130,000 years) to synthesize evidence of climate variability at the regional and continental scale across Europe and Africa. This is the first examination of historical climate variations at such a scale, and thus sets a benchmark for future research.




Tilapias: Biology and Exploitation


Book Description

Referred to in the Bible, pictured on the wall-friezes of ancient Egyptian tombs, and a subject of fascination for generations of scientists, the tilapias (Cichlidae: Tilapiini) have featured in the diet and culture of humankind for thousands of years. The present century has seen their spread from Africa throughout the tropics and sub-tropics, largely for food and fisheries purposes. This book attempts to pull together our knowledge of this important group - their biology and fisheries and aquaculture - in a single volume, something that has not been done comprehensively for nearly two decades. A succession of chapters by acknowledged authorities covers evolution, phylogenetic relationships and biogeography, reproductive biology, mating systems and parental care, diet, feeding and digestive physiology, environmental physiology and energetics, the role of tilapias in ecosystems, population dynamics and management, genetics, seed production, nutrition, farming, economics and marketing. The book is aimed at biologists, fisheries scientists, aquaculturists, and all interested in aquatic ecology.







Landscapes and Landforms of Ethiopia


Book Description

This book provides a succinct but comprehensive presentation of key geomorphological locations and topics including information about geomorphological heritage and maps to visit the most important sites. Apart from often being remarkably scenic, landscapes reveal stories that often can be traced back in time tens of million years and include unique events. This is particularly true for Ethiopia where spectacular examples of different landforms are present. Its geomorphology varies from highlands, marked by high volcanoes and incised by deep river gorges, to the rift valley lakes endorheic systems and the below sea level lowlands with characteristic landscapes which are unique in the world. Landscapes and Landforms of Ethiopia highlights all these topics including essential information about geology and tectonic framework, past and present climate, hydrology, geographical regions and long-term geomorphological history. It is a highly informative book, providing insight for readers with an interest in geography and geomorphology.




Pastoralism and Development in Africa


Book Description

Once again, the Horn of Africa has been in the headlines. And once again the news has been bad: drought, famine, conflict, hunger, suffering and death. The finger of blame has been pointed in numerous directions: to the changing climate, to environmental degradation, to overpopulation, to geopolitics and conflict, to aid agency failures, and more. But it is not all disaster and catastrophe. Many successful development efforts at ‘the margins’ often remain hidden, informal, sometimes illegal; and rarely in line with standard development prescriptions. If we shift our gaze from the capital cities to the regional centres and their hinterlands, then a very different perspective emerges. These are the places where pastoralists live. They have for centuries struggled with drought, conflict and famine. They are resourceful, entrepreneurial and innovative peoples. Yet they have been ignored and marginalised by the states that control their territory and the development agencies who are supposed to help them. This book argues that, while we should not ignore the profound difficulties of creating secure livelihoods in the Greater Horn of Africa, there is much to be learned from development successes, large and small. This book will be of great interest to students and scholars with an interest in development studies and human geography, with a particular emphasis on Africa. It will also appeal to development policy-makers and practitioners.




Cross-Cultural Risk Perception


Book Description

Cross-Cultural Risk Perception demonstrates the richness and wealth of theoretical insights and practical information that risk perception studies can offer to policy makers, risk experts, and interested parties. The book begins with an extended introduction summarizing the state of the art in risk perception research and core issues of cross-cultural comparisons. The main body of the book consists of four cross-cultural studies on public attitudes towards risk in different countries, including the United States, Australia, New Zealand, France, Germany, Sweden, Bulgaria, Romania, Japan, and China. The last chapter critically discusses the main findings from these studies and proposes a framework for understanding and investigating cross-cultural risk perception. Finally, implications for communication, regulation and management are outlined. The two editors, sociologist Ortwin Renn (Center of Technology Assessment, Germany) and psychologist Bernd Rohrmann (University of Melbourne, Australia), have been engaged in risk research for the last three decades. They both have written extensively on this subject and provided new empirical and theoretical insights into the growing body of international risk perception research.