Modern water management aims for sustainability of water use in evolving socioeconomic and environmental scenarios, nevertheless under great defies. In Mediterranean environments such as Chile and California, climate change, droughts, floods, and increasing water demand are challenging our sustainability on water use. As spring arrives early and highland precipitation is frequently rain-on-snow, the snowpack melts sooner, more water runoff in rivers, reservoirs quickly reach capacity, and water is released for flood control. This uncaptured water becomes available across lowland streams and floodplains, away from upgradient areas where recharge normally occurs, and is eventually lost downstream, unless we can store it underground. Moreover, groundwater is not managed very effectively, causing overdrafts and subsidence. If changes in groundwater storage, pumping, and recharge could be tracked in real time, feedback could be provided to water users to minimize undesirable effects. However, groundwater accounting is difficult, done by complex models, and costly in terms of data, money and time. Thus, this research aims to address (1) how the increased early streamflows can be managed in floodplains to maximize recharge in downgradient areas compensating for the loss of surface water storage? and (2) how can dynamics in groundwater be tracked in real time to improve management and transparency? To conduct this work, an existing IWFM (Integrated Water Flow Model) for Yolo County, California, was updated, calibrated, and used as study case. Results presented a promising conjunctive use framework in the Yolo Bypass, a lowland floodplain environment, by recharging Sacramento River excess water, along with a regional pumping scheme to facilitate recharge. Also, hydrologic proxy models are presented to estimate instantly change in storage, pumping, and recharge, with minimum calculations and data. For similar settings, these results can serve water users and managers to enhance water supply and accounting, in order to make well informed decisions for sustainable water use.

2 DANNY D. REIBLEI AND KATERINA DEMNEROVA 1 Hazardous Substance Research Center/South and Southwest, Louisiana State University, Baton Rouge, LA 70803 2 Department of Biochemistry and Microbiology, Institute of Chemical Technology, Prague, Czech Republic On May 24, 2001, a total of 102 students and lecturers participated in an Advanced Study Institute (ASI) sponsored by the North Atlantic Treaty Organization (NATO) under our direction. The Institute was focused on in situ and onsite management of contaminated sites. The objective of the Institute was to balance state of the art science with techniques for field application of a variety of technologies for in situ assessment and remediation of contaminated sites. Many of the lecturers were drawn from the ranks of the Hazardous Substance Research Centers, multi-university consortia that have been funded by the US Environmental Protection Agency to conduct research and technology transfer designed to promote risk-based management and control of hazardous substances for the nation. The Centers have made special contributions to the areas of in situ and onsite assessment and remediation of contaminated sites. Such approaches have the potential for being significantly less expensive than other assessment and remediation approaches while maintaining accuracy and effectiveness. Cost-effective remedial and management approaches that are also effective in minimizing exposure and risk to human health and the environment are a critical need throughout the world but particularly in Eastern Europe and the former Soviet Union where resources that can be devoted to environmental cleanup are especially limited.

Released every three years since March 2003, the United Nations World Water Development Report (WWDR), a flagship UN-Water report published by UNESCO, has become the voice of the United Nations system in terms of the state, use and management of the world's freshwater resources. The report is primarily targeted at national decision-makers and water resource managers, but is also aimed at educating and informing a broader audience, from governments to the private sector and civil society. It underlines the important roles water plays in all social, economic and environmental decisions, highlighting policy implications across various sectors, from local and municipal to regional and international levels. Similarly to the first two editions, this report includes a comprehensive and up-to-date assessment of several key challenge areas, such as water for food, energy and human health, and governance challenges such as institutional reform, knowledge and capacity-building, and financing, each produced by individual UN agencies.

The System of Environmental-Economic Accounting for Water, commonly referred to as SEEA-Water, is a conceptual framework for the organization of physical and economic information, developed with the purpose of providing an integrated conceptual framework to support water policy design and evaluation. It uses concepts, definitions and classifications coherent with those of the System of National Accounts. SEEA-Water is a subsystem of the System of Environmental-Economic Accounting (SEEA), which provides internationally agreed standards for the compilation of measures about the environment and its interactions with the economy. After a rigorous consultation process, SEEA-Water was adopted in 2007 by the United Nations Statistical Commission (UNSC). Part I of SEEA-Water has been adopted as an interim international statistical standard subject to re-evaluation when the SEEA is adopted as an international statistical standard.

Because water in the United State has not been traded in markets, there is no meaningful estimate of what it would cost if it were traded. But failing to establish ground water's valueâ€"for in situ uses such as sustaining wetlands as well as for extractive uses such as agricultureâ€"will lead to continued overuse and degradation of the nation's aquifers. In Valuing Ground Water an interdisciplinary committee integrates the latest economic, legal, and physical knowledge about ground water and methods for valuing this resource, making it comprehensible to decision-makers involved in Superfund cleanup efforts, local wellhead protection programs, water allocation, and other water-related management issues. Using the concept of total economic value, this volume provides a framework for calculating the economic value of ground water and evaluating tradeoffs between competing uses of it. Included are seven case studies where ground-water valuation has been or could be used in decisionmaking. The committee examines trends in ground-water management, factors that contribute to its value, and issues surrounding ground-water allocation and legal rights to its use. The book discusses economic valuation of natural resources and reviews several valuation methods. Presenting conclusions, recommendations, and research priorities, Valuing Ground Water will be of interest to those concerned about ground-water issues: policymakers, regulators, economists, attorneys, researchers, resource managers, and environmental advocates.

This book is a useful guide to employing remote sensing data to explain and illustrate interactions between atmospheric, oceanic and hydrological processes, incorporating the latest developments in the field. A number of applications, such as water resources management, environmental monitoring, climate prediction, agriculture, and preparation

This report aims at integrating regional and country experiences and projects with regard to viable groundwater management practices for the future. It compiles and translates best available present scientific and technical knowledge on groundwater resources and their governance, which is often highly specialized, into simpler language and synoptic representations, accessible to a large public of policy and decision makers across development sectors. It serves as a technical basis for the visioning process, and for the definition of the Framework for Action on groundwater governance.This is one of 3 outputs of project GCP/GLO/277/GEF expected to be published under the names of its 5 partner organizations and widely circulated to policy and decision-makers in countries, as well as other stakeholders of groundwater governance and practionners around the world. This outputs provides the technical basis for the other two: A Global Vision for Groundwater Governance 2030 and Global Framework for Action to Achieve the Vision on Groundwater Governance.