The Case Study Area

2021 ◽  
pp. 9-13
Author(s):  
Adey Nigatu Mersha
Keyword(s):  
2019 ◽  
Vol 9 (1) ◽  
pp. 154-173
Author(s):  
I. Mintourakis ◽  
G. Panou ◽  
D. Paradissis

Abstract Precise knowledge of the oceanic Mean Dynamic Topography (MDT) is crucial for a number of geodetic applications, such as vertical datum unification and marine geoid modelling. The lack of gravity surveys over many regions of the Greek seas and the incapacity of the space borne gradiometry/gravity missions to resolve the small and medium wavelengths of the geoid led to the investigation of the oceanographic approach for computing the MDT. We compute two new regional MDT surfaces after averaging, for given epochs, the periodic gridded solutions of the Dynamic Ocean Topography (DOT) provided by two ocean circulation models. These newly developed regional MDT surfaces are compared to three state-of-theart models, which represent the oceanographic, the geodetic and the mixed oceanographic/geodetic approaches in the implementation of the MDT, respectively. Based on these comparisons, we discuss the differences between the three approaches for the case study area and we present some valuable findings regarding the computation of the regional MDT. Furthermore, in order to have an estimate of the precision of the oceanographic approach, we apply extensive evaluation tests on the ability of the two regional ocean circulation models to track the sea level variations by comparing their solutions to tide gauge records and satellite altimetry Sea Level Anomalies (SLA) data. The overall findings support the claim that, for the computation of the MDT surface due to the lack of geodetic data and to limitations of the Global Geopotential Models (GGMs) in the case study area, the oceanographic approach is preferable over the geodetic or the mixed oceano-graphic/geodetic approaches.


2018 ◽  
Vol 18 (11) ◽  
pp. 3089-3108 ◽  
Author(s):  
Ayse Duha Metin ◽  
Nguyen Viet Dung ◽  
Kai Schröter ◽  
Björn Guse ◽  
Heiko Apel ◽  
...  

Abstract. Flood risk is impacted by a range of physical and socio-economic processes. Hence, the quantification of flood risk ideally considers the complete flood risk chain, from atmospheric processes through catchment and river system processes to damage mechanisms in the affected areas. Although it is generally accepted that a multitude of changes along the risk chain can occur and impact flood risk, there is a lack of knowledge of how and to what extent changes in influencing factors propagate through the chain and finally affect flood risk. To fill this gap, we present a comprehensive sensitivity analysis which considers changes in all risk components, i.e. changes in climate, catchment, river system, land use, assets, and vulnerability. The application of this framework to the mesoscale Mulde catchment in Germany shows that flood risk can vary dramatically as a consequence of plausible change scenarios. It further reveals that components that have not received much attention, such as changes in dike systems or in vulnerability, may outweigh changes in often investigated components, such as climate. Although the specific results are conditional on the case study area and the selected assumptions, they emphasize the need for a broader consideration of potential drivers of change in a comprehensive way. Hence, our approach contributes to a better understanding of how the different risk components influence the overall flood risk.


2012 ◽  
Vol 66 (7) ◽  
pp. 1534-1539 ◽  
Author(s):  
J. Dirksen ◽  
E. J. Baars ◽  
J. G. Langeveld ◽  
F. H. L. R. Clemens

This paper assesses the influence of (differential) settlement on sewer system functioning. Based on historical data of the vertical position of sewer invert levels, tilt measurements and in-sewer inspection videos, settlement and settlement related influences are analyzed for a case study area in Amsterdam. The average settlement rate of this system was 4 mm/year. Given this settlement rate, it is shown that settlement significantly influences sewer system functioning within the lifetime of a sewer (system).


2015 ◽  
Vol 29 (3) ◽  
pp. 333-343 ◽  
Author(s):  
Hae-Jin Cho ◽  
◽  
Dal-Ho Kim ◽  
Man-Seok Shin ◽  
Tehan Kang ◽  
...  

Author(s):  
Kheira Yamani ◽  
Abdelkrim Hazzab ◽  
Mohamed Sekkoum ◽  
Toumi Slimane

1987 ◽  
Vol 19 (9) ◽  
pp. 1175-1197 ◽  
Author(s):  
I Munt

The gentrification literature is initially reviewed in this paper, and Marxist, institutionalist, and individual approaches are distinguished. The theoretical and empirical weaknesses of each are indicated. It is argued that two factors are central to an understanding of gentrification: first, the economic restructuring of central London, which has resulted in the growth of corporate—professional employment; and second, demand factors that are divided into the economic and the environmental. In part 2 of the paper, Battersea (the case study area) is set within the context of Inner London and the Borough of Wandsworth, of which it is a part. Census data are used to indicate the marked changes in tenure, socioeconomic composition of residents, and the employment structure. Then in part 3, the characteristics of gentrifiers are examined through a survey conducted in an area of Battersea, and the expressed economic and cultural preferences of these gentrifiers are focused upon, therefore emphasising ‘demand’. It is argued that in stressing supply, Marxist and institutionalist explanations of gentrification have ignored demand, and that individualist work, which although recognises demand, fails to place it in the correct economic and cultural context. In sum, the restructuring of employment in central London and the factors of demand are seen as inextricably linked in an explanation of gentrification.


2021 ◽  
Author(s):  
Annie Chow

Alternative sources of energy are being sought after in the world today, as the availability of fossil fuels and other non-renewable resources are declining. Solar energy offers a promising solution to this search as it is a less polluting renewable energy resource and can be easily converted into electricity through the usage of photovoltaic systems. This thesis focuses on the modeling of urban solar energy with high spatiotemporal resolution. A methodology was developed to estimate hourly solar PV electricity generation potential on rooftops in an urban environment using a 3-D model. A case study area of Ryerson University, Toronto was chosen and the incident solar radiation upon each building rooftop was calculated using a software tool called Ecotect Analysis 2011. Secondly, orthophotos of the case study area were digitized using Geographic Information Systems in order to eliminate undesirable rooftop objects within the model. Lastly, a software tool called HOMER was used to generate hourly solar PV electricity estimates using the values generated by the other two software tools as input parameters. It was found that hourly solar PV output followed the pattern of a binomial curve and that peak solar generation times coincided with summer peak electricity consumption hours in Ontario.


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