Monongahela River Navigation System Locks and Dam 7-8 Feasibility Study (PA,WV)
Author:
Publisher:
Published: 1984
Total Pages: 776
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author:
Publisher:
Published: 1984
Total Pages: 776
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1989
Total Pages: 1672
ISBN-13:
DOWNLOAD EBOOKAuthor: Us Army Corps Of Engineers
Publisher: Military Bookshop
Published: 1995-06
Total Pages: 192
ISBN-13: 9781780397603
DOWNLOAD EBOOKThis manual provides guidance on evaluating the condition of the concrete in a structure, relating the condition of the concrete to the underlying cause or causes of that condition, selecting an appropriate repair material and method for any deficiency found, and using the selected materials and methods to repair or rehabilitate the structure. Guidance is also included on maintenance of concrete and on preparation of concrete investigation reports for repair and rehabilitation projects. Considerations for certain specialized types of rehabilitation projects are also given.
Author: Pradeep K. Aggarwal
Publisher: Springer Science & Business Media
Published: 2006-01-16
Total Pages: 377
ISBN-13: 1402030231
DOWNLOAD EBOOKEnvironmental isotope and nuclear techniques provide unmatched insights into the processes governing the water cycle and its variability. This monograph presents state of the art applications and new developments of isotopes in hydrology, environmental disciplines and climate change studies. Coverage ranges from the assessment of groundwater resources in terms of recharge and flow regime to studies of the past and present global environmental and climate changes.
Author: Milton Bernhard Trautman
Publisher:
Published: 1981
Total Pages: 824
ISBN-13:
DOWNLOAD EBOOKThis book documents historical changes in fish distribution in the face of man's encroachment and alteration of aquatic ecosystems.
Author: Leland R. Johnson
Publisher:
Published: 1979
Total Pages: 396
ISBN-13:
DOWNLOAD EBOOKAuthor: Ohio River Basin Commission
Publisher:
Published: 1979
Total Pages: 112
ISBN-13:
DOWNLOAD EBOOKAuthor: Wenfei Tong
Publisher:
Published: 2020-03-03
Total Pages: 195
ISBN-13: 1782407480
DOWNLOAD EBOOKExploring the sex life of birds and their wide range of fascinating mating and parenting habits, this comprehensive study gives you a detailed insight into bird family life. Discover the amazing array of courtship techniques employed by birds around the world, such as ospreys bringing gifts of food in exchange for sex, male skylarks performing aerial acrobatics to impress females, or long-tailed widowbirds showing off their tails to advertise the quality of their genes. But it's not all about males seeking to impress or dominate females: sex roles can be reversed, and the book includes examples such as the black coucal, whose females leave the males to perform all childcare duties. The essential guide to bird family life, Bird Love is richly illustrated with stunning colour photographs, and regular Backyard Bird boxes in each chapter showcase familiar species from around the world. There is also an index and further reading at the back of the book for those wanting to learn more about the many different species of birds in this book! Bird Love covers a whole host of unique bird mating and parenting habits, from practical to peculiar, and is divided into sections on: Ecology and Mating Systems, Courtship, Nests and Eggs, Raising Chicks, Sex Role Reversals, Group Breeding, Brood Parasitism. From female hornbills who seal themselves in to their tree hollow nests, relying on their mates to deliver food through a narrow slit, to the eclectus parrots of Melanesia, whose females fight each other to secure a home due to the limited availability of nesting spots, and who can if succesful enjoy up to seven mates, this book is filled with wild stories of the lengths birds will go to survive and thrive in the wild. Varying levels of parental care are revealed, from both parents having to provide constant care to allowing an insurance chick to die to ensure at least one survives. And either sex can desert the nest in search of further matings to secure another clutch of chicks and the continuation of their family line. Brood parasitism, where birds such as cuckoos and cowbirds lay their eggs in other birds' nests, takes absentee parenting to the extreme and the book explores how these species have evolved to delegate all parental care. Alongside, it also shows how host species have cleverly developed a wide range of tactics to defend their nests and their own families. This complete guide is the ultimate study in the mating and parenting lives of birds of all kinds, and is the perfect gift for either a seasoned ornithologist or an amateur bird fancier. Stunning photographs accompany the deep scientific knowledge of author Wenfei Tong, making this a must have for anyone interestered in avian life!
Author: William S. Clark
Publisher: Princeton University Press
Published: 2017-03-28
Total Pages: 305
ISBN-13: 1400885078
DOWNLOAD EBOOKThe essential field guide to the raptors of Mexico and Central America Raptors are among the most challenging birds to identify in the field due to their bewildering variability of plumage, flight silhouettes, and behavior. Raptors of Mexico and Central America is the first illustrated guide to the region's 69 species of raptors, including vagrants. It features 32 stunning color plates and 213 color photos, and a distribution map for each regularly occurring species. Detailed species accounts describe key identification features, age-related plumages, status and distribution, subspecies, molt, habitats, behaviors, potential confusion species, and more. Raptors of Mexico and Central America is the essential field guide to this difficult bird group and the ideal travel companion for anyone visiting this region of the world. Covers all 69 species of raptors found in Mexico and Central America Features 32 color plates and hundreds of color photos Provides multiple illustrations of each species Depicts and describes variations in plumage by individual, morph, age, and region Describes behavior, food preferences, hunting strategies, vocalizations, and molt Covers rare and extralimital species Includes distribution maps and flight silhouettes
Author: Elias Jones
Publisher:
Published: 1923
Total Pages: 426
ISBN-13:
DOWNLOAD EBOOK