نتایج جستجو برای: hoor al azim wetland
تعداد نتایج: 452938 فیلتر نتایج به سال:
The importance of Ireland’s wetlands for waterbirds is well documented (Crowe 2005, Boland & Crowe 2012), and the most recent population estimates indicate that more than one million wildfowl and waders winter in Ireland (Crowe et al. 2008). The Wetland Bird Survey (WeBS) in Northern Ireland and Britain, together with the equivalent scheme in the Republic of Ireland, the Irish Wetland Bird Surv...
Midwest by converting upland and wetland habitats to crops and pastures, simultaneously changing hydrologic conditions and water quality, and threatening the region’s biodiversity (Table 1). Where corn is the dominant crop (in Iowa, Illinois, and Indiana, in particular), extensive networks of perforated pipes and drainage ditches were installed to drain wetlands. As a result, surface and ground...
Observations of short-circuiting flow paths within a free-surface wetland in Augusta, Georgia, U.S.A
Velocity heterogeneity is characteristic of wetland systems and results in some influent water remaining in the wetland for less than the expected residence time on the basis of volume and flow rate. This phenomenon, known as short-circuiting, alters the distribution of the chemical and biological transformations that occur within the wetland. Field observations in a 1.5-km2 constructed treatme...
â â â â narration elements in the story of mousa and khezr â (based on character and time) â â sayyed reza solayman zadeh najafi * â azim tahmasbi ** â â abstract â â the story consists of elements such as character and time and the story features. characters make storyâs structure and there is not story without character . time element is also necessary for the story . each story...
This extension note describes the basic ecological features of wetland ecosystems. It is a foundational document that provides important concepts and background information to be applied in future extension notes on wetland management. Major topics and concepts covered in this document are: • definition of a wetland ecosystem and comparison of characteristics with other related ecosystems, • re...
Methane is one of the important greenhouse gases and plays an important role in atmospheric chemistry. Its contribution to the current greenhouse effect is about 22%. Since the beginning of the industrialization the atmospheric methane concentration has increased by a factor of 2.5. This increase continues until present, however, since the early 1990s the growth rate has decreased. Superimposed...
INTRODUCTION Methane is a highly efficient greenhouse gas, approximately 21 times more effective than CO2 at trapping infrared radiation from Earth (Seinfeld and Pandis, 2006). Although the importance of methane in the climate system is recognized, its global budget is poorly constrained. The atmospheric reservoir is easily estimated using measured methane concentrations; residence time and pri...
Wetlands are the world’s largest natural source of methane, a powerful greenhouse gas. The strong sensitivity of methane emissions to environmental factors such as soil temperature and moisture has led to concerns about potential positive feedbacks to climate change. This risk is particularly relevant at high latitudes, which have experienced pronounced warming and where thawing permafrost coul...
KLEMAS, V., 2011. Remote sensing of wetlands: case studies comparing practical techniques. Journal of Coastal Research, 27(3), 418–427. West Palm Beach (Florida), ISSN 0749-0208. To plan for wetland protection and sensible coastal development, scientists and managers need to monitor the changes in coastal wetlands as the sea level continues to rise and the coastal population keeps expanding. Ad...
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