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Although the protection of the aquatic environment is high on the world water resources agenda, most developing countries still lack the technical and institutional capacity to establish environmental water allocation practices and policies. The existing methods of assessment of environmental water allocations are either complex and resource-intensive or not tailor-made for the specific conditions of a particular country or region. To promote emerging concepts of environmental flow assessment and management, it is important to change the dominant perception that environmental demand is the least important and create awareness among responsible authorities about existing methodologies and processes that should be followed. This report presents some of these approaches and illustrates their applicability in the specific context of the East Rapti River basin, which features one of the main tourist attractions of Nepal, the Chitwan National Park.
Quantification of hydrological processes and water requirements of aquatic ecosystems is required for many projects related to environmental security and efficient water use in agriculture. This also applies to the Asian monsoon region. This paper focuses on the Walawe River basin, located in a semi-arid zone of southern Sri Lanka. The two major reservoirs in the upstream and middle reaches of the river with a total capacity of 486 million cubic meters (MCM) have significantly affected the hydrology of the river, with associated adverse environmental and social consequences.
"CGIAR Challenge Program on Water & Food; Future Harvest"--Cover.
Contributed articles.
This book presents results of scientific studies ranging from hydrological modelling to water management and policy issues in the Nile River basin. It examines the physical, hydrometeorological and hydrogeological description of the basin along with analysis in understanding the hydrological processes of the basin under the changing land-use stemming from population pressure and increased natural resources tapping. The book discusses the increased impact of climate change on the river flows, and such issues as water availability and demand, management and policy to offset the imbalance between demand and available resources. This book will be of interest to researchers, practitioners, water resources mangers, policy makers as well as graduate and undergraduate students. It is a useful reference text for ecohydrology, arid zone hydrology, hydrology of transboundary rivers and similar courses.
The International Water Management Institute (IWMI) has been working in Nepal since 1986 with the objective of undertaking research in water management and to strengthen the research capabilities of concerned government agencies. The research helped to develop appropriate mechanisms for providing support to Farmer-Managed Irrigation Systems (FMIS) and the initiation of participatory irrigation management (PIM). The river basin studies helped policy formulation for integrated planning and management of water resources besides the methodological contribution through the development of appropriate tools for water management studies. It also contributed to enhancing the capabilities of agency officials and local researchers through their involvement in research activities.
This report highlights the potentially significant impacts on the hydrologic cycle and the importance of considering secondary effects, particularly with regard to water, resulting from the widespread adoption of global climate change mitigation measures. It is recommended that the implicit hydrologic dimensions of climate change mitigation should be more formally articulated within the international environmental conventions, and recognized within future UNFCCC negotiations on the CDM-AR provisions.
Containing the proceedings of the Second International Conference on the title topic, the book examines issues related to the nature of water, and its use and exploitation by society. Since ensuring an adequate water supply is becoming a critical issue in more and more countries, the conference brings together specialists from the social sciences and humanistic disciplines and the physical and natural sciences, biology, environmental sciences, and health to bridge gaps between the disciplines in addressing the problem. The international, interdisciplinary nature of the conference participants makes it possible to arrive at equitable solutions to the many transnational issues, relating to the rights of states, which arise around water supply.The book discusses: The nature of water; Water as a human right; Water as the source of life; Water in a changing climate; Future water demands and adaptation strategies; Water resources contamination; Water resources management; Irrigation and desertification; Water, sanitation and health; Transnational water rights; Legislation and controls; Lessons to be learnt; Water and disaster management.
This report analyzes the economics of alternative microirrigation technologies ranging from low-cost drip and sprinkler systems to the capital-intensive systems, the determinants of adoption of microirrigation technology, the poverty outreach of the different microirrigation systems, and the sustainability implications of microirrigation adoption.
This paper reports on a form of multi-criteria analysis that provides a formal approach for evaluating the suitability of a wetland for specific agricultural uses, and ensures that explicit consideration is given to the possible consequences of such utilization. The method is based on a hybrid of ideas taken from concepts and methodologies related to: environmental flow assessments, land suitability classification and the hazard evaluation procedures used in the design of dams. The approach, which elaborates the idea of working wetlands, is generic, though the examples presented are for case studies from southern Africa.