Автор: Williams
Дата: 26 апреля 2016
Просмотров: 1 602
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.
Автор: Williams
Дата: 26 апреля 2016
Просмотров: 813
GlobalCAD Organizer 2016 v1.2
GlobalCAD Organizer gives you tools to create and manage design content for maximum results! GlobalCAD Organizer gives you the tools to create and manage drawing objects like never before! Its unique object-authoring suite includes Block Manager, Hatch Manager, Linetype Wizard and Attribute Wizard. Now you can instantly publish intelligent block libraries, stunning hatch patterns and complex linetypes from existing drawing content. With GlobalCAD Organizer, objects are organized within distinct libraries with advanced viewing capabilities. They can be identified fast and are accessible right when you need them. Management tools ensure the library database is always up to date, with the ability to view and print library content and other details. Objects including blocks and hatch patterns can be contained on local drives or on a network.