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Metamorphosis
Published in Debleena Bhattacharya, V K Singh, Climate Changes and Epidemiological Hotspots, 2022
Debleena Bhattacharya, V K Singh
These wetlands play an important role in climate changes because they augment the capacity to modulate atmospheric concentrations of greenhouse gases (GHGs) such as methane,CO2 and NO2, which are dominant GHGs contributing about 60%, 20% and 6% of the global warm potential (IPCC, 2007). Wetlands play the role of an important environmental resource as they act as an atmospheric carbon sink that stabilises the climate. They purify the wastewater in a natural way and therefore reduce the use of conventional methods of treatment which uses chemicals and consumes energy for manifesting the treatment process.
Treatment of Nonpoint Source Pollutants– Urban Runoff and Agricultural Wastes
Published in Donald A. Hammer, Constructed Wetlands for Wastewater Treatment, 2020
A 20-ha fallow agricultural field in Fremont (Alameda County), California was converted into a seasonal freshwater wetlands. Impetus for constructing this system was multiobjective, but driven by recognition that urban stormwater runoff is a significant pollution source to San Francisco Bay. Developing wetlands to treat urban stormwater runoff presents a different set of problems than developing a system to treat wastewater. This chapter addresses these differences and creation of a particular wetlands. Wetlands enhance water quality through a variety of physical, chemical, and biological processes that trap and degrade pollutants. The physical processes of sedimentation, adsorption, and filtration are key in capturing pollutants. Once in the system, pollutants may be degraded, stored indefinitely, or removed periodically (usually through dredging). Clearly, urban stormwater wetlands systems provide an outstanding opportunity to meet water quality objectives and provide a multitude of other benefits to society.
Volume Scattering
Published in Yoshio Yamaguchi, Polarimetric SAR Imaging, 2020
Wetlands cover at least 6% of the earth’s surface. Wetland ecosystems play a key role in hydrological and biogeochemical cycles and comprise a large part of the world’s biodiversity and resources [18]. They provide a critical habitat for a wide variety of plant and animal species, including the larval stages of many fish and insects, a resort for migrating birds, forage for cattle grazing, and bee flora. Wetlands also deliver a wide range of important services, including water supply, water purification, carbon sequestration, coastal protection, and outdoor recreation. Intact wetlands perform as buffers in the hydrological cycle and as sinks for organic carbon, counteracting the effects of the increase in atmospheric CO2. Thus, their sustainable use ensures human and economic development and quality of life.
Exploring cooperation over transboundary wetlands: the Hamoun Wetlands, Okavango Delta and Wadden Sea
Published in Water International, 2023
Zoe H. Rosenblum, Susanne Schmeier
Wetlands provide numerous benefits, from the tangible provision of food, fuel and wildlife habitat to the less-tangible storage of carbon and floodwaters (Revenga et al., 2000). Despite increased understanding of the benefits of wetlands, the global wetland area continues to decrease: an estimated 87% of the world’s wetlands have been lost since 1700 (Davidson, 2014, p. 939). Wetlands face pressure from economic development and human population growth, which lead to wetland degradation through the intensification of agriculture, water abstraction and coastal development (Finlayson & D’Cruz, 2005). For example, conversion to agricultural land accounts for about 60% of total wetland loss in Europe (Mitsch & Gosselink, 2007). Climate change exacerbates wetland decline (Ballut-Dajud et al., 2022). When wetlands disappear, so, too, do the benefits they provide.
Effective use of microbes in waste soil stabilisation considering natural temperature variations
Published in Geomechanics and Geoengineering, 2022
B. A. Mir, K. M. N. Saquib Wani
Wetlands are shallow areas that are flooded at regular intervals or inundated long enough to sustain vegetation or other forms of aquatic life along with supporting many different life forms like migratory birds, animals, herbs etc. A wetland is referred to as an ecotone which means part of it is land and other part is water. Changing climate, geology, and other environmental aspects have created a variety of wetlands globally with diverse hydrology’s that affect the development of plants and soil, their use by wildlife, their functions and values (Tiner 2009). Many researchers in the past have tried to put forth case studies and observations for proper relocation of dredged sediments considering mangrove and wetland restoration (Redmond 2000, Ohimain 2004). Dredged materials can be utilised for the construction of artificial reefs and restoration, foreshore wetland creation, water body’s floor re-contouring, filling dead-end canals, creation of migratory birds/wildlife islands and landfill reclamation (Yozzo et al. 2004).
Data driven modelling and simulation of wetland dynamics
Published in International Journal of Modelling and Simulation, 2022
Angesh Anupam, David J. Wilton, Visakan Kadirkamanathan
A wetland is a land area that is inundated with water and often displays seasonal variations because of soil properties, climatic condition, and orography of the site. Wetlands are considered to be a major source of methane emission. Besides positive emissions of greenhouse gases like methane, wetlands proffer various types of vegetations allowing the sequestration of organic carbon and regulating the carbon cycle [1]. Evapotranspiration resulting due to wetlands has substantial effects on the energy exchange between atmosphere and land surface. This complex phenomenon links many climatic variables with the wetland extent of a region, which is usually quantified by the wetland fraction () [2,3]. The term, , is defined as the fraction of inundated land area at a given time.