On the risks from sediment and overlying water by replenishing urban landscape ponds with reclaimed wastewater

2018 ◽  
Vol 236 ◽  
pp. 488-497 ◽  
Author(s):  
Dong Ao ◽  
Rong Chen ◽  
Xiaochang C. Wang ◽  
Yanzheng Liu ◽  
Mawuli Dzakpasu ◽  
...  
Keyword(s):  
Urban Landscape ◽  
Reclaimed Wastewater ◽  
Overlying Water

scholarly journals Implication of environmental factors on the occurrence of pathogens in urban landscape ponds with reclaimed wastewater replenishment

2019 ◽  
Vol 1 (1) ◽  
pp. 119-133 ◽  
Author(s):  
Dong Ao ◽  
Yue Huang ◽  
Tao Xue ◽  
Nan Wang ◽  
Rong Chen
Keyword(s):  
Environmental Factors ◽  
Urban Landscape ◽  
Reclaimed Wastewater ◽  
Algae Bloom ◽  
Overlying Water ◽  
Viral Pathogens ◽  
Viral Pathogen ◽  
Chl A ◽  
One Year ◽  
Favorable Conditions

Abstract One year of continuous observation of bacterial and viral pathogen concentrations in overlying water and sediment of three urban landscape ponds replenished with reclaimed wastewater (RW) ponds was carried out to establish the distribution of pathogens and investigate the effects of environmental factors on that in RW ponds. The pathogens were represented by Escherichia coli and three common viral pathogens (enterovirus, norovirus, and rotavirus). Results indicated that the peak concentrations of pathogens occur from August to October. Pathogens present in sediment should be paid much more attention than those in overlying water, as they mainly contribute to the favorable conditions for survival and regrowth of pathogens in sediments. Cluster and redundancy analyses revealed that the environmental factors of chlorophyll a (Chl-a), organic matter, and water transparency have key impacts on the occurrence of pathogens. This infers that the practical way to reduce pathogenic risks in RW ponds is to control the algae bloom and improve the transparency of water bodies. Furthermore, based on breakpoint regression analyses, the appropriate ranges of Chl-a and transparency are suggested to be less than 57 mg/m3 and greater than 68 cm, respectively, to reduce the concentration of pathogens in urban landscape ponds replenished with RW.

Insight into the risk of replenishing urban landscape ponds with reclaimed wastewater

2017 ◽  
Vol 324 ◽  
pp. 573-582 ◽  
Author(s):  
Rong Chen ◽  
Dong Ao ◽  
Jiayuan Ji ◽  
Xiaochang C. Wang ◽  
Yu-You Li ◽  
...  
Keyword(s):  
Urban Landscape ◽  
Reclaimed Wastewater ◽  
Insight Into

scholarly journals Nitrogen Dynamics Variation in Overlying Water of Jinshan Lake, China

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Xiaohong Zhou ◽  
Mingyuan Wang ◽  
Longmei Liu ◽  
Zhigang Chen ◽  
Yimin Li ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Urban Landscape ◽  
Seasonal Pattern ◽  
Physicochemical Characteristics ◽  
Water Area ◽  
Overlying Water ◽  
The North ◽  
Sampling Points ◽  
Spatial Differences ◽  
Nitrogen Concentrations

Jinshan Lake is a famous urban landscape lake with approximately 8.8 km2water area, which is located on the north of Zhenjiang, of Jiangsu Province, China. Eighteen sampled sites were selected and overlying water was sampled from 2013 to 2014 to study the seasonal and spatial variation of nitrogen in overlying water of Jinshan Lake. Results showed that physicochemical characteristics of temperature, pH, and DO showed high seasonal variation, whereas they had no significant spatial differences in the 18 sampling points (P>0.05) in overlying water of Jinshan Lake. Nitrogen concentrations showed strong seasonal variation trends. The ranked order of TN was as follows: spring > summer > autumn > winter; the order ofNH4+-N was as follows: spring > autumn > summer > winter, whereasNO3--N concentrations revealed an inverse seasonal pattern, with maxima occurring in winter and minimal values occurring in spring. Nitrogen concentrations had dramatic spatial changes in 18 sampling points of Jinshan Lake. Physicochemical parameter difference, domestic wastes pollution, and rainfall runoff source may have led to seasonal and spatial fluctuation variations of nitrogen in overlying water of Jinshan Lake, China.

Engineering-Geological Studies Of The Territory, Soils Of Foundation And Foundations Of The Architectural Monument Of The "Melnikov’s House" In Moscow

2019 ◽  
pp. 41-51
Keyword(s):  
Working Condition ◽  
Overlying Water ◽  
North East ◽  
The North ◽  
Geological Processes ◽  
Architectural Monument ◽  
Geological Conditions ◽  
Zone Of Influence ◽  
Complex Engineering ◽  
Building Engineering

On the basis of engineering and design surveys of the building, engineering-geological and geophysical studies of the soils of the territory conducted by the article authors, as well as with due regard for the results of studies conducted on this territory by other authors, the features of the foundations, soils of their foundation and engineering-geological conditions of the territory of the Melnikov House are established. It is shown that the Melnikov house is located under complex engineering-geological conditions on the territory of high geological risk, in the zone of influence of tectonic disturbance. To the North of the area there is a zone of intersection of the observed disturbance with a larger disturbance that can have an impact on geological processes. To the North-East of the site of the Melnikov House, a sharp immersion of the roof of carbon deposits was revealed. It promotes groundwater seepage into limestone of the carbonate strata from overlying water-bearing sands and activation of processes of suffusion removal and sinkhole phenomena of the soil. The surveyed area is assessed as potentially karst-hazardous and adjacent to it from the North-East territory as karst-dangerous. In this regard any construction on the adjacent territory can provoke activation of sinkhole phenomena on the surface. The foundations of the building are basically in working condition. Existing defects can be eliminated during repair. The foundation soils mainly have sufficient bearing capacity. Areas of the base with bulk soil can be reinforced. However, when developing a project for the reconstruction of the building and its territory, it should be taken into account that the design of the Melnikov House does not provide for its operation on the loads at the formation of sinkholes.

Emplacing Berlin: Digital Itineraries and Short-term Study Abroad in the City

2018 ◽  
Vol 12 (1) ◽  
pp. 26-36 ◽  
Author(s):  
Richard B. Apgar
Keyword(s):  
Study Abroad ◽  
Urban Landscape ◽  
Physical Space ◽  
Short Term ◽  
Study Abroad Programs ◽  
Term Study ◽  
Digital Maps ◽  
Short Term Study ◽  
The City

As destination of choice for many short-term study abroad programs, Berlin offers students of German language, culture and history a number of sites richly layered with significance. The complexities of these sites and the competing narratives that surround them are difficult for students to grasp in a condensed period of time. Using approaches from the spatial humanities, this article offers a case study for enhancing student learning through the creation of digital maps and itineraries in a campus-based course for subsequent use during a three-week program in Berlin. In particular, the concept of deep mapping is discussed as a means of augmenting understanding of the city and its history from a narrative across time to a narrative across the physical space of the city. As itineraries, these course-based projects were replicated on site. In moving from the digital environment to the urban landscape, this article concludes by noting meanings uncovered and narratives formed as we moved through the physical space of the city.

Aquarelles parisiennes: Gautier, Baudelaire, and the Poetry of Urban Watercolours

2019 ◽  
Vol 58 (2) ◽  
pp. 170-182
Author(s):  
Karen F. Quandt
Keyword(s):  
Urban Landscape ◽  
Second Empire ◽  
Theophile Gautier ◽  
Avant Garde ◽  
Meeting Point ◽  
Mise En Scene ◽  
Bleed Through ◽  
Fleurs Du Mal

Baudelaire refers in his first essay on Théophile Gautier (1859) to the ‘fraîcheurs enchanteresses’ and ‘profondeurs fuyantes’ yielded by the medium of watercolour, which invites a reading of his unearthing of a romantic Gautier as a prescription for the ‘watercolouring’ of his own lyric. If Paris's environment was tinted black as a spiking population and industrial zeal made their marks on the metropolis, Baudelaire's washing over of the urban landscape allowed vivid colours to bleed through the ‘fange’. In his early urban poems from Albertus (1832), Gautier's overall tint of an ethereal atmosphere as well as absorption of chaos and din into a lulling, muted harmony establish the balmy ‘mise en scène’ that Baudelaire produces at the outset of the ‘Tableaux parisiens’ (Les Fleurs du mal, 1861). With a reading of Baudelaire's ‘Tableaux parisiens’ as at once a response and departure from Gautier, or a meeting point where nostalgia ironically informs an avant-garde poetics, I show in this paper how Baudelaire's luminescent and fluid traces of color in his urban poems, no matter how washed or pale, vividly resist the inky plumes of the Second Empire.

‘Otherwise in London’ or, the ‘Essence of Things’: Modernity and Estrangement in the Nineteenth-Century Cityscape

2015 ◽  
Vol 5 (1) ◽  
pp. 17-35
Author(s):  
Julian Wolfreys
Keyword(s):  
Nineteenth Century ◽  
William Wordsworth ◽  
Urban Landscape ◽  
Thomas De Quincey ◽  
Urban Centre ◽  
Early Nineteenth Century ◽  
Urban Representation ◽  
Robert Southey ◽  
The World ◽  
The City

Writers of the early nineteenth century sought to find new ways of writing about the urban landscape when first confronted with the phenomena of London. The very nature of London's rapid growth, its unprecedented scale, and its mere difference from any other urban centre throughout the world marked it out as demanding a different register in prose and poetry. The condition of writing the city, of inventing a new writing for a new experience is explored by familiar texts of urban representation such as by Thomas De Quincey and William Wordsworth, as well as through less widely read authors such as Sarah Green, Pierce Egan, and Robert Southey, particularly his fictional Letters from England.

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