Read by QxMD icon Read

Environmental Monitoring and Assessment

İlginç Kızılpınar Temizer, Aytaç Güder, Fulya Aydın Temel, Esin Avci
Pollen is one of the most valuable nutrients due to its content and antioxidant activity. In this study, its botanic origin, total phenol content (TPC), total flavonoid content (TFC), the hydrogen peroxide scavenging activity (HPSA) (in terms of SC50 ), ferric reducing antioxidant power capacity (FRAP), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity (in terms of SC50 ), metal-chelating activity (MCA) (%), and heavy metal content were examined to determine the quality of pollen that has been collected from seven different cities of Turkey...
July 12, 2018: Environmental Monitoring and Assessment
Saeed Ghorbani, Morteza Barari, Mojtaba Hoseini
Seismic events such as earthquakes are one of the most important issues in the field of geology. Meanwhile, less attention has been paid to micro-seismic events, despite the high number of earthquakes. Earthquakes, regardless of their size, affect human life; therefore, their detection and management is considered an important issue. For this purpose, experts developed seismic arrays as a system of linked seismometers. These systems equipped with sensors and seismographs are able to receive a range of waves from the earth, which are then sent to the central seismic station for analysis...
July 12, 2018: Environmental Monitoring and Assessment
Jung Min Ahn, Kang Young Jung, Deuk Seok Yang, Dong-Seok Shin
The multi-functional weirs constructed as part of the Four Major River Restoration Project in Korea are operated for water level management and may have a backwater effect in estuaries. If the main channel of the Nakdong River flows backward and affects the estuary water, the water quality in the estuaries may not be representative of the tributary water quality. In this study, we confirmed the representativeness of the existing water quality monitoring networks using spatiotemporally disperse electrical conductivity observations, self-organizing maps (SOMs) for monthly pattern analysis, and the LOcally WEighted Scatter plot Smoother (LOWESS) technique for trend analysis...
July 12, 2018: Environmental Monitoring and Assessment
S F Dal Sasso, A Pizarro, C Samela, L Mita, S Manfreda
Advances in flow monitoring are crucial to increase our knowledge on basin hydrology and to understand the interactions between flow dynamics and infrastructures. In this context, image processing offers great potential for hydraulic monitoring, allowing acquisition of a wide range of measurements with high spatial resolution at relatively low costs. In particular, the particle tracking velocimetry (PTV) algorithm can be used to describe the dynamics of surface flow velocity in both space and time using fixed cameras or unmanned aerial systems (UASs)...
July 11, 2018: Environmental Monitoring and Assessment
Anna-Marie Corman, Philipp Schwemmer, Moritz Mercker, Harald Asmus, Heinz Rüdel, Roland Klein, Markus Boner, Sabine Hofem, Jan Koschorreck, Stefan Garthe
Marine ecosystems are exposed to increasing human pressures and climatic change worldwide. It has therefore become essential to describe ecosystem statuses with respect to multinational protection schemes, often necessitating long-term monitoring programmes. Changes in the food-web structure, which can be monitored via stable isotope measurements, represent an important descriptor of the status of marine ecosystems. We investigated long-term changes (29 years) in isotopic values (δ13 C and δ15 N) in four indicative organisms at different trophic levels in the southern North and Baltic Seas: bladderwrack (Fucus vesiculosus), blue mussel (Mytilus ssp...
July 11, 2018: Environmental Monitoring and Assessment
Slobodanka Pajević, Danijela Arsenov, Nataša Nikolić, Milan Borišev, Dejan Orčić, Milan Župunski, Neda Mimica-Dukić
Continuous monitoring of heavy metal content in vegetables is of high priority for population nutrition control, as well as risk assessment for human health. The chemical composition of plants is a reliable indicator of their contamination by hazardous substances accumulated in the environment as a consequence of inadequately applied agro-technology. The main goal of this study was to examine the quality of vegetables that reach consumer markets as a function of growth location. Samples of 11 of the most common vegetable species used in the human diet were collected during a 4-year survey...
July 11, 2018: Environmental Monitoring and Assessment
Shuling Song, Xiaodong Ma, Meng Pan, Ling Tong, Qin Tian
Breastfeeding is a specific and important way for women to eliminate harmful substances accumulated in body. Hexachlorobenzene (HCB), β-hexachlorocyclohexane (β-HCH), and 2,2-bis(p-chlorophenyl)-1,1-dichloroethene (p,p'-DDE) are dominant organochlorine compounds(OCCs) and persistent organic pollutants (POPs) accumulated in human being. Although a 6-month breastfeeding was suggested by the World Health Organization (WHO), the excretion characteristics of OCCs in human milk during the first 6-month lactation remain controversial...
July 11, 2018: Environmental Monitoring and Assessment
Mark E Grismer
Creating or recruiting new riparian forests to improve Lower Putah Creek (LPC) ecosystem functions is challenging under the modified stream flow regime developed after historic gravel mining and installation of Monticello Dam upstream. Hydrologic connectivity between riparian trees, shallow groundwater, and the low flow channel is essential towards maintaining these forests and related habitats through the annual summer and multi-year drought periods typical in this Sacramento Valley region of California. Despite increased average summer flows, significant mature cottonwood and willow tree mortality along the LPC riparian areas below the Putah Creek diversion dam in 2014 raised concerns over the soil and hydrologic factors affecting riparian vegetation survival...
July 11, 2018: Environmental Monitoring and Assessment
A Genga, Tiziana Siciliano, M Siciliano, D Aiello, C Tortorella
PM10 samples were collected simultaneously at three representative areas (urban, industrial, and rural areas). Their morphology and elemental composition were determined by scanning electron microscopy coupled with energy-dispersive analysis (SEM-EDS). Twenty-four chemical parameters (C, O, Na, Mg, Al, Si, P, Cd, Cl, K, Ca, S, Sn, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, W, and Pb) were determined and three morphological parameters (area, roundness, and fractal dimension) were measured by Image Pro Analyzer 6.3. The particles were classified into ten groups based on morphology and elemental composition: Ca-rich and metal particles, soot aggregates, cenosphere, alumosilicates, sea salt, calcium sulfate, spherical particles of iron, biological carbonaceous particles, and various...
July 10, 2018: Environmental Monitoring and Assessment
Pedro Teixeira, Luís Almeida, João Brandão, Sílvia Costa, Susana Pereira, Elisabete Valério
Mitigation of global warming scenarios by the United Nations Economic Commission for Europe (UNECE) water convention requires better water use policies by all management parties. One of Lisbon's municipal contributions to target a sustainable urban water cycle has been to assess the microbial and hydrochemical quality of groundwater. The aim is to clarify the possible existence of contaminations and respective sources, seasonality, and to assess non-drinking alternative uses of those waters. To this respect, five water sources over a 4-year period were monitored for physical, chemical, and microbial parameters (temperature, pH, NO2 - , NO3 - , NO4 - , oxidability, conductivity, total hardness, Escherichia coli, total coliforms, enterococci, and heterotrophic plate count at 22 °C and 37 °C)...
July 9, 2018: Environmental Monitoring and Assessment
Gökhan Şen, Ersin Güngör, Hakan Şevik
In addition to the growing world population, continuous migration from rural areas to city centers leads to rapid population growth in urban centers, bringing with it a change in land use/cover in those areas. This change usually manifests itself as an increase in artificial surfaces and a decrease in agricultural areas and forestlands. However, agricultural areas and forests in the vicinity of city centers contain sensitive ecosystems that require careful monitoring. It is crucial that the impact of population growth in the city centers on these areas is determined...
July 7, 2018: Environmental Monitoring and Assessment
Wei Wei, Yating Wang, Gan Yang, Li Yue, Shuiyuan Cheng
Volatile organic compounds (VOCs) play a key role in air pollution of China. Among various sources, petrochemical industry is one of the important contributors, but its VOC emission estimate still exists a big uncertainty. Therefore, this study developed an inverse-dispersion calculation method (IDM), and applied it in a typical petrochemical plant that manufactures ethylene (170 kt/year), polyethylene (100 kt/year), and polypropylene (61 kt/year), and determined the VOC emission amount for this complex industrial area source...
July 7, 2018: Environmental Monitoring and Assessment
Feng Huang, Yao Wu, Bao Qian, Lidan Guo, Dayong Zhao, Li Ren, Ziqiang Xia
Hydrologic regimes are essential to riverine, lacustrine, and wetland ecosystems, and every component of a hydrologic regime has a specific ecological environmental function. In an outflow lake-river system, water levels are reduced by a reservoir constructed at the river, which interferes with the river-lake interrelationships by impairing the river's blocking effect. This increases the lake-river hydraulic gradient and accelerates the lake's drainage to the river, resulting in shrinkage of the lake and damaging environmental issues...
July 7, 2018: Environmental Monitoring and Assessment
Debarati Ghosh, Bana Bihari Jana, Susmita Lahiri, Jatridranath Bhakta, Ankita Bhattacharjee
The responses of cellulase enzymes of three bacterial isolates and their impacts on cattle manure decomposition were assessed in a greenhouse model in vivo pond ecosystem. Fifty grams of fresh cattle manure was placed in a fastened nylon bag (mesh size ~ 50 μm dia.) and placed in triplicate in a plastic bucket with 10 l of pond water which was hung inside the enclosed polyhouse, semi-closed and open systems for 4 weeks. Samples of manure residue directly from nylon bag and water from manure leached bucket water, water, and soil from the enclosed polyhouse were collected for enzymatic assays, enumeration of aerobic cellulose decomposing and heterotrophic bacteria, and determination of water and soil quality parameters...
July 7, 2018: Environmental Monitoring and Assessment
Valquiria Maria de Carvalho Aguiar, Paula Ferreira Falheiro Abuchacra, José Antônio Baptista Neto, Allan Sandes de Oliveira
Three-stage sequential extraction BCR was applied to surface sediments from the west part of Guanabara Bay to assess the mobility of Zn, Cu, Pb, Ni, Cr, and Mn. Results were satisfactory for the analysis of certificate standard material (BCR 701), with recoveries between 71 (Cu) and 123% (Cr). Evaluation of organic matter composition classified the area as eutrophic (CHO:PRT > 1), with aged organic detritus at some stations. Zn exhibited by far the greatest bioavailability, with 43.49% of its concentrations associated with the exchangeable fraction...
July 4, 2018: Environmental Monitoring and Assessment
M H Rasouli-Sadaghiani, M Barin, S Siavash Moghaddam, C A Damalas, K Ghodrat
The impact of land-use change on parameters of the soil was evaluated in soil samples from arable land, orchard land, and grassland in West Azerbaijan, Iran, compared with their adjacent natural forestland, using some biological indices. Microbial biomass carbon (MBC); microbial basal respiration (BR); metabolic quotient (qCO2); substrate induced respiration (SIR); carbon availability index (CAI); the microbial quotient, i.e., the ratio of microbial carbon to soil organic carbon (Cmic /Corg ); and soil organic carbon (SOC) were calculated in collected soil samples...
July 4, 2018: Environmental Monitoring and Assessment
Ravinesh C Deo, Hi-Ryong Byun, Ga-Byn Kim, Jan F Adamowski
A water resources index based on weight-accumulated precipitation over the passage of time in heavy rainfall events is used in this study for monitoring flood risk and peak danger, as well as to develop flood warnings. In this research, an hourly water resources index (WRIhr ) based on rainfall accumulations over the passage of time is proposed. WRIhr is able to monitor flood risk by taking into account the hourly effective precipitation that accumulates the precipitation (Phr ) of both current and antecedent hours, while the contributions from the preceding hours is subjected to a time-dependent reduction function that addresses the depletion of water volume by various hydrological processes (e...
July 4, 2018: Environmental Monitoring and Assessment
Yasser El-Nahhal
Pesticide residues threaten fish that live in rivers. This study investigated the effects of Nemacur, malathion, and diuron on freshwater fish behavior, mortality, acetylcholinesterase (ACHE) activity, liver biomarkers, and residue accumulation. Fish were exposed to individual concentration of Nemacur, malathion, and diuron at 1 mg/L and to binary mixtures in glass aquarium 16 L capacity. Mortality of fish was also investigated at a range of 0.0-1 mg/L of Nemacur and malathion. The biochemical effects of the tested compounds were recorded...
July 4, 2018: Environmental Monitoring and Assessment
Erin McGauley, Brett Tregunno, F Chris Jones
Hilsenhoff's family-level index (FBI) combines information about the relative abundances of taxa and their tolerances to pollution. Versions of this index are used extensively in North America to assess water quality. When faced with constraints on time, money, or expertise, bioassessment practitioners have been tempted to calculate a version of the FBI with very coarse (e.g., order-level) taxonomy. Such an approach requires a degree of within-taxon averaging of tolerance values and raises questions about the degree to which accuracy is compromised and bias is introduced...
July 4, 2018: Environmental Monitoring and Assessment
P Prabu, Mithas Ahmad Dar
The purpose of the present study was to explain land-use/cover changes in Coimbatore City Corporation using Landsat ETM+ and Landsat 8 Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) data for the period of 2003-2014. Two Landsat images from years 2003 and 2014 were downloaded from USGS Earth Explorer. Maximum likelihood method was used to classify the images into five classes: urban fabric, vegetation, water bodies, agriculture lands, and barren lands. Overall kappa accuracy measure is about to 87...
July 2, 2018: Environmental Monitoring and Assessment
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"