Opposing Currents

Opposing Currents PDF

Author: Vivienne Bennett

Publisher: University of Pittsburgh Pre

Published: 2005-01-15

Total Pages: 265

ISBN-13: 0822972654

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In every part of the world, looming or full-blown water crises threaten communities from the largest cities to the smallest rural towns. Over the past two decades, there has been increased attention at the global level to the devastating effects of water shortages and pollution, and policies and principles for implementing the sustainable management of water resources have proliferated. But scholars and activists are beginning to understand that top-down environmental policies are doomed to fail if they do not address local cultures and customary uses. As the contributors to Opposing Currents illustrate, that failure is most evident in the inability to recognize that women not only should become central to water management at the local level, but that, in fact, they already are.This volume focuses on women in Latin America as stakeholders in water resources management. It makes their contributions to grassroots efforts more visible, explains why doing so is essential for effective public policy and planning in the water sector, and provides guidelines for future planning and project implementation. After an in-depth review of gender and water management policies and issues in relation to domestic usage, irrigation, and sustainable development, the book provides a series of case studies prepared by an interdisciplinary group of scholars and activists. Covering countries throughout the hemisphere, and moving freely from impoverished neighborhoods to the conference rooms of international agencies, the book explores the various ways in which women are-and are not-involved in local water initiatives across Latin America. Insightful analyses reveal what these case studies imply for the success or failure of various regional efforts to improve water accessibility and usability, and suggest new ways of thinking about gender and the environment in the context of specific policies and practices.

Coastal Bottom Boundary Layers and Sediment Transport

Coastal Bottom Boundary Layers and Sediment Transport PDF

Author: Peter Nielsen

Publisher: World Scientific

Published: 1992

Total Pages: 356

ISBN-13: 9789810204730

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This book is intended as a useful handbook for professionals and researchers in the areas of Physical Oceanography, Marine Geology, Coastal Geomorphology and Coastal Engineering and as a text for graduate students in these fields. With its emphasis on boundary layer flow and basic sediment transport modelling, it is meant to help fill the gap between general hydrodynamic texts and descriptive texts on marine and coastal sedimentary processes. The book commences with a review of coastal bottom boundary layer flows including the boundary layer interaction between waves and steady currents. The concept of eddy viscosity for these flows is discussed in depth because of its relation to sediment diffusivity. The quasi-steady processes of sediment transport over flat beds are discussed. Small scale coastal bedforms and the corresponding hydraulic roughness are described. The motion of suspended sand particles is studied in detail with emphasis on the possible suspension maintaining mechanisms in coastal flows. Sediment pickup functions are provided for unsteady flows. A new combined convection-diffusion model is provided for suspended sediment distributions. Different methods of sediment transport model building are presented together with some classical models.