Stream Corridor Restoration
Stream Corridor Restoration

Author:

Publisher: National Technical Info Svc

Published: 1998

Total Pages: 648

ISBN-13:

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This document is a cooperative effort among fifteen Federal agencies and partners to produce a common reference on stream corridor restoration. It responds to a growing national and international interest in restoring stream corridors.

Effective Groundwater Model Calibration
Effective Groundwater Model Calibration

Author: Mary C. Hill

Publisher: John Wiley & Sons

Published: 2006-08-25

Total Pages: 475

ISBN-13: 0470041072

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Methods and guidelines for developing and using mathematical models Turn to Effective Groundwater Model Calibration for a set of methods and guidelines that can help produce more accurate and transparent mathematical models. The models can represent groundwater flow and transport and other natural and engineered systems. Use this book and its extensive exercises to learn methods to fully exploit the data on hand, maximize the model's potential, and troubleshoot any problems that arise. Use the methods to perform: Sensitivity analysis to evaluate the information content of data Data assessment to identify (a) existing measurements that dominate model development and predictions and (b) potential measurements likely to improve the reliability of predictions Calibration to develop models that are consistent with the data in an optimal manner Uncertainty evaluation to quantify and communicate errors in simulated results that are often used to make important societal decisions Most of the methods are based on linear and nonlinear regression theory. Fourteen guidelines show the reader how to use the methods advantageously in practical situations. Exercises focus on a groundwater flow system and management problem, enabling readers to apply all the methods presented in the text. The exercises can be completed using the material provided in the book, or as hands-on computer exercises using instructions and files available on the text's accompanying Web site. Throughout the book, the authors stress the need for valid statistical concepts and easily understood presentation methods required to achieve well-tested, transparent models. Most of the examples and all of the exercises focus on simulating groundwater systems; other examples come from surface-water hydrology and geophysics. The methods and guidelines in the text are broadly applicable and can be used by students, researchers, and engineers to simulate many kinds systems.

A Season on the Wind
A Season on the Wind

Author: Kenn Kaufman

Publisher: HarperCollins

Published: 2019-04-02

Total Pages: 301

ISBN-13: 1328566765

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A close look at one season in one key site that reveals the amazing science and magic of spring bird migration, and the perils of human encroachment. Every spring, billions of birds sweep north, driven by ancient instincts to return to their breeding grounds. This vast parade often goes unnoticed, except in a few places where these small travelers concentrate in large numbers. One such place is along Lake Erie in northwestern Ohio. There, the peak of spring migration is so spectacular that it attracts bird watchers from around the globe, culminating in one of the world’s biggest birding festivals. Millions of winged migrants pass through the region, some traveling thousands of miles, performing epic feats of endurance and navigating with stunning accuracy. Now climate change threatens to disrupt patterns of migration and the delicate balance between birds, seasons, and habitats. But wind farms—popular as green energy sources—can be disastrous for birds if built in the wrong places. This is a fascinating and urgent study of the complex issues that affect bird migration.

Cheyenne Birds by the Month
Cheyenne Birds by the Month

Author: Barb Gorges

Publisher: Barbara Ann Gorges, DBA Yucca Road Press

Published: 2019-02-21

Total Pages: 148

ISBN-13: 9780999294543

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Two of Cheyenne, Wyoming's well-known birdwatchers have collaborated on this celebration of 104 of the Capitol City's most-likely-to-be-seen birds. Photographer Pete Arnold, often found birding local hotspots camera at the ready, shares his art. Author Barb Gorges, bird columnist for the Wyoming Tribune Eagle for 20 years, shares insights into avian residents and visitors.Each of Pete Arnold's 6 by 6-inch bird photos is accompanied by 80-100 words by Barb Gorges about the species. She gives the reader a general impression of the bird from her experience birding Cheyenne for 30 years, plus interesting tidbits about behavior that might be observed in the month the bird is featured.Included is a checklist of all 326 bird species that may be seen in the Cheyenne area with information about what time of year and how easily they may be seen. There's also a list of birdwatching resources and the American Birding Association's Code of Birding Ethics.In the introduction Barb Gorges explains the genesis of the book as "Bird of the Week" blurbs for the Wyoming Tribune Eagle and thanks birding mentors and contributors to the book in the Acknowledgements. In "A Word from the Photographer," Pete Arnold writes about his fascination with photography and birds. Book designer Chris Hoffmeister, Western Sky Design, introduces each month with a chapter title page featuring a patchwork of closeups of the featured birds. While the book is not intended as a field guide, scanning these pages may help with quicker bird identification.

A Concise History of the U.S. Air Force
A Concise History of the U.S. Air Force

Author: Stephen Lee McFarland

Publisher: Createspace Independent Publishing Platform

Published: 1997

Total Pages: 96

ISBN-13:

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Except in a few instances, since World War II no American soldier or sailor has been attacked by enemy air power. Conversely, no enemy soldier orsailor has acted in combat without being attacked or at least threatened by American air power. Aviators have brought the air weapon to bear against enemies while denying them the same prerogative. This is the legacy of the U.S. AirForce, purchased at great cost in both human and material resources.More often than not, aerial pioneers had to fight technological ignorance, bureaucratic opposition, public apathy, and disagreement over purpose.Every step in the evolution of air power led into new and untrodden territory, driven by humanitarian impulses; by the search for higher, faster, and farther flight; or by the conviction that the air way was the best way. Warriors have always coveted the high ground. If technology permitted them to reach it, men, women andan air force held and exploited it-from Thomas Selfridge, first among so many who gave that "last full measure of devotion"; to Women's Airforce Service Pilot Ann Baumgartner, who broke social barriers to become the first Americanwoman to pilot a jet; to Benjamin Davis, who broke racial barriers to become the first African American to command a flying group; to Chuck Yeager, a one-time non-commissioned flight officer who was the first to exceed the speed of sound; to John Levitow, who earned the Medal of Honor by throwing himself over a live flare to save his gunship crew; to John Warden, who began a revolution in air power thought and strategy that was put to spectacular use in the Gulf War.Industrialization has brought total war and air power has brought the means to overfly an enemy's defenses and attack its sources of power directly. Americans have perceived air power from the start as a more efficient means of waging war and as a symbol of the nation's commitment to technology to master challenges, minimize casualties, and defeat adversaries.