Water

Progress has been made since the passage of the Safe Drinking Water Act of 1974 towards indentifying the major organic contaminants in drinking water and in assessing their hygienic significance. However, basic questions remain with respect to the possible occurence of waterborne organic contaminants not identified to date, their fundamental processes and conditions related to their formation and persistance and their removal by treatment technology. These complex issues require expertise in a variety of disciplines including chemistry engineering, epidemiology, toxicology and environmental law. In this book, a knowledge of these disciplines is brought to bear on the chemical phenomena affecting the formation and identification of these contaminants, the health considerations arising from the presence of such substances in our drinking water and the treatment and regulatory approaches in use under consideration.

A comprehensive engineering guide to theory and design practices for the control, utilization, and management of water in agriculture, with emphasis on scientific principles. Integrates into a single volume engineering practices for solving problems relating to erosion control, flood control, drainage, and irrigation. Presents information on precipitation, infiltration, evapotranspiration, and runoff, in addition to providing the entire design data for the U.S., plus a wide range of its applications. Contains conversion tables from English units to SI, and SI to English units, as well as numerous example problems, illustrations, and appendix.

As we approach the twenty-first century, we are entering a new era-an era of water scarcity.

This new expanded edition of Microbiology for Water/Wastewater Operators augments previous information and emphasizes the new world order of water control based on microbiological principles and practices. Microbiology for Water/Wastewater Operators…
* Explains microbes that threaten health
* Links microbes to operator activities and collection procedures
* Covers giardia and cryptosporidia
* Useful for understanding organisms in activated sludge

User-friendly and understandable, Microbiology for Water/Wastewater Operators provides operators with need to know information about microbiology fundamentals and applications. This new resource is also a basic study tool by water/wastewater personnel preparing for their licensing examinations, or as a supplemental text in undergraduate or graduate courses in aquatic ecology, water/wastewater pollution control and in environmental science courses dealing with water biology.

Microbiology for Water/Wastewater Operators is . . .
* What operators need to know about microbiology fundamentals and applications
* User-friendly, understandable-assumes no special prior knowledge
* A troubleshooting handbook for activated sludge system personnel
* A study guide for water/wastewater licensing exams

This text shows how to set about the institutional development of the organizations necessary for monitoring and regulating rural water supplies. It discusses the new cost-effective approach to sanitary inspection of community water supplies and provides proposals for national guidelines for planning and implementing programmes of staff training. It reveals some of the critical technical, social and managerial errors which have been made in the past, describing the essential minimum of reliable methods for monitoring water quality. The authors provide proposals for developing countries which are now beginning to implement surveillance of drinking water quality.

The ocean is the ultimate sink for all liquid waste and has for many years been the recipient of both treated and untreated sewage waste. This book offers a comprehensive study on the subject of ocean disposal of these effluents. The early chapters cover the philosophy of outfall design, properties of sewage from developed towns and an overview of water quality regulations in New Zealand, Great Britain and the U.S. Alternative ways of satisfying these regulations are discussed. The book also provides information required to design outfall pipelines and diffusers. The methods of calculating the initial dilution and the investigations necessary to compute the further dispersion of the effluent are discussed. A brief discussion of the problems of salt water intrusion, of outfall construction and post construction monitoring is presented at the end of the book.

This selective collection of papers represents the results of an international conference on the conservation and management of rivers, held at York University in September 1990. Topics include philosophy of conservation, catchment characteristics and river ecosystems, threats to river systems, the value of protection, the integration of habitat and wildlife conservation, river classification, management and protection by legislation.

In order to provide water security in the twenty-first century, there is universal agreement that a continuation of current policies and extrapolation of trends is not an option. Also clear is that from both water supply and development perspectives, the world's arid and semi-arid regions are those currently and potentially experiencing the highest water stresses. One third of the world's land surface is classified as arid or semi-arid, and about half of all countries are directly affected in some way by problems of aridity. The hydrology of arid and semi-arid areas is also known to be substantially different from that in more humid regions. It is therefore essential that investigation methods appropriate to the former are developed and applied, and that strategies for arid and semi-arid region water resources development recognise the principal characteristics of in-situ hydrological processes.