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Comparing futures for the Sacramento-San Joaquin Delta
An ecosystem in freefall, a shrinking water supply for cities and agriculture, an antiquated network of failure-prone levees—this is the Sacramento-San Joaquin Delta, the major hub of California's water system. Written by a team of independent water experts, this analysis of the latest data evaluates proposed solutions to the Delta's myriad problems. Through in-depth economic and ecological analysis, the authors find that the current policy of channeling water exports through the Delta is not sustainable for any interest. Employing a peripheral canal-conveying water around the Delta instead of through it—as part of a larger habitat and water management plan appears to be the best strategy to maintain both a high-quality water supply and at the same time improve conditions for native fish and wildlife. This important assessment includes integrated analysis of long term ecosystem and water management options and demonstrates how issues such as climate change and sustainability will shape the future.
eBook
Modelling the impact of climate change on water resources
The quantitative assessment of the impact of climate change on water availability and water resources management requires knowledge of climate, hydro(geo)logical and water resources models, and particularly the relationships between each of them. This book brings together world experts on each of these aspects, distilling each complex topic into concise and easy to understand chapters, in which both the uses and limitations of modelling are explored. The book concludes with a set of case studies using real-life examples to illustrate the steps required and the problems that can be faced in assessing the potential impacts of climate change on water resource systems. For students, scientists, engineers and decision-makers alike, this book provides an invaluable and critical look at the information that is provided by climate models, and the ways it is used in modelling water systems. A key focus is the exploration of how uncertainties may accrue at each stage of an impacts assessment, and the reliability of the resulting information. The book is a practical guide to understanding the opportunities and pitfalls in the quantitative assessment of climate change impacts and adaptation in the water resource sector.
eBook
Short-Term Water Supply Forecasting for Water Treatment Plant Using Temporal Multi-Scale Features
Forecasting the water supply of a water treatment plant is an important management and decision-making task in the water treatment system. Currently, most studies in this field do not consider the problems brought about by the time scale when selecting the input feature set. Therefore, this study explores how to select the relevant input feature set and model for the ultra-short-term water demand forecasting (UWDF) of water treatment plants from the perspective of time multi-scale features, in order to provide more accurate and effective water supply planning for water treatment plants. This study uses feature engineering to analyze the importance of relevant features affecting water supply, and compares and analyzes the predictive capabilities of seven deep learning models. The experimental results show that the time multi-scale features (TMFs) extracted from the historical water supply data play an important role in the prediction of ultra-short-term water supply, and the LSTM model performs better in the prediction task, with a mean absolute percentage error (MAPE) of 5.3530% and a goodness-of-fit (R2) of 0.9981. This study provides an effective method for intelligent operation and maintenance in the field of water treatment, and has broad application prospects.
Journal Article
Forecasting urban water demand
Intro -- CONTENTS -- LIST OF TABLES -- INTRODUCTION -- ACKNOWLEDGMENTS -- GLOSSARY -- Index.
Book
STRIKING PEACE on troubled Waters
There is no denying the potential violence surrounding the current water crisis. About 40% of the world's population live in river basins shared by two or more countries. These basins comprise more than 50% of Earth's landmass.
Journal Article
U.S. Research Advances Sustainable Water Use in Agriculture
\"The 2012 drought in the U.S. Midwest affected both farmers in the region and consumers halfway around the world who rely on U.S. grain exports, according to a noted water management and development expert...The world's population is expected to increase 40 percent by 2050 and double its demand for food. Increased incomes in growing economies also mean increased demand for protein, which requires more water to produce.\" (AllAfrica.com) In this article, the author explains how the 2012 drought has affected crops and farmers across the U.S. Midwest. It is considered one of the worst droughts in 50 years in the U.S.
Newspaper Article
Estimate of Recharge of a Rising Water Table in Semiarid Niger from 3H and 14C Modeling
A hydrodynamic survey carried out in semiarid southwest Niger revealed an increase in the unconfined ground water reserves of approximately 10% over the last 50 years due to the clearing of native vegetation. Isotopic samplings (3H, 18O,2H for water and 14C, 13C for the dissolved inorganic carbon) were performed on about 3500 km2 of this silty aquifer to characterize recharge. Stable isotope analyses confirmed the indirect recharge process that had already been shown by hydrodynamic surveys and suggested the tracers are exclusively of atmospheric origin. An analytical model that takes into account the long‐term rise in the water table was used to interpret 3H and 14C contents in ground water. The natural, preclearing median annual renewal rate (i.e., recharge as a fraction of the saturated aquifer volume) lies between 0.04% and 0.06%. For representative characteristics of the aquifer (30 m of saturated thickness, porosity between 10% and 25%), this implies a recharge of between 1 and 5 mm/year, which is much lower than the estimates of 20 to 50 mm/year for recent years, obtained using hydrological and hydrodynamic methods and the same aquifer parameters. Our study, therefore, reveals that land clearing in semiarid Niger increased ground water recharge by about one order of magnitude.
Journal Article