Техническоя литература, Только здесь ссылки на библиотеки Опции

[Toll]

Библиотека технической и научной тематики
http://eKnigu.com - компьютерные науки, инженерные, физика, математика и т.п. Книги в форматах DjVu, PDF, ps.gz.

Сообщение отредактировал Toll - 26.04.2007 - 23:35

[Williams]

Thomas C. Winter, Judson W. Harvey, O. Lehn Franke, William M. Alley -
Ground Water and Surface Water A Single Resource
U.S. Geological Survey Circular 1139

U.S. GOVERNMENT PRINTING OFFICE, 1998
pdf, 87 pages, english
ISBN 0–607–89339–7



As the Nation's concerns over water resources and the environment increase, the importance of considering ground water and surface water as a single resource has become increasingly evident. Issues related to water supply, water quality, and degradation of aquatic environments are reported on frequently. The interaction of ground water and surface water has been shown to be a significant concern in many of these issues. For example, contaminated aquifers that discharge to streams can result in long-term contamination of surface water; conversely, streams can be a major source of contamination to aquifers. Surface water commonly is hydraulically connected to ground water, but the interactions are difficult to observe and measure and commonly have been ignored in water-management considerations and policies. Many natural processes and human activities affect the interactions of ground water and surface water. The purpose of this report is to present our current understanding of these processes and activities as well as limitations in our knowledge and ability to characterize them.

link.
11 Mb (RAR5, incl. 3% - info for restoration purpose)