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Treatment, residual chlorine and season as factors affecting variability of trihalomethanes in small

Roberta DYCK,Geneviève COOL,Manuel RODRIGUEZ,Rehan SADIQ

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 1,   Pages 171-179 doi: 10.1007/s11783-014-0750-1

Abstract: Seasonal variability in source water can lead to challenges for drinking water providers related to operationalThe objective of this study is to investigate seasonal variability of water quality in municipal smallThe seasonal variability was generally more pronounced in systems using chlorination plus additionalSeasonal variations were most pronounced for residual chlorine in systems with additional treatment.study with these data will be beneficial in finding determinants and indicators for both quantity and variability

Keywords： drinking water     residual chlorine     seasonal variability     small municipal systems     treatment technologies    

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Soil spatial variability impact on the behavior of a reinforced earth wall

Adam HAMROUNI, Daniel DIAS, Badreddine SBARTAI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 518-531 doi: 10.1007/s11709-020-0611-x

Abstract: This article presents the soil spatial variability effect on the performance of a reinforced earth wallThe Monte Carlo simulation technique is used to obtain the deformation response variability of the reinforcedThe influences of the spatial variability response of the geotechnical system in terms of horizontalThe results obtained show that the spatial variability has an important influence on the facing horizontal

Keywords： reinforced earth wall     geosynthetic     random field     spatial variability     Monte Carlo simulation    

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Fuel variability effect on flickering frequency of diffusion flames

Jizhao LI, Yang ZHANG

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 134-140 doi: 10.1007/s11708-009-0034-9

Abstract: It is known that fuel variability of different gas suppliers may cause combustion instability in a gasThe intent of this study is to investigate the fuel variability on the flickering frequency of diffusionflames in the hope of understanding some of the fundamental aspects of fuel variability effect on the

Keywords： fuel variability     flickering frequency     diffusion flames     dynamics of combustion    

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Optimization for operating modes based on simulation of seasonal underground thermal energy storage

ZHAO Jun, CHEN Yan, LI Xinguo

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 298-301 doi: 10.1007/s11708-008-0053-y

Abstract: A simulation was performed, which concerned the feasibility of seasonal underground thermal energy storage
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Numerical simulation of underground seasonal cold energy storage for a 10 MW solar thermal power plant

Zulkarnain ABBAS, Yong LI, Ruzhu WANG

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 328-344 doi: 10.1007/s11708-020-0676-1

Abstract: This paper aims to explore an efficient, cost-effective, and water-saving seasonal cold energy storageThe proposed seasonal cooling mechanism is designed for the areas under typical weather conditions toThe proposed seasonal cooling system is capable of enhancing the efficiency of a solar thermal power

Keywords： seasonal cold energy storage     borehole heat exchangers     typical meteorological data     TRNSYS     condenser cooling    

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Seasonal and treatment-process variations in invertebrates in drinking water treatment plants

Zhiling Wu, Xianchun Tang, Hongbin Chen

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1354-6

Abstract: Abstract • Seasonal and treatment-process variations in invertebrates in a DWTP were analyzed. • Theeach treatment stage in a drinking water treatment plant between May 2015 and April 2016 and analyzed seasonal

Keywords： Invertebrates     Drinking water     Seasonal variations     Treatment process    

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Quantifying and mapping spatial variability of Shanghai household carbon footprints

Shangguang YANG,Chunlan WANG,Kevin LO,Mark WANG,Lin LIU

Frontiers in Energy 2015, Volume 9, Issue 1,   Pages 115-124 doi: 10.1007/s11708-015-0348-8

Abstract: Understanding the spatial variability of household carbon emissions is necessary for formulating sustainableThe findings reveal substantial spatial variability in household carbon emissions, especially in transport-related

Keywords： household carbon emissions     spatial variability     energy policy     Shanghai     China    

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Distribution and temporal variability of the solar resource at a site in south-east Norway

Muyiwa S. ADARAMOLA

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 375-381 doi: 10.1007/s11708-016-0426-6

Abstract: However, the variability of this resource has been the main barrier for solar energy development in mostThis paper investigated the distribution and variability of solar radiation using the a 10-year (2006

Keywords： coefficient of variation     global solar radiation     diffuse ratio     albedo     PV energy systems    

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Shallow foundation response variability due to soil and model parameter uncertainty

Prishati RAYCHOWDHURY,Sumit JINDAL

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 3,   Pages 237-251 doi: 10.1007/s11709-014-0242-1

Abstract: Geotechnical uncertainties may play crucial role in response prediction of a structure with substantial soil-foundation-structure-interaction (SFSI) effects. Since the behavior of a soil-foundation system may significantly alter the response of the structure supported by it, and consequently several design decisions, it is extremely important to identify and characterize the relevant parameters. Moreover, the modeling approach and the parameters required for the modeling are also critically important for the response prediction. The present work intends to investigate the effect of soil and model parameter uncertainty on the response of shallow foundation-structure systems resting on dry dense sand. The SFSI is modeled using a beam-on-nonlinear-winkler-foundation (BNWF) concept, where soil beneath the foundation is assumed to be an assembly of discrete, nonlinear elements composed of springs, dashpots and gap elements. The sensitivity of both soil and model input parameters on shallow foundation responses are investigated using first-order second-moment (FOSM) analysis and Monte Carlo simulation through Latin hypercube sampling technique. It has been observed that the degree of accuracy in predicting the responses of the shallow foundation is highly sensitive soil parameters, such as friction angle, Poisson’s ratio and shear modulus, rather than model parameters, such as stiffness intensity ratio and spring spacing; indicating the importance of proper characterization of soil parameters for reliable soil-foundation response analysis.

Keywords： shallow foun dation     sensitivity analysis     centrifuge data     first-order-second-moment (FOSM) method     parameter uncertainty    

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Quantification of emission variability for off-road equipment in China based on real-world measurements

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1455-x

Abstract:

• Emissions from 53 in-use diesel-fueled off-road equipment were measured.

Keywords： Off-road equipment     Portable emission measurement system (PEMS)     Real-world emissions     Diesel engine    

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Variability of waste copper slag concrete and its effect on the seismic safety of reinforced concrete

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 1,   Pages 117-130 doi: 10.1007/s11709-021-0788-7

Abstract: In particular, the variability in the strength properties of waste copper slag concrete, which is required

Keywords： waste copper slag     quantification of variability     goodness-of-fit test     seismic risk assessment     PSDM    

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Seasonal variation of nitrogen and phosphorus in Xiaojiang River—A tributary of the Three Gorges Reservoir

Zhe LI , Jinsong GUO , Man LONG , Fang FANG , Jinping SHENG , Hong ZHOU ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3,   Pages 334-340 doi: 10.1007/s11783-009-0039-y

Abstract: A yearlong monitoring program in the backwater area of Xiaojiang River (XBA) was launched in order to investigate the eutrophication of backwater areas in tributaries of the Yangtze River in the Three Gorges Reservoir (TGR) in China, starting after the impoundment water level of the TGR reached 156 m. From March 2007 to March 2008, the average concentration of total nitrogen (TN) and total phosphorus (TP) were (1553 ± 484) μg·L and (62 ± 31) μg·L, respectively. The mean value of chlorophyll was (9.07 ± 0.91) μg·L. The trophic level of XBA was meso-eutrophic, while the general nutrient limitation was phosphorus. The results indicated that XBA has a strong ability to purify itself and has non-point source pollution from terrestrial runoff. The variation of TN/TP ratio was caused by a variation in TN rather than in TP when TN/TP<22. N-fixation from cyanobacteria occurred and became an important process in overcoming the nitrogen deficit under a low TN/TP ratio. When TN/TP ≥ 22, the variation of TP affected the TN/TP ratio more significantly than TN. The increase of TP in XBA was caused mainly by particulate phosphorus, which could originate from a non-point source as adsorptive inorganic forms after heavy rainfall and surface runoff. An increase in the river’s flow could also contribute to an unstable environment for the growth of phytoplankton.

Keywords： Three Gorges Reservoir     eutrophication     nitrogen     phosphorus     seasonal variation     chlorophyll    

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Spatial and seasonal variations in bacterial communities of the Yellow Sea by T-RFLP analysis

Hongyuan WANG, Xiaolu JIANG, Ya HE, Huashi GUAN

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 2,   Pages 194-199 doi: 10.1007/s11783-009-0018-3

Abstract: mud flat shore, and artificial harbor) at the Yellow Sea were chosen to investigate the spatial and seasonalThe MDA analysis results of T-RFLP profiles coming from I and I both exhibited a significant seasonal

Keywords： terminal restriction fragment length polymorphism (T-RFLP)     bacterial community structure     marine microbial diversity     HhaI     MspI    

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The effect of texture and irrigation on the soil moisture vertical-temporal variability in an urban artificial

Xiaofeng ZHANG,Xu ZHANG,Guanghe LI

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 2,   Pages 269-278 doi: 10.1007/s11783-014-0672-y

Abstract: Soil moisture variability in natural landscapes has been widely studied; however, less attention hasbeen paid to its variability in the urban landscapes with respect to the possible influence of texture

Keywords： moisture vertical distribution     moisture temporal variation     texture stratification     irrigation     meteorological forcing     urban landscape    

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Using balance of seasonal herbage supply and demand to inform sustainable grassland management on the

Xinquan ZHAO, Liang ZHAO, Qi LI, Huai CHEN, Huakun ZHOU, Shixiao XU, Quanmin DONG, Gaolin WU, Yixin HE

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 1,   Pages 1-8 doi: 10.15302/J-FASE-2018203

Abstract: production on the QTP is characterized by imbalance in both quality and quantity between livestock seasonal

Keywords： ecosystem function     grassland degradation     grassland management     integrated rangeland-cropland-livestock production system     Qinghai–Tibetan Plateau    

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Title Author Date Type Operation

Treatment, residual chlorine and season as factors affecting variability of trihalomethanes in small

Roberta DYCK,Geneviève COOL,Manuel RODRIGUEZ,Rehan SADIQ

Journal Article

Soil spatial variability impact on the behavior of a reinforced earth wall

Adam HAMROUNI, Daniel DIAS, Badreddine SBARTAI

Journal Article

Fuel variability effect on flickering frequency of diffusion flames

Jizhao LI, Yang ZHANG

Journal Article

Optimization for operating modes based on simulation of seasonal underground thermal energy storage

ZHAO Jun, CHEN Yan, LI Xinguo

Journal Article

Numerical simulation of underground seasonal cold energy storage for a 10 MW solar thermal power plant

Zulkarnain ABBAS, Yong LI, Ruzhu WANG

Journal Article

Seasonal and treatment-process variations in invertebrates in drinking water treatment plants

Zhiling Wu, Xianchun Tang, Hongbin Chen

Journal Article

Quantifying and mapping spatial variability of Shanghai household carbon footprints

Shangguang YANG,Chunlan WANG,Kevin LO,Mark WANG,Lin LIU

Journal Article

Distribution and temporal variability of the solar resource at a site in south-east Norway

Muyiwa S. ADARAMOLA

Journal Article

Shallow foundation response variability due to soil and model parameter uncertainty

Prishati RAYCHOWDHURY,Sumit JINDAL

Journal Article

Quantification of emission variability for off-road equipment in China based on real-world measurements

Journal Article

Variability of waste copper slag concrete and its effect on the seismic safety of reinforced concrete

Journal Article

Seasonal variation of nitrogen and phosphorus in Xiaojiang River—A tributary of the Three Gorges Reservoir

Zhe LI , Jinsong GUO , Man LONG , Fang FANG , Jinping SHENG , Hong ZHOU ,

Journal Article

Spatial and seasonal variations in bacterial communities of the Yellow Sea by T-RFLP analysis

Hongyuan WANG, Xiaolu JIANG, Ya HE, Huashi GUAN

Journal Article

The effect of texture and irrigation on the soil moisture vertical-temporal variability in an urban artificial

Xiaofeng ZHANG,Xu ZHANG,Guanghe LI

Journal Article

Using balance of seasonal herbage supply and demand to inform sustainable grassland management on the

Xinquan ZHAO, Liang ZHAO, Qi LI, Huai CHEN, Huakun ZHOU, Shixiao XU, Quanmin DONG, Gaolin WU, Yixin HE

Journal Article