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"Waterhuishouding."
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Principles of soil and plant water relations
Principles of Soil and Plant Water Relations combines biology and physics to show how water moves through the soil-plant-atmosphere continuum.This text explores the instrumentation and the methods used to measure the status of water in soil and plants.
eBook
A Macroscopic Water Extraction Model for Nonuniform Transient Salinity and Water Stress
Quantitative description of root‐water uptake under combined salinity and water stress is needed to optimize crop yields and water management in arid and semiarid regions. This study was conducted to develop a simple macroscopic root‐water uptake model for nonuniform transient soil water content and salinity conditions in the root zone. This new model and previous models were tested against detailed experimental data obtained with Alfalfa (Medicago sativa L.) grown in the greenhouse in packed sandy loam (Typic Haplaquent) columns. Soil water content, pressure head, and osmotic head distributions in the root zone were varied by means of the amounts, application intervals, and salinities of the irrigation water. Experimental data under separate and combined stresses were used to test the various models using mean values of soil solution osmotic and pressure heads. The simple additive reduction function provided the worst agreement with the experimental data, while for most cases the multiplicative reduction functions could not adequately account for both water and salinity stress conditions. The newly proposed linear reduction function is neither additive nor multiplicative, but was assumed that both the intersect and slope of the reduction function increased with salinity. This model provided excellent agreement with the experimental data, particularly at higher soil solution salinities. The new reduction function could be used with any other nonlinear salinity reduction function.
Journal Article
Hazardous metropolis
Although better known for its sunny skies, Los Angeles suffers devastating flooding. This book explores a fascinating and little-known chapter in the city's history—the spectacular failures to control floods that occurred throughout the twentieth century. Despite the city's 114 debris dams, 5 flood control basins, and nearly 500 miles of paved river channels, Southern Californians have discovered that technologically engineered solutions to flooding are just as disaster-prone as natural waterways. Jared Orsi's lively history unravels the strange and often hazardous ways that engineering, politics, and nature have come together in Los Angeles to determine the flow of water. He advances a new paradigm—the urban ecosystem—for understanding the city's complex and unpredictable waterways and other issues that are sure to play a large role in future planning.
eBook
Water Governance in the Netherlands
This report assesses the extent to which Dutch water governance is fit for future challenges and sketches an agenda for the reform of water policies in the Netherlands. It builds on a one-year policy dialogue with over 100 Dutch stakeholders, supported by robust analytical work and drawing on international best practice.
eBook
Land, Water and Development
This is a fully revised and expanded second edition of Malcolm Newson's acclaimed book. Exploring in greater depth the meaning of sustainability in river basin development this new edition: * highlights the rapid evolution of practical concepts since the Rio Earth Summit * features new illustrations and case studies from Australia, South Africa and Israel * makes the ecosystem model more explicit throughout * strengthens coverage of the linkages between land and water management.
eBook
Toward sustainability: soil and water research priorities for developing countries
How can high-growth areas such as Africa, Asia, and Latin America sustain agricultural production for current and future generations? Toward Sustainability explores research priorities to support sustainable agriculture. The book identifies six areas that could offer great rewards: addressing institutional constraints on resource conservation, enhancing soil biological processes, managing soil properties, improving water resource management, matching crops to environments, and effectively incorporating social and cultural dimensions into research.Also highlighted is the importance of developing collaborative, integrated research strategies and flexible mechanisms to periodically evaluate and reassess research priorities.
eBook
Rethinking water management
If water resources are to be distributed efficiently, equitably and cost-effectively in this rapidly changing world, then it is clear that current water management practices are no longer feasible. Innovative approaches are required to meet the increasing water demands of a growing world population and economy and the needs of the ecosystems supporting them.
New approaches have to be employed at global, national and local levels. In Rethinking Water Management, a new generation of water experts from around the world examine the critical challenges confronting the water profession, including rainwater and groundwater management, recycling and reuse, water rights, transboundary access to water and financing of water. They offer important new perspectives on the use, management and conservation of fresh water, in terms of both quantity and quality, for the domestic, agricultural and industrial sectors, and show how a new set of paradigms can be applied to successfully manage water for the future.
Caroline Figueres is Head of the Urban Infrastructure Department at UNESCO-IHE Water Education Institute in The Netherlands. Cecilia Tortajada is Vice President of the Third World Centre for Water Management in Mexico and Vice President-elect of the International Water Resources Association. Johan Rockström is Water Resources Expert at UNESCO-IHE.
eBook