water body Articles
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Hydrodynamics - Natural Water Bodies
The knowledge of the characteristics of the fluids and their ability to transport substances and physical properties is relevant for us. However, the quantification of the movements of fluids is a complex task, and when considering natural flows, occurring in large scales (rivers, lakes, oceans), this complexity is evidenced. This book presents conclusions about different aspects of flows in ...
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Understanding the drivers of sanitation behaviour in riverine communities of Niger Delta, Nigeria: the case of Odi and Kaiama communities
Recent reports show that between 1990 and 2012, among countries, Nigeria had the highest increase in the absolute number of open defecators. Bayelsa State makes a huge contribution to these numbers as almost 70% of residents lack access to improved sanitation. The adoption of Community-Led Total Sanitation (CLTS) as national policy has improved sanitation in the country, but progress has been ...
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Use of Landsat ETM+ data for delineation of water bodies in hilly zones
The remotely sensed Landsat Enhanced Thematic Mapper Plus (ETM+) dataset is used for the detection and delineation of water bodies in hilly zones. The water bodies were detected using Surface Wetness Index (SWI), Normalised Difference Vegetation Index (NDVI) and a slope map. The assessment of areas under dense vegetation in water bodies is omitted in the combined map prepared using classified ...
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TFA from HFO‐1234yf: Accumulation and aquatic risk in terminal water bodies
A next‐generation mobile automobile air‐conditioning (MAC) refrigerant, HFO‐1234yf (CF3CF = CH2), is being developed with improved environmental characteristics. In the atmosphere, it ultimately forms trifluoroacetic acid (TFA(A); CF3COOH), which is subsequently scavenged by precipitation and deposited on land and water as trifluoroacetate (TFA; CF3COO‐). Trifluoroacetate is environmentally ...
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The potential to improve flood simulation and forecasting
The potential to improve flood simulation and forecasting by the use of predicted rainfall data based on radar measurements (virtual gauge) was investigated in two projects. Thus, water level in water bodies could be forecasted at neuralgic point, based on runoff ...
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Of water and worms: Guinea worm re-emergence in Niger
This paper aims to provide a better understanding of the re-emergence of Guinea worm into the water bodies of the Tillabéri region of the Niger Sahel. It examines the period of re-emergence and subsequent decline from 2002 until 2006. Using a geographic information system combined with a statistical approach to examine the location data of lakes with Guinea worm-associated cases, it is ...
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Urban impact on water bodies in the Luleå area, northern Sweden, and the role of redox processes
Sediment and water from urban water bodies in the Luleå area, northern Sweden, were studied to determine the degree of contamination from metals and PAHs (polycyclic aromatic hydrocarbons). The heavy metals Cd, Cu, Pb and Zn, which are of main concern in urban stormwater, are enriched in all investigated bays. PAH concentrations were also found to be enriched. The water and sediment ...
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Characteristics and indications of hydrogen and oxygen isotopes distribution in lake ice body
Stable isotopes have been used to identify the characteristics of precipitation, evaporation, basin hydrology, and residence times. However, lakes in the cold regions are usually covered by ice for 5–6 months. To get a better understanding of stable isotopes characteristics and indications in lake ice bodies, ice and water were sampled during the icebound season in both the ice and water ...
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Supply Concerns Continue, and Uncertainties Complicate Planning
The nation’s water bodies have long supplied Americans with abundant freshwater, but recent events, such as the ongoing California drought, have focused attention on competing demands for this limited resource. In the United States, the states are primarily responsible for managing freshwater resources, and many federal agencies influence states’ management decisions. In 2003, GAO ...
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Influence of initial pesticide concentrations in water on chlorpyrifos toxicity and removal by
Iris pseudacorus For understanding the influence of initial concentrations of pesticides in the water body on removal efficiency of the contaminant by aquatic plants, one hydroponics experiment was used to investigate the influence of initial concentration (1–16 mg L−1) on toxicity and chlorpyrifos removal potential of Iris pseudacorus for 20 days under greenhouse conditions. An increased ...
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Filtering and retention structures
Filtering and retention structures serve the purification and intermediate storage of rainwater discharge from tilled areas. The untreated rainwater from a seperate sewer system can have a major share in water body pollution. Thereby, especially the concentration of filtratable material is problematic. Additionally, rainwater floats intermittently into the water body. Measures for purification ...
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Landscape limnology
Landscape limnology is the spatially-explicit study of lakes, streams, and wetlands as they interact with the freshwater, terrestrial, and human landscapes to determine the effects of pattern on ecosystem processes across temporal and spatial scales. The terrestrial component represents spatial hierarchies of landscape features that influence what materials, whether ...
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Linking the management of urban watersheds with the impacts on the receiving water bodies: the use of flow duration curves
There is growing evidence that changes in the current hydrological behaviour of urbanising catchments are a major source of impacts on the downstream water bodies. However, current flow-rates are rarely considered in studies on urban stormwater management, usually focused on extreme flow-rates. We argue that taking into account receiving water bodies is possible with relatively small ...
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Benefit–cost analysis of lake conservation with emphasis on aesthetics in developing countries
Urban water bodies like lakes, wetlands and rivers carry a number of intangible benefits. In order to assess true value of societal welfare and benefits derived from these assets, social benefit cost analysis (SBCA) should be preferred. Hedonic pricing method has been used in the present study for capturing the aesthetic benefit of the Sukhna Lake of Chandigarh City and then using the results in ...
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Water quality of Danube Delta systems: ecological status and prediction using machine-learning algorithms
Environmental issues have a worldwide impact on water bodies, including the Danube Delta, the largest European wetland. The Water Framework Directive (2000/60/EC) implementation operates toward solving environmental issues from European and national level. As a consequence, the water quality and the biocenosis structure was altered, especially the composition of the macro invertebrate ...
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Comparative study of body composition of different fish species from brackish water pond
Seven species of fish (Catla catla, Cirrhinus mrigala, Cyprinus carpio, Hypophthalmicthys molitrix, Labeo rohita, Mori-Rahu Hybrid and Thalla-Rahu Hybrid) were collected from a brackish water pond near Muzaffargarh, Pakistan for the comparison of body composition. All the seven species were found relatively well adapted to the saline environment though some of them showed significant differences ...
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Environmental mercury in China: A review
As a global pollutant, mercury can be transported over long distances and bioaccumulate. China is currently the greatest contributor to atmospheric Hg emissions and has the greatest intentional use of Hg. Mercuryin the Chinese environment is generally elevated, particularly in air and water bodies. Remote areas in China also show elevated Hg levels in air and water bodies compared with other ...
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Selection Bias Correction For Species Sensitivity Distribution Modelling And Hazardous Concentration Estimation
The species sensitivity distribution (SSD) has been an important development in ecotoxicology and, despite numerous concerns having been raised over many years, it remains the preferred (and often-times mandated) technique for establishing ‘safe’ concentrations of contaminants in receiving water bodies by jurisdictions around the world. Although universally recognised as a crucial ...
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Diffuse pollution
Diffuse Pollution or Nonpoint source (NPS) pollution is water pollution affecting a water body from diffuse sources, such as polluted runoff from agricultural areas draining into a river, or wind-borne debris blowing out to sea. Nonpoint source pollution can be contrasted with point source pollution, where discharges occur to a body of water at a single location, such as discharges from a ...
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High Voltage Electrocoagulation Equipment for Industrial Wastewater Treatment (predest-ec.com)
High Voltage Electrocoagulation (HVEC) Overview A metal cation flocculant is produced by the sacrificial anode metal electrode, and the pollutants are separated from the water body through coagulation, floatation, reduction and oxidative decomposition to achieve a technology for purifying the water body. In this video we show the effects of this treatment on industrial effluents. Click this ...
By YASA ET
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