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Books > Earth & environment > Geography > Physical geography > General
The purpose of this report is to (1) compare the extent and duration of the flooded area in isolated wetlands located in three regional well fields operated by Tampa Bay Water in the northern Tampa Bay region during a period before and a period after reductions in the rate of groundwater withdrawals; (2) evaluate the ability of the flooded area duration integrated over the two periods to provide evidence of the change in wetland hydrologic conditions; and (3) discuss the potential use of wetland flooded-area data to interpret long-term wetland vegetation monitoring data.
The U.S. Geological Survey Puget Sound Ecosystem Portfolio Model is a decisions-support tool that uses scenarios to evaluate where, when, and to what extend future population growth, urban growth, and shoreline development may threaten the Puget Sound nearshore environment.
The first such dictionary since that of Platner and Ashby in 1929, "A New Topographical Dictionary of Ancient Rome" defines and describes the known buildings and monuments, as well as the geographical and topographical features, of ancient Rome. It provides a concise history of each, with measurements, dates, and citations of significant ancient and modern sources.
Threshold concepts are used in research and management of ecological systems to describe and interpret abrupt and persistent reorganization of ecosystem properties (Walker and Meyers, 2004; Groffman and others, 2006). Abrupt change, referred to as a threshold crossing, and the progression of reorganization can be triggered by one or more interactive disturbances such as land-use activities and climatic events (Paine and others, 1998). Threshold crossings occur when feedback mechanisms that typically absorb forces of change are replaced with those that promote development of alternative equilibria or states (Suding and others, 2004; Walker and Meyers, 2004; Briske and others, 2008). The alternative states that emerge from a threshold crossing vary and often exhibit reduced ecological integrity and value in terms of management goals relative to the original or reference system. Alternative stable states with some limited residual properties of the original system may develop along the progression after a crossing; an eventual outcome may be the complete loss of pre-threshold properties of the original ecosystem.
In 2012, the FAA and USDA continued to make great progress with its multifaceted approach for mitigating wildlife strikes. The FAA ensured that 100 percent of Part 139 airports have completed a Wildlife Hazard Assessment (WHA), are in the process of conducting a WHA, or have taken a Federal grant to conduct a WHA. Strike reporting continued to increase, especially with General Aviation (GA) aircraft, which increased strike reporting by 11 percent between 2011 and 2012. The FAA implemented three performance metrics to monitor strike reporting trends and GA wildlife mitigation. The performance metrics include percentage of damaging strikes, strike reporting rates, and tracking of General Aviation (GA) airports that conduct WHAs and site visits. We also issued a final Advisory Circular (AC) on strike reporting and draft ACs on WHA methodology and requirements for federally obligated public airports to conduct WHAs.
Urban Climates is the first full synthesis of modern scientific and applied research on urban climates. The book begins with an outline of what constitutes an urban ecosystem. It develops a comprehensive terminology for the subject using scale and surface classification as key constructs. It explains the physical principles governing the creation of distinct urban climates, such as airflow around buildings, the heat island, precipitation modification and air pollution, and it then illustrates how this knowledge can be applied to moderate the undesirable consequences of urban development and help create more sustainable and resilient cities. With urban climate science now a fully-fledged field, this timely book fulfills the need to bring together the disparate parts of climate research on cities into a coherent framework. It is an ideal resource for students and researchers in fields such as climatology, urban hydrology, air quality, environmental engineering and urban design.
This abstract describes the Final Management Plan and Environmental Impact Statement for the Florida Keys National Marine Sanctuary. Congress, recognizing the degradation of this unique ecosystem due to direct physical impacts and indirect impact, passed the Florida Keys National Marine Sanctuary and Protection Act of 1990 designating the Florida Keys National Marine Sanctuary.
The myriad definitions of soil/ecosystem quality or health are often driven by ecosystem and management concerns, and they typically focus on the ability of the soil to provide functions relating to biological productivity and/or environmental quality (Doran and Parkin, 1994; Karlen and others, 1997). A variety of attempts have been made to create indices that quantify the complexities of soil quality and provide a means of evaluating the impact of various natural and anthropogenic disturbances.
A Kind of Magic is a three-volume novel of eco-magical realism. It's a book about transition: from childhood to adolescence; from isolation to community; from passivity to action. From fantasy to the real world. It is deliberately aimed at 4th - 6th graders, and can be read as a whole or as three short school library books. A Trick of the Light/Turtle Crossing/ThunderHawk: A Trilogy of short books for middle-grade readers; following a boy's awakening to the beauties and needs of the natural world around him, with the help of his friends, his family, his community and the mysterious spirit of the forest.
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